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Dissertations / Theses on the topic 'Raster-based'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Siwela, Blessing. "Web-based management of time-series raster data." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/6441.

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Data discovery and data handling often presents serious challenges to organizations that manage huge archives of raster datasets such as those generated by satellite remote sensing. Satellite remote sensing produces a regular stream of raster datasets used in many applications including environmental and agricultural monitoring. This thesis presents a system architecture for the management of time-series GIS raster datasets. The architecture is then applied in a prototype implementation for a department that uses remote sensing data for agricultural monitoring. The architecture centres on thre

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Koehler, Richard Bruce. "Raster-based analysis and visualization of hydrologic time-series." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280516.

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Annual, seasonal, and daily discharge patterns determine many of the physical and biological properties of a stream. Natural short- and long-term variation of streamflow is part of the normal processes of a river or stream whereas artificial short- and long-term fluctuations can disrupt the natural processes of a river. It is critical to recognize and identify such artificial fluctuations and disturbances to have a more complete understanding of river systems. This understanding can be used to modify current management efforts to achieve more natural flow regimes. A new procedure using dual-ti

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3

Mayers, Margaret Grace. "A study of four raster-based data generalization procedures." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/40979.

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Strategies for generalizing raster-based land cover data were investigated. Generalization strategies were studied as part of the U.S. Geological Survey's (USGS) Federal Land Information System (FLIS). Area filtering, category aggregation, resampling, and modal search and replace comprised the strategies tested on USGS Alaska Interim Land Cover data. Generalization of the land cover data was deemed necessary for two reasons: 1) reduction in the volume of homogeneous land cover regions required for computer memory storage, and 2) simplification of the highly complex land cover map. The gener

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4

Alexander, Julie G. "Hydrographic Surface Modeling Through A Raster Based Spline Creation Method." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1842.

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The United States Army Corp of Engineers relies on accurate and detailed surface models for various construction projects and preventative measures. To aid in these efforts, it is necessary to work for advancements in surface model creation. Current methods for model creation include Delaunay triangulation, raster grid interpolation, and Hydraulic Spline grid generation. While these methods produce adequate surface models, attempts for improved methods can still be made. A method for raster based spline creation is presented as a variation of the Hydraulic Spline algorithm. By implementing Hyd

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5

Edwards, Aron Shaun. "Raster based coastal marsh classification within the Galveston Bay ecosystem, Texas." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2592.

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6

Yu, Jinsongdi [Verfasser]. "Towards a Specification-based Quality Guarantee for Geo Raster Web Services / Jinsongdi Yu." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2012. http://d-nb.info/1035219662/34.

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7

Niesterowicz, Jacek. "Unsupervised pattern-based regionalization of large multi-categorical raster maps using machine vision methods." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1490351367846515.

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8

Burgholzer, Robert William. "Using Accumulation Based Network Identification Methods to Identify Hill Slope Scale Drainage Networks in a Raster GIS." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32001.

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The simple accumulation-based network identification method (ANIM) in a raster Geographic Information System (GIS) posed by Oâ Callaghan and Mark (1984) has been criticized for producing a spatially uniform drainage density (Tarboton 2002) at the watershed scale. This criticism casts doubt on the use of ANIMs for deriving properties such as overland flow length for nonpoint source pollution models, without calibrating the accumulation threshold value. However, the basic assumption that underlies ANIMs is that convergent topography will yield a more rapid accumulation of cells, and thus, mor

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9

Wang, Huan. "A Large-scale Dynamic Vector and Raster Data Visualization Geographic Information System Based on Parallel Map Tiling." FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/550.

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With the exponential increasing demands and uses of GIS data visualization system, such as urban planning, environment and climate change monitoring, weather simulation, hydrographic gauge and so forth, the geospatial vector and raster data visualization research, application and technology has become prevalent. However, we observe that current web GIS techniques are merely suitable for static vector and raster data where no dynamic overlaying layers. While it is desirable to enable visual explorations of large-scale dynamic vector and raster geospatial data in a web environment, improving the

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10

Duerksen, Joel L. "A comparative analysis of the performance of floating point and integer based line drawing algorithms for raster displays." Virtual Press, 1988. http://liblink.bsu.edu/uhtbin/catkey/544005.

