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Journal articles on the topic 'Aerial surveys in forestry'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Johnson, E. W., and D. Wittwer. "Aerial detection surveys in the United States." Australian Forestry 71, no. 3 (2008): 212–15. http://dx.doi.org/10.1080/00049158.2008.10675037.

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Martin, Maxence, Nicole J. Fenton, and Hubert Morin. "Boreal old-growth forest structural diversity challenges aerial photographic survey accuracy." Canadian Journal of Forest Research 50, no. 2 (2020): 155–69. http://dx.doi.org/10.1139/cjfr-2019-0177.

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The erosion of old-growth forests in boreal managed landscapes is a major issue currently faced by forest managers; however, resolving this problem requires accurate surveys. The intention of our study was to determine if historic operational aerial forest surveys accurately identified boreal old-growth forests in Quebec, Canada. We first compared stand successional stages (even-aged vs. old-growth) in two aerial surveys performed in 1968 (preindustrial aerial survey) and 2007 (modern aerial survey) on the same 2200 km2 territory. Second, we evaluated the accuracy of the modern aerial survey b

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Miller, Zachary M., Joseph Hupy, Aishwarya Chandrasekaran, Guofan Shao, and Songlin Fei. "Application of Postprocessing Kinematic Methods with UAS Remote Sensing in Forest Ecosystems." Journal of Forestry 119, no. 5 (2021): 454–66. http://dx.doi.org/10.1093/jofore/fvab021.

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Abstract Unmanned Aerial Systems (UAS) serve as an excellent remote-sensing platform to fulfill an aerial imagery data collection niche previously unattainable in forestry by satellites and manned aircraft. However, for UAS-derived data to be spatially representative, a precise network of ground control points (GCP) is often required, which can be tedious and limit the logistical benefits of UAS rapid deployment capabilities, especially in densely forested areas. Therefore, methods for efficient data collection without GCPs are highly desired in UAS remote sensing. Here, we demonstrate the use

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Nelson, Trisalyn, Barry Boots, and Michael A. Wulder. "Large-area mountain pine beetle infestations: Spatial data representation and accuracy." Forestry Chronicle 82, no. 2 (2006): 243–52. http://dx.doi.org/10.5558/tfc82243-2.

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Point data generated from helicopter surveys are used to determine the location and magnitude of mountain pine beetle infestations. Although collected for tactical planning, these data also provide a rich source of information for scientific investigations. To facilitate spatial research, it is important to consider how to best represent spatially explicit mountain pine beetle infestation data. This paper focuses on the spatial representation of point-based aerial helicopter surveys, which can be difficult to represent due to issues associated with large data quantities and data uncertainty. I

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Béland, Jean-Michel, Éric Bauce, Conrad Cloutier, Richard Berthiaume, and Christian Hébert. "Accuracy of Defoliation Estimates from Aerial and Ground Surveys in a Boreal Forest during an Outbreak of the Hemlock Looper, Lambdina fiscellaria (Guenée)." Forests 13, no. 7 (2022): 1120. http://dx.doi.org/10.3390/f13071120.

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Annual estimates of defoliation are important tools for managing forest insect defoliators such as the hemlock looper, which feeds on conifer needles of all age classes. We tested the accuracy of defoliation classes obtained from aerial surveys by comparing them with ground-based estimates during a recent outbreak of this insect. We used an approach derived from the Fettes method to estimate defoliation on the current-year shoots as well as on the shoots of the four previous years. Defoliation on the current-year shoots provided accurate estimates of the overall defoliation and the strength of

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Brand, David G., Donald G. Leckie, and Edward E. Cloney. "Forest regeneration surveys: Design, data collection, and analysis." Forestry Chronicle 67, no. 6 (1991): 649–57. http://dx.doi.org/10.5558/tfc67649-6.

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Regeneration surveys have always been looked on as a necessary evil in silviculture. Huge amounts of data have been collected, only to answer simple questions or to be filed and never used. This paper addresses the possibility of changing regeneration surveys from simple legislative requirements, into components of the forestry information system. Current technology allows the development of sophisticated decision support systems, and this changes the whole perspective on information needed from regeneration surveys. Depending on the level of information needed, ground surveys or aerial survey

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7

Williams, J. "Review: Digital Aerial Survey: Theory and Practice." Forestry 77, no. 2 (2004): 173–74. http://dx.doi.org/10.1093/forestry/77.2.173-a.

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8

Waters, William E., and Robert W. Graebner. "Sampling Aerial Photographs for Estimation of Pest-Caused Tree Mortality." Western Journal of Applied Forestry 1, no. 3 (1986): 84–89. http://dx.doi.org/10.1093/wjaf/1.3.84.

