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Title:METODE ZA PRIKAZ SATELITSKIH POSNETKOV
Authors:ID Mikša, Renato (Author)
ID Žalik, Borut (Mentor) More about this mentor... New window
Files:.pdf UNI_Miksa_Renato_2010.pdf (3,66 MB)
MD5: D3EB78211EC4AA2C570EF4143B3C6C0C
PID: 20.500.12556/dkum/2d4dcdab-0330-468b-929a-b15efcdbfe0c
 
Language:Slovenian
Work type:Undergraduate thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Tehnologija RADAR je omogoča opazovanje objektov na daljavo, ki temelji na obsevanju objektov z radijskim signalom. Oddaljenost od objekta je določena z meritvijo časovnega zamika med oddajanjem signalnega impulza in zaznavo njegovega odboja medtem, ko nadaljnja analiza odbitega signala omogoča določanje lastnosti oddaljenega objekta. V okviru tega diplomskega dela obravnavamo podatke o zemeljskem površju, zbrane s pomočjo sistema RADAR nameščenim na satelit. Na ta način je mogoč hiter zajem podatkov iz velikega geografskega območja z visoko natančnostjo in ločljivostjo. Ker obseg takšnih podatkov hitro preraste zmogljivosti sodobnih računalniških sistemov, se moramo pri njihovi obdelavi posluževati različnih optimizacijskih tehnik za delo z veliko količino podatkov. V tem diplomskem delu predstavimo različne tehnike podvzorčenja podatkov, ki zmanjšajo računsko in prostorsko zahtevnost njihove upodobitve. Ker pri tem postopki izgubimo tudi nekatere pomembne detajle, je analiza rezultatov usmerjena v ocenitev napake, ki jo povzroči uporaba posamične tehnike. Učinkovitost predstavljenih postopkov prikažemo na primeru podatkov zbranih s pomočjo satelita TerraSAR-X.
Keywords:Računalništvo, satelitski posnetki, vizualizacija, GeoServer, TIFF, GeoTIFF, podvzorčenje.
Place of publishing:Maribor
Publisher:[R. Mikša]
Year of publishing:2010
PID:20.500.12556/DKUM-17088 New window
UDC:004.925.8(043.2)
COBISS.SI-ID:14987030 New window
NUK URN:URN:SI:UM:DK:XAJEI5CD
Publication date in DKUM:12.01.2011
Views:2050
Downloads:166
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Secondary language

Language:English
Title:METHODS FOR VISUALIZATION OF SATELLITE DATA
Abstract:RADAR technology allows fast capture of geometric data from large geographic areas with high accuracy and resolution. Such remote sensing is based on emitting the radio signal onto distant objects. The distance from the object is determined by measuring the time delay between the emitted signal pulse and the detection of its reflection, while further signal analysis allows determination of distant objects’ properties. In the scope of this diploma work we deal with Earth’s surface data collected by satellite based RADAR systems. As the scope of such data can quickly exceed the capabilities of modern computer systems, we need to apply optimization techniques for dealing with large amounts of data. In this diploma work we present various techniques for downsampling that reduce memory and computational workload for data processing. As the methods reduce important details, the result analysis is focused on error evaluation as well. The efficiency of the presented methods is shown on an example of data collected by the TerraSAR-X satellite.
Keywords:Computer Science, Satellite images, visualization, GeoServer, TIFF, GeoTIFF, down sampling.


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