I'm not a professional in geotiff/gdal , but it seems that your maps are
not georeferenced.
"Coordinate System is `' " should contain a valid value.
You can check with gdalinfo, if your input tifs are ok.
Maybe they have no or different systems.
Your can find out, which CRS your source maps should contain and add a
system with gdalwarp.
See https://gdal.org/programs/gdalwarp.html
Sample: gdalwarp -t_srs EPSG:4326 input.tif output.tif But as mentioned before I'm not very fimilar with it. Good
luck! KR Axel
Am 21.04.21 um 10:54 schrieb John Groombridge:
On 21/04/21 8:25 pm, APM wrote:
maybe you can try to get more information with gdalinfo Map.vrt
Whow, that was quick. Thank you Axel
gdalinfo WELLINGTONarea.vrt:
Driver: VRT/Virtual Raster
Files: WELLINGTONarea.vrt
/home/sdc4/GeoMaps/Featherston_BP33_GeoTifv1-08.tif
/home/sdc4/GeoMaps/Kapiti_BN32pt_GeoTifv1-06.tif
/home/sdc4/GeoMaps/LakeWairarapa_BQ33_GeoTifv1-05.tif
/home/sdc4/GeoMaps/LowerHutt_BQ32_GeoTifv1-08.tif
/home/sdc4/GeoMaps/Paraparaumu_BP32_GeoTifv1-09.tif
/home/sdc4/GeoMaps/Wellington_BQ31_GeoTifv2-04.tif
Size is 17010, 22678
Coordinate System is `'
Origin = (1731997.883333333302289,5502002.116666666232049)
Pixel Size = (4.233333333333330,-4.233333333333330)
Corner Coordinates:
Upper Left ( 1731997.883, 5502002.117)
Lower Left ( 1731997.883, 5405998.583)
Upper Right ( 1804006.883, 5502002.117)
Lower Right ( 1804006.883, 5405998.583)
Center ( 1768002.383, 5454000.350)
Band 1 Block=128x128 Type=Byte, ColorInterp=Red
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=138.955, StdDev=100.317
Metadata:
STATISTICS_APPROXIMATE=YES
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=138.95493788032
STATISTICS_MINIMUM=0
STATISTICS_STDDEV=100.31731040258
STATISTICS_VALID_PERCENT=100
Band 2 Block=128x128 Type=Byte, ColorInterp=Green
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=145.367, StdDev=102.848
Metadata:
STATISTICS_APPROXIMATE=YES
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=145.36712569726
STATISTICS_MINIMUM=0
STATISTICS_STDDEV=102.84783150571
STATISTICS_VALID_PERCENT=100
Band 3 Block=128x128 Type=Byte, ColorInterp=Blue
Min=0.000 Max=255.000
Minimum=0.000, Maximum=255.000, Mean=131.932, StdDev=107.121
Metadata:
STATISTICS_APPROXIMATE=YES
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=131.93187872401
STATISTICS_MINIMUM=0
STATISTICS_STDDEV=107.12126613018
STATISTICS_VALID_PERCENT=100
____________________________________
How does that look?
--
signature-mini
Kia ora
*JohnG*
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