[GRASS-dev] limits of r.patch

[Helmut Kudrnovsky]

>>what says gdalinfo about ASTGTM_N33E000_dem_lzw.tif?
>
>oh, I've meant:  gdalinfo mosaic.vrt   

tested here now with some aster-tiles:

C:\data\gisdata\asterdem\Tiles_201102121133>gdalinfo asterdem.vrt
Driver: VRT/Virtual Raster
Files: asterdem.vrt
      
C:\data\gisdata\asterdem\Tiles_201102121133\ASTGTM_N42E006\ASTGTM_N42E006
\ASTGTM_N42E006_dem.tif
      
C:\data\gisdata\asterdem\Tiles_201102121133\ASTGTM_N43E004\ASTGTM_N43E004
\ASTGTM_N43E004_dem.tif
      
C:\data\gisdata\asterdem\Tiles_201102121133\ASTGTM_N43E005\ASTGTM_N43E005
\ASTGTM_N43E005_dem.tif
Size is 10801, 7201
Coordinate System is:
GEOGCS["WGS 84",
    DATUM["WGS_1984",
        SPHEROID["WGS 84",6378137,298.257223563,
            AUTHORITY["EPSG","7030"]],
        AUTHORITY["EPSG","6326"]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433],
    AUTHORITY["EPSG","4326"]]
Origin = (3.999861111111111,44.000138888888891)
Pixel Size = (0.000277777777778,-0.000277777777778)
Corner Coordinates:
Upper Left  (   3.9998611,  44.0001389) (  3d59'59.50"E, 44d 0' 0.50"N)
Lower Left  (   3.9998611,  41.9998611) (  3d59'59.50"E, 41d59'59.50"N)
Upper Right (   7.0001389,  44.0001389) (  7d 0' 0.50"E, 44d 0' 0.50"N)
Lower Right (   7.0001389,  41.9998611) (  7d 0' 0.50"E, 41d59'59.50"N)
Center      (   5.5000000,  43.0000000) (  5d30' 0.00"E, 43d 0' 0.00"N)
Band 1 Block=128x128 Type=Int16, ColorInterp=Gray

linking with r.external also works here:

r.info map=asterdemlinked at asterdem                                              

+----------------------------------------------------------------------------+
 | Layer:    asterdemlinked at asterdem        Date: Tue Jul 17 16:44:24 2012   
|
 | Mapset:   asterdem                       Login of Creator: myricaria      
|
 | Location: uwdwgs84                                                        
|
 | DataBase: \grassdata                                                      
|
 | Title:     ( asterdemlinked )                                             
|
 | Timestamp: none                                                           
|

|----------------------------------------------------------------------------|
 |                                                                           
|
 |   Type of Map:  raster               Number of Categories: 0              
|
 |   Data Type:    CELL                                                      
|
 |   Rows:         7201                                                      
|
 |   Columns:      10801                                                     
|
 |   Total Cells:  77778001                                                  
|
 |        Projection: Längen- und Breitengrad                                
|
 |            N: 44:00:00.5N    S: 41:59:59.5N   Res: 0:00:01                
|
 |            E: 7:00:00.5E    W: 3:59:59.5E   Res: 0:00:01                  
|
 |   Range of data:    min = 0  max = 642                                    
|
 |                                                                           
|
 |   Data Description:                                                       
|
 |    generated by r.external                                                
|
 |                                                                           
|
 |   Comments:                                                               
|
 |    r.external input="C:\data\gisdata\asterdem\Tiles_201102121133\asterd\  
|
 |    em.vrt" output="asterdemlinked"                                        
|
 |                                                                           
|

+----------------------------------------------------------------------------+



-----
best regards
Helmut
--
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