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In order to predict and analyze the performance of both floating point and integer line drawing algorithms the performance of individual instructions is examined. A select group of line drawing algorithms are implemented and timed in performance tests. An algorithms accuracy is observed along with its performance in three tests. These tests are performed on five computers for comparison. The effects of utilizing the standard code optimizer is included as an integral part of the research.<br>Department of Computer Science

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11

Basnet, Badri Bahadur. "Geographic Information System based manure application planning." University of Southern Queensland, Faculty of Engineering and Surveying, 2002. http://eprints.usq.edu.au/archive/00001410/.

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[Abstract]: The disposal of animal waste has become a problem in many parts of the world due to the rapid growth in the number and the size of intensive animal industries. Safe waste disposal sites are rarely available and the relocation and/or treatment of animal waste is seldom economically viable. The reuse of animal waste for energy recovery and re-feeding is also not popular. Animal waste is a valuable source of plant nutrients and a very good soil conditioner, and has been commonly applied as fertiliser to agricultural fields. However, due to the increasing oversupply of animal waste in

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12

Lo, Shin-en. "A Fire Simulation Model for Heterogeneous Environments Using the Level Set Method." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/cgu_etd/72.

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Wildfire hazard and its destructive consequences have become a growing issue around the world especially in the context of global warming. An effective and efficient fire simulation model will make it possible to predict the fire spread and assist firefighters in the process of controlling the damage and containing the fire area. Simulating wildfire spread remains challenging due to the complexity of fire behaviors. The raster-based method and the vector-based method are two major approaches that allow one to perform computerized fire spread simulation. In this thesis, we present a scheme we h

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13

Syphard, Alexandra Dunya. "A raster-based GIS analysis of the cumulative impacts of humans and beaver on wetland area and types in the Chickahominy River watershed (Virginia, USA) from 1953 to 1994." VCU Scholars Compass, 1998. https://scholarscompass.vcu.edu/etd/5538.

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Despite increased recognition of wetland functions and values, wetland loss and degradation continues in the United States. Digital wetlands and uplands coverages were analyzed to compare the cumulative impacts of humans and beaver (Castor canadensis) on wetland types in the Chickahominy River watershed (Virginia, USA) from 1953 to 1994. A vector-based approach was used for data manipulation, and a raster-based approach was chosen to analyze geographic change over time. Study findings indicated that anthropogenic activities were responsible for both wetland loss and gain in the watershed, and

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14

Seegmiller, Lindsi. "Modeling and optimization of least-cost corridors." Licentiate thesis, KTH, Geoinformatik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291279.

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Given a grid of cells, each having a value indicating its cost per unit area, a variant of the least-cost path problem is to find a corridor of a specified width connecting two termini such that its cost-weighted area is minimized. A computationally efficient method exists for finding such corridors, but as is the case with conventional raster-based least-cost paths, their incremental orientations are limited to a fixed number of (typically eight orthogonal and diagonal) directions, and therefore, regardless of the grid resolution, they tend to deviate from those conceivable on the Euclidean p

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Wu, Ying. "COTS GIS integration and its SOAP-based web services." ScholarWorks@UNO, 2004. http://louisdl.louislibraries.org/u?/NOD,99.

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Thesis (M.S.)--University of New Orleans, 2004.<br>Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Computer Science."--Thesis t.p. Vita. Includes bibliographical references.

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16

Gumos, Aleksander Karol. "Modelling the Cross-Country Trafficability with Geographical Information Systems." Thesis, Linköping University, Department of Computer and Information Science, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-313.

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<p>The main objectives of this work were to investigate Geographical Information Systems techniques for modelling a cross-country trafficability. To accomplished stated tasks, reciprocal relationships between the soil deposits, local hydrology, geology and geomorphology were studied in relation to the study area in South-Eastern Sweden.</p><p>Growing awareness of nowadays users of GIS in general is being concentrated on understanding an importance of soil conditions changed after cross-country trafficability. Therefore, in this thesis, constructing of the Soil Knowledge Database introduced to

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17

Poulsen, Henrik. "Potential of GPU Based Hybrid Ray Tracing For Real-Time Games." Thesis, Blekinge Tekniska Högskola, Avdelningen för för interaktion och systemdesign, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3488.

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The development of Graphics Hardware Technology is blazing fast, with new and more improved models, that out spec the previous generations with leaps and bounds, before one has the time to digest the potential of the previous generations computing power. With the progression of this technology the computer games industry has always been quick to adapt this new power and all the features that emerge as the graphic card industry learn what the customers need from their products. The current generations of games use extraordinary visual effects to heighten the immersion into the games, all of whi

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18

Ollinger, Christoph German Josef. "A waveguide-based lens-less x-ray microscope." Doctoral thesis, [S.l.] : [s.n.], 2006. http://webdoc.sub.gwdg.de/diss/2006/ollinger.

