Proceedings, XXth congress: Proceedings, XXth congress

Altan, M. Orhan

Bibliographic data

Multivolume work

Persistent identifier:: 1663674213

Title:: Proceedings, XXth congress

Sub title:: Istanbul, 12 - 23 July 2004

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1663674213

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.; Auch bezeichnet als XXth International Congress for Photogrammetry and Remote Sensing

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Document type:: Multivolume work

Volume

Persistent identifier:: 166368779X

Title:: Proceedings, XXth congress

Scope:: IV, 226 Seiten

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 166368779X

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(35,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: INTEGRATED DEM AND PAN-SHARPENED SPOT-4 IMAGE IN URBAN STUDIES G. Doxani, A. Stamou

Document type:: Multivolume work

Structure type:: Chapter

2004 jde, tho- lave red The een ated g at be 1ber the ) of del. ‘the atic hod and and such ural 989, note INTEGRATED DEM AND PAN-SHARPENED SPOT-4 IMAGE IN URBAN STUDIES G. Doxani, A. Stamou Dept. Cadastre, Photogrammetry and Cartography, Aristotle University of Thessaloniki, GREECE gdoxani@hotmail.com, katerinoudi@hotmail.com Youth Forum KEY WORDS: Remote Sensing, SPOT Satellite images, DEM, orthorectification, fusion, urban, 3D visualization ABSTRACT: Digital orthoimages are becoming increasingly of interest as they provide up-to-date information for a wide range of applications. Facing the need for accurate spatial information this paper aims to the production of orthoimages and their further processing, as well as to the three dimensional visualization of the resulting images. The data used are one panchromatic image from Spot-3, with spatial analysis 10 m, and one multispectral from Spot-4, with spatial analysis 20 m. Both images depict the city of Thessaloniki, in Greece. In order to eliminate distortions arising from the topographic relief and improve the accuracy of orthoimages, a DTM (Digital Terrain Model) of the same area with grid size of 25 meters was used. It should be noted that the ground control points were collected by GPS measurements and two orthophotos, which were produced from 1:10,000 and 1:20,000 aerial photos. Furthermore, the panchromatic orthoimage and the multispectral orthoimage were fused with the methodology of principal components analysis. Prior to the fusion process, the registration of the image with the lower spatial analysis (the multispectral) on the image with the higher spatial analysis (the panchromatic) was necessary. In order to analyze the reliability and the accuracy of the spectral and spatial information of the synthetic image an evaluation was accomplished based on statistical tests. Additionally, supervised classification was made in the synthetic image and its accuracy was evaluated. Finally, a panoramic video was created which included a supervised flight through the area of interest for the virtual representation of the anaglyph. 1. INTRODUCTION beginning, choosing the 7 most important land cover and use of the area of interest. As the demand for digital products is getting bigger, the digital orthoimages are becoming more and more popular these days. Finally the 2D and 3D image data are elaborated with a view to Once the orthoimages are free from distortions arising from the produce various forms of visualization. topographic relief, they are more accurate and could be used diversely. 2. DATA In order to eliminate geometric distortions of the images obtained by satellites is essential to alter their geometric form. The used data are one panchromatic image from Spot-3, with This is accomplished through the process of geometric spatial analysis 10 m and one multispectral from Spot-4, with correction by using one geometric model, in this case the Spot spatial analysis 20 m. Both images depict the city of geometric model. The result is the registered digital image. Thessaloniki, in Greece. Also a DTM (Digital Terrain Model) Subsequently, the resampling of the registered image, which of the same area with grid size of 25 meters is used. calculates the new pixel values with the method of bicubic interpolation, is necessary for the production of the orthoimage. Ground control points collected by GPS measurements and two After this procedure the central perspective image is orthophotos, which were produced from 1:10,000 and 1:20,000 transformed into an orthogonal projection. aerial photos. To broaden the uses of orthoimages with different radiometric, For the development of this paper is used the software of the geometric and spectral characteristics, is important to fuse all Erdas Imagine 8.5. this information and produce a synthetic image. A synthetic image combines the spatial resolution of the high spatial analysis image and the spectral resolution of the one with the high spectral analysis. Its characteristics make possible the full exploitation of the image data. Additionally, from the classical cartographic point of view, is considered essential the classification of the image pixels into different types of classes, representing specific kinds of land. The result of this procedure is a thematic map, which provides useful information. In this paper, with the method of supervised classification, the types of classes were determined from the 139

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