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Abstract Six methods of estimating pest-caused tree mortality were evaluated by computer-based sampling of the aerial photo and numerical database of a 9,320 ha area of ponderosa pine (Pinus ponderosa) in the central Sierra Nevada, California. Two sampling universes were defined, one comprising 9 X 9 in photo units, the other 70 mm photo units. Of the sampling designs simulated, 2-stage designs involving subsampling of photo strips with either equal or variable probability provided estimates with the lowest standard deviations, and hence would require smaller sample sizes (and less photo-inter

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9

Taylor, Sarah L., and David A. MacLean. "Validation of Spruce Budworm Outbreak History Developed from Aerial Sketch Mapping of Defoliation in New Brunswick." Northern Journal of Applied Forestry 25, no. 3 (2008): 139–45. http://dx.doi.org/10.1093/njaf/25.3.139.

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Abstract Aerial sketch mapping (ASM) of annual defoliation provides a means to quantify spruce budworm (Choristoneura fumiferana Clem.) outbreak histories, but accuracy is affected by factors such as navigation and weather conditions. We used ground-based defoliation estimates from 123 permanent sample plots (PSP) in New Brunswick and increment core growth data from a subset of PSPs, to validate ASM estimates of defoliation. From 1985 to 1993, 85% of 332 cases were correctly classified by aerial estimates as nil–light (0–30%) or moderate–severe (31–100%), with the proportion correct varying by

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10

Johnson, Erik W., and Jennifer Ross. "Quantifying error in aerial survey data." Australian Forestry 71, no. 3 (2008): 216–22. http://dx.doi.org/10.1080/00049158.2008.10675038.

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11

Livingston, R. L., J. E. Dewey, D. P. Beckman, and L. E. Stipe. "Distribution of the Balsam Woolly Adelgid in Idaho." Western Journal of Applied Forestry 15, no. 4 (2000): 227–31. http://dx.doi.org/10.1093/wjaf/15.4.227.

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Abstract The balsam woolly adelgid (Adelges piceae) was introduced from Europe to northeastern North America in about 1900. In 1983, it was discovered infesting fir trees in Idaho. Since then, aerial and ground surveys have documented its spread in Idaho over an area of approximately 14,000 mi2 (8,960,000 ac). It now covers most of the central one-third of the state. Aerial surveys in 1997 and 1998 identified about 125,000 ac of host type with dead or damaged trees. Subalpine fir (Abies lasiocarpa) is a critical species in many high elevation areas. The effects of the balsam wooly adelgid on a

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12

Borgogno-Mondino, Enrico, Samuele De Petris, Filippo Sarvia, Evelyn Joan Momo, Fabio Sussio, and Paolo Pari. "Adoption of Digital Aerial Photogrammetry in Forest Planning: A Case Study of Canavese Forestry Consortium, NW Italy with Technical and Economic Issues." Land 11, no. 8 (2022): 1350. http://dx.doi.org/10.3390/land11081350.

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The forestry sector has been significantly affected by the recent advances in geomatics. Photogrammetric aerial acquisitions provide full coverage of forests, making possible a wall-to-wall mapping of the main forestry key variables, such as tree height and tree density, needed for forest planning and management purposes. This work summarizes the role that digital aerial photogrammetry (DAP) is expected to have in the forest planning context and analyzes the main products from DAP that are significantly required. According to their technical features, some strategies are proposed to program ac

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Green, P. Corey, and Harold E. Burkhart. "Plantation Loblolly Pine Seedling Counts with Unmanned Aerial Vehicle Imagery: A Case Study." Journal of Forestry 118, no. 5 (2020): 487–500. http://dx.doi.org/10.1093/jofore/fvaa020.

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Abstract Abstract An unmanned aircraft system was evaluated for its potential to capture imagery for use in plantation loblolly pine (Pinus taeda L.) regeneration surveys. Five stands located in the Virginia Piedmont were evaluated. Imagery was collected using a recreational grade unmanned aerial vehicle at three flight heights above ground with a camera capable of capturing red–green–blue imagery. Two computer vision approaches were evaluated for their potential to automatically detect seedlings. The results of the study indicated that the proposed methods were limited in capability of genera

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Bright, Benjamin C., Andrew T. Hudak, Joel M. Egan, et al. "Using Satellite Imagery to Evaluate Bark Beetle-Caused Tree Mortality Reported in Aerial Surveys in a Mixed Conifer Forest in Northern Idaho, USA." Forests 11, no. 5 (2020): 529. http://dx.doi.org/10.3390/f11050529.