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19

Gupta, Amar. "Grid based raster selection and vector extraction /." 2006. http://digital.library.okstate.edu/etd/umi-okstate-2054.pdf.

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20

Lin, Hong Yue, and 林宏嶽. "Raster based spatial analysis for landfill siting." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/94555035991486337805.

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21

Chih, Pin-shen, and 池品軒. "Automatically Vectorizing Raster Image based on Diffusion Curves." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/82900629675918303069.

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碩士<br>國立交通大學<br>資訊科學與工程研究所<br>102<br>Diffusion curve is a novel vector-based primitive. It partitions the space through which it is drawn and define colors on each side. These colors smoothly diffuse outwards from each side until they cover the entire image. In this thesis, we propose a method to automatically vectorize a raster image. Our method extracts the contour, color and blur attribute from the raster image, and represents the raster image by the geometry primitives of diffusion curves. The vector graphics, which is represented by a set of diffusion curves closely approximates the origi

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22

王啟凱. "A Study of a Raster-Based Geographical Information System Combined with Object-oriented Database." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/06509365117472172749.

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碩士<br>國防管理學院<br>資源管理研究所<br>85<br>Geographical information system (GIS) has already been considered as an important tool in military or civilian applications. Less integration and disagreement with the real world are the relational database's shortages. The objective of this research is to develop a GIS based on the Gargantini's linear quadtree coding scheme with the object-oriented (OO) analysis and design concept. The Dorado, an object-oriented database management system (OODBMS), is applied to implement the proposed GIS. 　　The Gargantini's linear quadtree coding scheme has advantages of simp

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23

Li, Ming-Ju, and 李明儒. "A sensitivity analysis of raster-based land use change model in multi spatial scales." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/03700055123623407803.

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碩士<br>國立臺灣大學<br>建築與城鄉研究所<br>96<br>There are many kinds of factors to impact on the land use pattern, because of it’s complicating interactive process, in recent years, many researchers expected to explain the process of environmental dynamic changes by finding the driving forces of land use or land cover change. In many land use change studies or simulations, most of researchers will convert vector data to raster data format, using the regular grid to be a basic unit for analyzing and simulating. At this time, grid is a basic unit to represent spatial information, it means when we chose the b

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24

Hsu, Chien-Liang, and 徐建樑. "Location Selection Using Raster-based GIS : A Study on Siting Mobile Phone Base Stations." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/gfckhv.

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碩士<br>朝陽科技大學<br>建築及都市設計研究所<br>93<br>With the advent of mobile communication technology, the adoption rate of mobile phone in Taiwan is said to be over 80% of its population. Because of the basic requirement to offer good communication quality, the mobile phone system providers are constantly siting base stations as needed in order to provide enough signal coverage and strength. This research first discusses those issues related to siting mobile phone base stations, such as the location, the quantity, the radio signal coverage, the channel capacity of each base station, etc. It then uses the

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25

Liu, Hsiao-Yun, and 劉曉芸. "Investigating the Impact of Land Use Changes on Groundwater Recharge Using Raster Based Geographic Information System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/98naje.

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碩士<br>國立交通大學<br>土木工程系所<br>104<br>The groundwater, providing fresh water for 1/3 of total water demand in Taiwan, is an important fresh water resource. Proper management is critical for sustainable use of the groundwater. Simulation models have been intensively used for the water resources evaluation. One of the most important factor is the groundwater recharge volume. This study uses python to develop a groundwater recharge evaluation platform which combines PCRaster software with raster-type data of land use, soil information, rainfall, etc. This platform is applied to estimate the groundwate

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Risinger, Emily Diane. "Defining GeoDesign and the emergent role of the sustainable sites initiative (SITES) for integrative project management." Thesis, 2012. http://hdl.handle.net/2152/29161.

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This report is a discussion of the multifarious applications of the modern day geographic information system and how the universal merit of the technology across disciplines has led to the emergence of GeoDesign. The purpose of this Master’s Professional Report was to retrace the core conceptual framework and landmark events occurring in the evolution GIS technology, and how these factors have led to recent creation of new performance based rating systems and evidence-based design techniques. The Sustainable Sites Initiative (SITES), a new performance based rating system that has emerged in re

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