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:: COMBINATION OF SATELLITE IMAGE PAN IKONOS - 2 WITH GPS IN CADASTRAL APPLICATIONS K. Christodoulou, M. Tsakiri-Strati

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 Figure 3. The panchromatic orthoimage using control points measured with GPS. 4. ACCURACY ESTIMATION OF THE TWO ORTHOIMAGES 4.1. Required accuracy from the Hellenic Cadastre Project As it is known the technical specifications of the Hellenic Cadastre fixes bearable limits for horizontal and vertical accuracy rise up to two (Technical specifications of Hellenic Cadastre Project, 1999) (Arvanitis A., 2000). In order to achieve accuracy control the technical specifications demand the coordinates’ comparison of certain characteristic points in the orthoimage with the coordinates that were received with any method (digitalization, GPS). The map accuracy is expressed by variance o^, or the Root Mean Square error of the points' coordinates, that was calculated (Patias P., 2001): e From the n points' horizontal coordinates 5 ] 2 ~ 5 ~ ” e e o tns 2n t7 (1) 1 $ > / > 2 Ó C Gr = & = x, ) T (v; "xdi ¥ 2n ^7 e From the n points heights Î n 2 2 Ó f —- = 2 o ver = S. (z i z i ) (2) n ja Where X ; y ? s : = the values of control points’ coordinates in the orthoimage X. Vi ZZ, Me corresponding topographic control 1 values. O0 2 : A : Ox; ; Óy ; * the coordinates" residuals N= the number of points for the accuracy control 2 2 Q noc — the variances' estimation for the horizontal > ver and vertical control Before the value o becomes acceptable, the values dxi, dyi are checked for probably gross errors applying data snooping control: ÓX;, y; « 1.96 Ohor (3) 02; $2.16 0. (4) The percentage of the rejected values resultant from the application of this control should not exceed the 5% of total values. After the rejection of the off limits deviations the root mean square error of the remaining points is calculated and the global test takes place. The value o is checked with the help of the reference variance. The prices o,, which come in this case from the technical specifications of the Hellenic Cadastre (oy, Kat 607), depending on the scale, are given for the coordinates x, yz. e For horizontal accuracy: Gun 0 9264 22 096,0 (5) x e For vertical accuracy: Lnd Over £0980, — 0.96, 1 (6) Accordingly to the statistics if the inequalities are valid, the estimation of accuracy that was calculated is oxy-2m and o07-2m by tacking into consideration the technical specifications of the Hellenic Cadastre about o, as well. 4.2. Orthoimage's accuracy estimation that was produced with the method of digitization Nine points were used for the accuracy control, which were distributed in the total of region. The points' coordinates were received from ortoimage and they were compared with the coordinates that were received by the digitization of surveying diagram in scale 1:5000. After calculations it was calculated that 6,,,=1,245m and 6,.,=0.412m for the nine points. The data snooping control for gross errors in the nine control points accomplished successfully. There was no necessity to reject any point because of the type: 0X;,0y;<1.960},,,=2.44m (7) As well as the type: 02;<2.160,,=0.89m (8) Continuously a total accuracy control was applied, where the following type should be verified: Gu 50.92 exy cx 0.9 oy (9) As well as the type 0.20.9980, 2 090, (10)

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