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Bark beetles cause significant tree mortality in western North America. The United States Forest Service coordinates annual insect and disease surveys (IDS) by observers in airplanes to map and quantify the tree mortality caused by beetles. The subjective nature of these surveys means that accuracy evaluation is important for characterizing uncertainty. Furthermore, the metric reported for quantifying tree mortality recently changed (2012–2018 depending in region) from killed trees per acre to percent tree mortality within damage polygons, posing challenges for linking older and newer records.

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Bachmann, Peter. "Vierzig Jahre permanente Stichprobeninventuren in der Schweiz | Forty years of permanent inventory sampling in Switzerland's forests." Schweizerische Zeitschrift fur Forstwesen 154, no. 3-4 (2003): 99–101. http://dx.doi.org/10.3188/szf.2003.0099.

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Permanent sampling procedures were introduced into Swiss Forestry Management around forty years ago. Discussions arising from two of six talks (from P. Brassel and M. Zobeiry) presented at a Monday Colloquium devoted to this theme at the ETH Zurich are summarised. The successful Swiss National Forest Inventory, which has been carried out twice so far, is based on permanent earth samples, and supplemented with aerial surveys. For financial reasons, the planned third survey will only comprise one repetition of the second sampling with a few additions to the catalogue of characteristics. In the n

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Hanavan, Ryan P., Aaron G. Kamoske, Abigail N. Schaaf, et al. "Supplementing the Forest Health National Aerial Survey Program with Remote Sensing during the COVID-19 Pandemic: Lessons Learned from a Collaborative Approach." Journal of Forestry 120, no. 2 (2021): 125–32. http://dx.doi.org/10.1093/jofore/fvab056.

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Abstract The COVID-19 pandemic has created unprecedented challenges in the way the USDA Forest Service conducts business. Standard data collection methods were immediately challenged due to travel restrictions and due to uncertainty regarding when it would be safe to return to a “business as usual” approach. These challenges were met with an inspiring collaboration between forest health specialists directly involved in the annual Aerial Detection Survey (ADS) program and remote sensing specialists from the Forest Service and academia. This group worked together to generate informative training

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Spruce, Hicke, Hargrove, Grulke, and Meddens. "Use of MODIS NDVI Products to Map Tree Mortality Levels in Forests Affected by Mountain Pine Beetle Outbreaks." Forests 10, no. 9 (2019): 811. http://dx.doi.org/10.3390/f10090811.

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Extensive bark beetle outbreaks have recently occurred in western North American forests, resulting in overstory tree mortality across millions of hectares. Annual aerial surveys are currently used to operationally monitor bark beetle induced tree mortality, though this method is subjective and can exclude some forest areas. Daily Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data offer a potential alternative means to develop regional tree mortality maps. Accurate methods using such data could aid natural resource managers in surveys of forests with frequent overstory mortal

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Mohiuddin, Abdullah, Taha Tarek, Yahya Zweiri, and Dongming Gan. "A Survey of Single and Multi-UAV Aerial Manipulation." Unmanned Systems 08, no. 02 (2020): 119–47. http://dx.doi.org/10.1142/s2301385020500089.

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Aerial manipulation has direct application prospects in environment, construction, forestry, agriculture, search, and rescue. It can be used to pick and place objects and hence can be used for transportation of goods. Aerial manipulation can be used to perform operations in environments inaccessible or unsafe for human workers. This paper is a survey of recent research in aerial manipulation. The aerial manipulation research has diverse aspects, which include the designing of aerial manipulation platforms, manipulators, grippers, the control of aerial platform and manipulators, the interaction

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19

Campbell, Robert A., and Craig A. Howard. "Priorities for forestry herbicide application technology research." Canadian Journal of Forest Research 23, no. 10 (1993): 2204–12. http://dx.doi.org/10.1139/x93-273.

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A survey was conducted to determine research priorities for forest herbicide application technology research. It was sent to persons, primarily in Canada and the United States, with an interest in the topic (users, applicators, researchers, and regulators). Respondents indicated support for both aerial and ground application technology research. The top 10 priorities of all respondents combined for future herbicide application technology research were as follows: (1) determine appropriate scientifically-based buffer zones, (2) develop technology to allow the same efficacy with reduced active i

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Coggins, Sam B., Michael A. Wulder, Nicholas C. Coops, and Joanne C. White. "Linking survey detection accuracy with ability to mitigate populations of mountain pine beetle." Forestry Chronicle 84, no. 6 (2008): 900–909. http://dx.doi.org/10.5558/tfc84900-6.

