Cutline Test Images

Exporting an GeoTiff-Image from a Raster Coverage

--> 'List of Sql-Commands'

<-- 'Index Page for RasterLite2 - Commands'

<-- 'Cutline Index'

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For the cutline logic, the following 2 images are being used for testing

• the result of is shown here --> 'Cutline-Images'

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1927 Area of Eiskeller, Berlin-Spandau, Falkensee, Brandenburg

• these are 2 maps of the 1:4000 series (4366 and **4365)
• taken together, both maps correspond to today's 1:5000 map (436B)
• the original images was downloaded from the WMS-Server of
  • HistoMap Berlin
• These images were then (re) georeferenced with a 2010 version the 436B map
  • in the QGIS image below, shown as the red lines
• The geometry is based on the property found on the 2010 version the 436B map
  • the city district of Spandau around 1928
    • which is a MULTIPOLYGON
      • one POLYGON being the main district (Upper/Right hand area)
        • with 5 interior rings (enclaves)
          • 3 of which can be seen here
      • 6 POLYGON's being exclaves
        • one of which can be seen here (Lower/Right)

The goal of the 'Cutline option' will be to show:

• main POLYGON portion
  • with the 3 enclaves being transparent
• the second POLYGON
  • which will be surrounded as a transparent area

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1927 Area of Teufelsbruch, Eiskeller, Berlin-Spandau

• shows the area to be ['cutout'] (Cutline-Images#teufelsbruch):
  • main POLYGON portion
    • which is only connected by a slim path
  • the 3 enclaves
    • with only the northern portion of the third being shown

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When the Cutline option is used

• looks like this --> 'Cutline-Images'

<-- 'Cutline Index'

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2015-10-13: Mark Johnson, Berlin Germany

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