RL2_LoadRasterFromDir

Filling a Raster Coverage with Geo-Referenced Image-Files stored in a specific directory

--> 'List of Sql-Commands'

<-- 'Index Page for RasterLite2 - Commands'

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Original Documentation [RasterLite2 SQL functions - reference list)[(https://www.gaia-gis.it/fossil/librasterlite2/wiki?name=sql_reference_list)

• RL2_LoadRasterFromDir(text coverage, text dir_path, text file_ext, int with_worldfile, int force_srid, int pyramidize, int transaction)

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Parameters [optional parameters]:

• coverage: chosen name of raster_coverage
• dir_path: directory where the files to be loaded are stored
• file_ext: file extension of the files in the directory to be loaded
• [with_worldfile]: (0= if geotiff, 1= if worldfile)
• [force_srid]: (0= if geotiff, 1= if worldfile)
  • world files have no srid support build in
    • this value will set the srid to be used
  • geotiff, without a world file
    • will ignore this value (can be 0)
• [pyramidize]: calls RL2_Pyramidize (not RL2_PyramidizeMonolithic)
• [transaction]:

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• Sample for a GeoTiff
  • without a world-file

SELECT RL2_LoadRastersFromDir
(
 -- chosen name of raster_coverage
 'dritte_landesaufnahme_toscana_dir', 
  -- directory where the files to be loaded are stored
 '../Dritte_Landesaufnahme.Toscana',
 -- file extension of the files in the directory to be loaded
 '.tif'
);

The result in QGIS then looks like this

• background: 1861 map of Northern Italy
• geometries: presen day borders of the Toscanna
• Geotiff : 1904-12 maps in the directory Dritte_Landesaufnahme.Toscana

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2015-09-01: Mark Johnson, Berlin Germany

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