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In 2007, the mountain pine beetle impacted an estimated 10.1 million hectares of pine forest in British Columbia, Canada. Surveys to detect the location, size, and impact of infestations are conducted from field, airborne, and satellite perspectives. Importantly, the differing survey approaches characterize the infestation over dissimilar spatial scales (i.e., trees, stands, landscapes), and with varying levels of detection accuracy. In this communication, we provide background for understanding differing survey approaches, the nature of the information generated, the resultant detection accur

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Zagalikis, G., A. D. Cameron, and D. R. Miller. "The application of digital photogrammetry and image analysis techniques to derive tree and stand characteristics." Canadian Journal of Forest Research 35, no. 5 (2005): 1224–37. http://dx.doi.org/10.1139/x05-030.

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Ground-based forest inventory surveys can provide highly accurate measurements of tree and stand characteristics, but these are expensive to carry out. Aerial photography has been used for several decades as a tool in forest management and inventory. However, conventional methods of interpretation are both time-consuming and costly, with results varying among interpreters. With continuing development of personal computer technology, aerial photographs have become more accessible for digital analysis. This paper presents the potential operational use of digitized aerial photographs for the esti

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Pitt, Douglas G., Robert G. Wagner, Ronald J. Hall, Douglas J. King, Donald G. Leckie, and Ulf Runesson. "Use of remote sensing for forest vegetation management: A problem analysis." Forestry Chronicle 73, no. 4 (1997): 459–77. http://dx.doi.org/10.5558/tfc73459-4.

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Forest managers require accurate and timely data that describe vegetation conditions on cutover areas to assess vegetation development and prescribe actions necessary to achieve forest regeneration objectives. Needs for such data are increasing with current emphasis on ecosystem management, escalating silvicultural treatment costs, evolving computer-based decision support tools, and demands for greater accountability. Deficiencies associated with field survey methods of data acquisition (e.g. high costs, subjectivity, and low spatial and temporal coverage) frequently limit decision-making effe

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Đuka, Andreja, Kristijan Tomljanović, Milivoj Franjević, David Janeš, Ivan Žarković, and Ivica Papa. "Application and Accuracy of Unmanned Aerial Survey Imagery after Salvage Logging in Different Terrain Conditions." Forests 13, no. 12 (2022): 2054. http://dx.doi.org/10.3390/f13122054.

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The accuracy of the positioning of the data collected by remote sensing platforms is of great importance in forest and wildlife surveys, salvage logging, soil disturbances after felling operations, fire risk management and many other forestry-based research. The significance of bark beetles in silver fir and Norway spruce stands is an essential factor that can affect the increase in biomass quantity and the reduction of its quality. Due to an Ips typographus (L.) outbreaks in the central part of Croatia from 2016 to 2021, salvage logging was performed in an area of 11,940 ha, with terrain slop

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Hall, R. J., and A. H. Aldred. "Forest regeneration appraisal with large-scale aerial photographs." Forestry Chronicle 68, no. 1 (1992): 142–50. http://dx.doi.org/10.5558/tfc68142-1.

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The operational feasibility of using large-scale aerial photographs to quantify coniferous forest stocking and regeneration density, was assessed over 6 cutovers with a 1,700 ha total area. The project involved two stages: one to pre-stratify cutover stocking levels using 1:10,000 general-coverage, colour photos; and the second to sample intensively, stocking and density using 1:500 large-scale photos. The accuracy, cost and practical problems in using large-scale sampling photos for regeneration assessment were determined. Accuracy assessment included detectability of young trees, species int

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Blancher, Peter J., R. Dean Phoenix, Debra S. Badzinski, et al. "Population trend status of Ontario’s forest birds." Forestry Chronicle 85, no. 2 (2009): 184–201. http://dx.doi.org/10.5558/tfc85184-2.

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Recent population trends of Ontario’s forest birds were assessed by integrating results across 8 bird surveys to provide an estimate of trend status for all of Ontario, and for 2 forested regions of Ontario separately. Surveys with mid- and longterm trends were relied on most extensively in this assessment. Comparison of the first and second Breeding Bird Atlases was especially important for estimating trends in northern forests, but overall reliability of status assessments in the north was considered poor due to limited coverage and significant potential for bias. Trends of most forest birds

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Pessacg, Facundo, Francisco Gómez-Fernández, Matías Nitsche, et al. "Simplifying UAV-Based Photogrammetry in Forestry: How to Generate Accurate Digital Terrain Model and Assess Flight Mission Settings." Forests 13, no. 2 (2022): 173. http://dx.doi.org/10.3390/f13020173.

