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Production of digital orthophoto for “Geographic Information System for Mine Action”

Production of digital orthophoto for “Geographic Information System for Mine Action”. 2nd Workshop of SEEMACC GIS GROUP in ITF Slovenia. M.Sc. Vasja Bric, Geodetski zavod Slovenije d.d. Contents. project organisation overview of the project statistics of the project problems and solutions

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Production of digital orthophoto for “Geographic Information System for Mine Action”

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  1. Production of digital orthophoto for “Geographic Information System for Mine Action” 2nd Workshop of SEEMACC GIS GROUP in ITF Slovenia M.Sc. Vasja Bric, Geodetski zavod Slovenije d.d.

  2. Contents • project organisation • overview of the project • statistics of the project • problems and solutions • results • future improvements V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  3. Project organisation • Aerial photography of the area (GZS) • Planning of ground control points (GZS) • Marking, measurement, computation and transformation of GCPs (BHMAC) • Orthophoto production (GZS) (scanning, aerialtriangulation, DTM, orthophoto computation, mosaicing, finalisation) V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  4. Overview of the project • Two areas: • Lašva 1:2500 and 1:1000 (same area) • Pelagičevo 1:2500 • Scale of aerial survey: • map scale 1:2500 - photo scale 1:12500 • map scale 1:1000 - photo scale 1:5000 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  5. Lašva 1:2500 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  6. Lašva 1:1000 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  7. Pelagičevo 1:2500 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  8. Statistics V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  9. Problems and solutions • marking of GCPs • measurements of natural detail • GCP accuracy • GSD (1 pixel on the ground) • 1:2500 (2.25x1.5 km) if GSD is 0.10m 338 MB • 1:1000 (0.75x0.5 km) if GSD is 0.05m 150 MB V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  10. Natural detail for a GCP V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  11. Results • Orthophoto • Number of sheets: • Lašva 1:2500 84 (x 338 MB is 28.4 GB) • Lašva 1:1000 128 (x 150 MB is 19.2 GB) • Pelagičevo 1:2500 134 (x 338 MB is 45.3 GB) • DTM (grid, characteristic lines and spot heights) V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  12. Orthophoto Lašva 1:1000 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  13. Orthophoto Lašva 1:1000 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  14. Orthophoto Lašva 1:1000 V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  15. DTM V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

  16. Future improvements • planning all activities (time of aerial survey) • planning of aero-triangulation • marking of GCPs and measurements • aerial survey • additional field work (missing GCPs) • transformation parameters from governmental to WGS84 system V.Bric, GZS d.d. 2nd Workshop of SEEMACC GIS GROUP

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