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In forestry, aerial photogrammetry by means of Unmanned Aerial Systems (UAS) could bridge the gap between detailed fieldwork and broad-range satellite imagery-based analysis. However, optical sensors are only poorly capable of penetrating the tree canopy, causing raw image-based point clouds unable to reliably collect and classify ground points in woodlands, which is essential for further data processing. In this work, we propose a novel method to overcome this issue and generate accurate a Digital Terrain Model (DTM) in forested environments by processing the point cloud. We also developed a

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Wulder, M. A., R. S. Skakun, S. E. Franklin, and J. C. White. "Enhancing forest inventories with mountain pine beetle infestation information." Forestry Chronicle 81, no. 1 (2005): 149–59. http://dx.doi.org/10.5558/tfc81149-1.

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Polygon decomposition is an approach for integrating different data sources within a GIS. We use this approach to understand the impacts associated with mountain pine beetle red attack. Three different sources of red attack information are considered: aerial overview sketch mapping, helicopter GPS surveys, and Landsat imagery. Existing inventory polygons are augmented with estimates of the proportion and area of red attack damage. Although differences are found in the area of the infestation, the affected forest stands have similar characteristics. Polygon decomposition adds value to existing

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Moe, Kyaw, Toshiaki Owari, Naoyuki Furuya, and Takuya Hiroshima. "Comparing Individual Tree Height Information Derived from Field Surveys, LiDAR and UAV-DAP for High-Value Timber Species in Northern Japan." Forests 11, no. 2 (2020): 223. http://dx.doi.org/10.3390/f11020223.

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High-value timber species such as monarch birch (Betula maximowicziana Regel), castor aralia (Kalopanax septemlobus (Thunb.) Koidz), and Japanese oak (Quercus crispula Blume) play important ecological and economic roles in forest management in the cool temperate mixed forests in northern Japan. The accurate measurement of their tree height is necessary for both practical management and scientific reasons such as estimation of biomass and site index. In this study, we investigated the similarity of individual tree heights derived from conventional field survey, digital aerial photographs derive

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Boer, Arnold H. "Transience of deer wintering areas." Canadian Journal of Forest Research 22, no. 9 (1992): 1422–23. http://dx.doi.org/10.1139/x92-189.

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Fidelity of white-tailed deer (Odocoileusvirginianus) to wintering areas was examined in west-central New Brunswick. Wintering areas were located and mapped during aerial surveys in 1975 and 1987–1989. Of 99 wintering areas identified in 1975, 42 were unoccupied 13 years later. Small wintering areas (<50 ha) were more likely to be unoccupied in the subsequent survey than larger ones (>100 ha). Forest cutting had a profound effect on transience of wintering areas. Small clearcuts within a wintering area increased the likelihood of deer use. Wintering areas that were completely clear-cut w

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Wulder, Michael A., Joanne C. White, Allan L. Carroll, and Nicholas C. Coops. "Challenges for the operational detection of mountain pine beetle green attack with remote sensing." Forestry Chronicle 85, no. 1 (2009): 32–38. http://dx.doi.org/10.5558/tfc85032-1.

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Mountain pine beetle infestations are spatially correlated; current (green) attack is often located near previous (red) attack. This spatial correlation between the green and red attack stages enables operational survey methods, as detection of red attack trees—typically from an airborne survey such as a helicopter GPS survey or aerial photography—guides the location of subsequent ground surveys for green attack trees. Forest managers, in an attempt to understand beetle movement and infestation patterns, hope to utilize remotely sensed data to detect and map green attack trees, with the expect

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MacLean, David A., and Wayne E. MacKinnon. "Accuracy of aerial sketch-mapping estimates of spruce budworm defoliation in New Brunswick." Canadian Journal of Forest Research 26, no. 12 (1996): 2099–108. http://dx.doi.org/10.1139/x26-238.

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The accuracy of aerial sketch-mapping estimates of spruce budworm (Choristoneurafumiferana (Clem.)) defoliation was evaluated from 1984 to 1993 in 222–325 sample plots in spruce (Picea sp.)–balsam fir (Abiesbalsamea (L.) Mill.) stands in New Brunswick. Operational aerial defoliation estimates were used, wherein all productive forest in known budworm infestation zones was surveyed each year from small aircraft with flight lines 2–5 km apart, and rated in classes of nil (0–10%), light (11–30%), moderate (31–70%), and severe (71–100%). Aerial defoliation estimates were compared with ground-based

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Scarr, Taylor A., Anthony A. Hopkin, and Gordon M. Howse. "Aerial sketch-mapping of the 1998 ice storm in eastern Ontario." Forestry Chronicle 79, no. 1 (2003): 91–98. http://dx.doi.org/10.5558/tfc79091-1.

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The 1998 ice storm in eastern Ontario was quantified using aerial mapping to determine the geographic area affected, and the severity of damage to the forests. Prior to mapping a reconnaissance flight was used to establish methodology. Mapping was accomplished by experienced technicians flying in a helicopter, 60–100 m above the canopy. Damage was sketch-mapped onto topographic maps then digitized using a geographical information system. Remotely sensed ground cover data were used to remove non-forested and sparsely forested areas from map polygons, to better estimate the area of affected hard

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Cromwell, Connor, Jesse Giampaolo, Joseph Hupy, Zachary Miller, and Aishwarya Chandrasekaran. "A Systematic Review of Best Practices for UAS Data Collection in Forestry-Related Applications." Forests 12, no. 7 (2021): 957. http://dx.doi.org/10.3390/f12070957.

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Recent advancements in unmanned aerial systems and GPS technology, allowing for centimeter precision without ground-based surveys, have been groundbreaking for applications in the field of forestry. As this technology becomes integrated into forest management approaches, it is important to consider the implementation of proper safety and data collection strategies. The creation of such documentation is beneficial, because it allows for those aspiring to create a UAS program to learn from others’ experiences, without bearing the consequences of past blunders associated with the development of t

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Qiu, Zixuan, Zhong-Ke Feng, Mingming Wang, Zhenru Li, and Chao Lu. "Application of UAV Photogrammetric System for Monitoring Ancient Tree Communities in Beijing." Forests 9, no. 12 (2018): 735. http://dx.doi.org/10.3390/f9120735.

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Ancient tree community surveys have great scientific value to the study of biological resources, plant distribution, environmental change, genetic characteristics of species, and historical and cultural heritage. The largest ancient pear tree communities in China, which are rare, are located in the Daxing District of Beijing. However, the environmental conditions are tough, and the distribution is relatively dispersed. Therefore, a low-cost, high-efficiency, and high-precision measuring system is urgently needed to complete the survey of ancient tree communities. By unmanned aerial vehicle (UA

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Feduck, Corey, Gregory McDermid, and Guillermo Castilla. "Detection of Coniferous Seedlings in UAV Imagery." Forests 9, no. 7 (2018): 432. http://dx.doi.org/10.3390/f9070432.

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Rapid assessment of forest regeneration using unmanned aerial vehicles (UAVs) is likely to decrease the cost of establishment surveys in a variety of resource industries. This research tests the feasibility of using UAVs to rapidly identify coniferous seedlings in replanted forest-harvest areas in Alberta, Canada. In developing our protocols, we gave special consideration to creating a workflow that could perform in an operational context, avoiding comprehensive wall-to-wall surveys and complex photogrammetric processing in favor of an efficient sampling-based approach, consumer-grade cameras,

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Sanaa, Fadil, Sebari Imane, Bouhaloua Mohamed, et al. "Biomass and Carbon Stock Quantification in Cork Oak Forest of Maamora Using a New Approach Based on the Combination of Aerial Laser Scanning Carried by Unmanned Aerial Vehicle and Terrestrial Laser Scanning Data." Forests 13, no. 8 (2022): 1211. http://dx.doi.org/10.3390/f13081211.

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The Mediterranean forests, particularly Cork oak (Quercus suber L., 1927), make a major contribution to the fight against climate change through Carbon sequestration. Hence, there is a great interest in the accurate quantification of biomass and carbon stock. In this context, this study aims at assessing the performance of a new approach, based on the combination of Unmanned aerial vehicle airborne Aerial laser scanning (ALS-UAV) and Terrestrial laser scanning (TLS) data, in the determination of dendrometric parameters (Circumference at 1.30 m and Tree Height), and consequently the estimation

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Ginzler, Christian, Lukas Mathys, and Esther Thürig. "Die Baumbedeckung in der Schweiz." Schweizerische Zeitschrift fur Forstwesen 162, no. 9 (2011): 344–49. http://dx.doi.org/10.3188/szf.2011.0344.

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Tree cover in Switzerland The requirements for national forest inventories have changed in recent decades, as have the issues involved. Initially, the focus was mainly information on timber resources, but today social and environmental functions are also of interest. An a priori separation of the surveyed areas into forest and non-forest during data collection limits the interpretation of the tree resources. Not all trees are located in the forest and not all forests are fully stocked. In the aerial photo interpretation of the 3rd National Forest Inventory, land cover on a regular sampling gri

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Leckie, Donald G. "Advances in remote sensing technologies for forest surveys and management." Canadian Journal of Forest Research 20, no. 4 (1990): 464–83. http://dx.doi.org/10.1139/x90-063.

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Canadian forest management has had a long history of developing and implementing remote sensing technology and is a major user of remote sensing. Despite difficulties in developing and implementing new digital remote sensing techniques, several key developments in Canadian forest management and in remote sensing and computer technology make the development and implementation of new remote sensing techniques at this time feasible and appropriate. Integration of different remote sensing technologies, remote sensing data with other information sources through geographic information systems, and r

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Schrader-Patton, Charlie, Nancy Grulke, and Craig Bienz. "Assessment of Ponderosa Pine Vigor Using Four-Band Aerial Imagery in South Central Oregon: Crown Objects to Landscapes." Forests 12, no. 5 (2021): 612. http://dx.doi.org/10.3390/f12050612.

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Ponderosa pine is an integral part of the forested landscape in the western US; it is the dominant tree species on landscapes that provide critical ecosystem services. Moderate drought tolerance allows it to occupy the transition zone between forests, open woodlands, and grasslands. Increases in stand density resulting from wildfire suppression, combined with lengthening, intensifying, and more frequent droughts have resulted in reduced tree vigor and stand health in dry ponderosa pine throughout its range. To address a management need for efficient landscape-level surveys of forest health, we

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Straub, Christoph, Christoph Stepper, Rudolf Seitz, and Lars T. Waser. "Potential of UltraCamX stereo images for estimating timber volume and basal area at the plot level in mixed European forests." Canadian Journal of Forest Research 43, no. 8 (2013): 731–41. http://dx.doi.org/10.1139/cjfr-2013-0125.

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Current technical advances in the field of digital photogrammetry demonstrate the great potential of automatic image matching for deriving dense surface measurements of the forest canopy. In contrast to airborne laser scanning (ALS), aerial stereo images are updated more regularly by national or regional mapping agencies in several countries. Frequently, ALS-based terrain models (DTMs) are available, and thus photogrammetric canopy heights can be derived. However, currently, there is little knowledge as to how accurately forest attributes can be modeled using the aerial stereo images acquired

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Azuma, David. "The Effects of a Western Spruce Budworm Outbreak on the Dead Wood Component in Relation to Ownership in Forests of Eastern Oregon." Western Journal of Applied Forestry 25, no. 4 (2010): 176–80. http://dx.doi.org/10.1093/wjaf/25.4.176.

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Abstract Forest Inventory and Analysis data were used to investigate the effects of a severe western spruce budworm outbreak on the dead wood component of forests in 11 counties of eastern Oregon for two time periods. The ownership and the level of damage (as assessed by aerial surveys) affected the resulting down woody material and standing dead trees. The pattern of coarse woody debris with respect to ownership and management intensity remained consistent into the next 10-year period. Harvesting tended to lower the amount of coarse woody debris on private forests. Federally managed forests h

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Coleman, Tom W., Andrew D. Graves, Zachary Heath, et al. "Accuracy of aerial detection surveys for mapping insect and disease disturbances in the United States." Forest Ecology and Management 430 (December 2018): 321–36. http://dx.doi.org/10.1016/j.foreco.2018.08.020.

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Hicke, Jeffrey A., Bingbing Xu, Arjan J. H. Meddens, and Joel M. Egan. "Characterizing recent bark beetle-caused tree mortality in the western United States from aerial surveys." Forest Ecology and Management 475 (November 2020): 118402. http://dx.doi.org/10.1016/j.foreco.2020.118402.

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Otto, Eric, Benjamin Held, Samuel Redford, and Robert A. Blanchette. "Detecting Heterobasidion irregulare in Minnesota and Assessment of Indigenous Fungi on Pines." Forests 12, no. 1 (2021): 57. http://dx.doi.org/10.3390/f12010057.

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Heterobasidion irregulare is one of the most problematic forest pathogens in the northern hemisphere, but has only been found relatively recently in the north central United States. Discovered in Wisconsin in 1993, but probably established sometime before that, it quickly spread throughout the state. In November 2014, it was found in southeastern Minnesota. Field surveys were then conducted throughout Minnesota with the focus in the southeast near the initial discovery. To find additional infection sites, surveys were conducted with accompanying aerial imagery of red pine (Pinus resinosa Aiton

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Zhang, Qingfan, Bo Wan, Zhenxiu Cao, Quanfa Zhang, and Dezhi Wang. "Exploring the Potential of Unmanned Aerial Vehicle (UAV) Remote Sensing for Mapping Plucking Area of Tea Plantations." Forests 12, no. 9 (2021): 1214. http://dx.doi.org/10.3390/f12091214.

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Mapping plucking areas of tea plantations is essential for tea plantation management and production estimation. However, on-ground survey methods are time-consuming and labor-intensive, and satellite-based remotely sensed data are not fine enough for plucking area mapping that is 0.5–1.5 m in width. Unmanned aerial vehicles (UAV) remote sensing can provide an alternative. This paper explores the potential of using UAV-derived remotely sensed data for identifying plucking areas of tea plantations. In particular, four classification models were built based on different UAV data (optical imagery,

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Gering, Lawrence R., and Dennis M. May. "Point-Sampling of Tree Crowns Using Aerial Photographs for Forest Inventory." Southern Journal of Applied Forestry 21, no. 1 (1997): 28–36. http://dx.doi.org/10.1093/sjaf/21.1.28.

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Abstract Aerial-photo angle-gauges were designed and constructed for developing a procedure for using variable-radius plot sampling for forest inventory of natural stands in Hardin and Wayne Counties, Tennessee. Data were obtained during the 1989 USDA Southern Forest Experiment Station survey of the forests of Tennessee, with supplemental aerial photographic measurements. Photo-based cruises of the two counties were made on 9 x 9 in. color aerial photographs (with a nominal scale of 1:4,800) taken during the fall color season. Photo cruises were compared to traditional ground-based cruises, an

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Thompson, Michael T. "Analysis of Conifer Mortality in Colorado Using Forest Inventory and Analysis's Annual Forest Inventory." Western Journal of Applied Forestry 24, no. 4 (2009): 193–97. http://dx.doi.org/10.1093/wjaf/24.4.193.

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Abstract Aerial detection surveys indicate that widespread conifer mortality has been steadily increasing in Colorado, particularly since 2002. The Forest Inventory and Analysis (FIA) annual inventory system began in Colorado in 2002, which coincided with the onset of elevated conifer mortality rates. The current mortality event coupled with collection of 6 years of annual inventory data provided an opportunity to test the usefulness of the FIA annual inventory system for quantifying rapid change in the conifer resource over a large geographic area. The estimate of conifer mortality during the

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Virtue, Jacob, Darren Turner, Guy Williams, Stephanie Zeliadt, Matthew McCabe, and Arko Lucieer. "Thermal Sensor Calibration for Unmanned Aerial Systems Using an External Heated Shutter." Drones 5, no. 4 (2021): 119. http://dx.doi.org/10.3390/drones5040119.

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Uncooled thermal infrared sensors are increasingly being deployed on unmanned aerial systems (UAS) for agriculture, forestry, wildlife surveys, and surveillance. The acquisition of thermal data requires accurate and uniform testing of equipment to ensure precise temperature measurements. We modified an uncooled thermal infrared sensor, specifically designed for UAS remote sensing, with a proprietary external heated shutter as a calibration source. The performance of the modified thermal sensor and a standard thermal sensor (i.e., without a heated shutter) was compared under both field and temp

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Gering, Lawrence R., and Dennis M. May. "The Relationship of Diameter at Breast Height and Crown Diameter for Four Species Groups in Hardin County, Tennessee." Southern Journal of Applied Forestry 19, no. 4 (1995): 177–81. http://dx.doi.org/10.1093/sjaf/19.4.177.

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Abstract A set of simple linear regression models for predicting diameter at breast height (dbh) from crown diameter and a set of similar models for predicting crown diameter from dbh were developed for four species groups in Hardin County, TN. Data were obtained from 557 trees measured during the 1989 USDA Southern Forest Experiment Station survey of the forests of Tennessee, with supplemental aerial photographic observations. Estimates of individual tree crown diameter were obtained from ground measurements and from measurements made on 9 X 9 in. color aerial photographs (with nominal scale

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Machimura, Takashi, Ayana Fujimoto, Kiichiro Hayashi, Hiroaki Takagi, and Satoru Sugita. "A Novel Tree Biomass Estimation Model Applying the Pipe Model Theory and Adaptable to UAV-Derived Canopy Height Models." Forests 12, no. 2 (2021): 258. http://dx.doi.org/10.3390/f12020258.

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Aiming to develop a new tree biomass estimation model that is adaptable to airborne observations of forest canopies by unmanned aerial vehicles (UAVs), we applied two theories of plant form; the pipe model theory (PMT) and the statical model of plant form as an extension of the PMT for tall trees. Based on these theories, tree biomass was formulated using an individual tree canopy height model derived from a UAV. The advantage of this model is that it does not depend on diameter at breast height which is difficult to observe using remote-sensing techniques. We also proposed a treetop detection

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