CGIAR DEM + gdalwarp — projection to Cartesian is not happeningHow can I fix badly specified geographic...
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CGIAR DEM + gdalwarp — projection to Cartesian is not happening
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I have downloaded a 30-by-30 tile from 
http://srtm.csi.cgiar.org/srtmdata/
Then gdalinfo on the obtained single *.tif-file would yield
Driver: GTiff/GeoTIFF
Files: cut_n30e000.tif
cut_n30e000.tif.aux.xml
Size is 36024, 36023
Coordinate System is `'
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841)
Lower Left ( -0.0104166, 29.9904167)
Upper Right ( 30.0095841, 60.0095841)
Lower Right ( 30.0095841, 29.9904167)
Center ( 14.9995837, 45.0000004)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
Min=-444.000 Max=4783.000
Minimum=-444.000, Maximum=4783.000, Mean=348.628, StdDev=398.861
NoData Value=-32768
Metadata:
STATISTICS_MAXIMUM=4783
STATISTICS_MEAN=348.62818252965
STATISTICS_MINIMUM=-444
STATISTICS_STDDEV=398.86067773429
So far so good. So I would try to project this onto a 2D plane, as follows:
gdalwarp -t_srs '+proj=tmerc +lat_0=44.00 +lon_0=15.00 +units=m +no_defs' cut_n30e000.tif result_europe.tmerc.tif.
After this operation, result_europe.tmerc.tif is supposed to be represented
with respect to a Cartesian system of coordinates.
But I was surprised to find out that the lat/lon system persists:
Driver: GTiff/GeoTIFF
Files: result_europe.tmerc.tif
Size is 36024, 36023
Coordinate System is:
PROJCS["unnamed",
GEOGCS["WGS 84",
DATUM["unknown",
SPHEROID["WGS84",6378137,298.257223563]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",44],
PARAMETER["central_meridian",15],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841) ( 15d 0' 0.00"E, 44d 0' 1.94"N)
Lower Left ( -0.0104166, 29.9904167) ( 15d 0' 0.00"E, 44d 0' 0.97"N)
Upper Right ( 30.0095841, 60.0095841) ( 15d 0' 1.35"E, 44d 0' 1.94"N)
Lower Right ( 30.0095841, 29.9904167) ( 15d 0' 1.35"E, 44d 0' 0.97"N)
Center ( 14.9995837, 45.0000004) ( 15d 0' 0.67"E, 44d 0' 1.46"N)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
NoData Value=-32768
Why the original lat/lon bounds are still there? I.e. what was wrong with my gdalwarp command above?
dem gdalwarp
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
add a comment |
I have downloaded a 30-by-30 tile from
http://srtm.csi.cgiar.org/srtmdata/
Then gdalinfo on the obtained single *.tif-file would yield
Driver: GTiff/GeoTIFF
Files: cut_n30e000.tif
cut_n30e000.tif.aux.xml
Size is 36024, 36023
Coordinate System is `'
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841)
Lower Left ( -0.0104166, 29.9904167)
Upper Right ( 30.0095841, 60.0095841)
Lower Right ( 30.0095841, 29.9904167)
Center ( 14.9995837, 45.0000004)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
Min=-444.000 Max=4783.000
Minimum=-444.000, Maximum=4783.000, Mean=348.628, StdDev=398.861
NoData Value=-32768
Metadata:
STATISTICS_MAXIMUM=4783
STATISTICS_MEAN=348.62818252965
STATISTICS_MINIMUM=-444
STATISTICS_STDDEV=398.86067773429
So far so good. So I would try to project this onto a 2D plane, as follows:
gdalwarp -t_srs '+proj=tmerc +lat_0=44.00 +lon_0=15.00 +units=m +no_defs' cut_n30e000.tif result_europe.tmerc.tif.
After this operation, result_europe.tmerc.tif is supposed to be represented
with respect to a Cartesian system of coordinates.
But I was surprised to find out that the lat/lon system persists:
Driver: GTiff/GeoTIFF
Files: result_europe.tmerc.tif
Size is 36024, 36023
Coordinate System is:
PROJCS["unnamed",
GEOGCS["WGS 84",
DATUM["unknown",
SPHEROID["WGS84",6378137,298.257223563]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",44],
PARAMETER["central_meridian",15],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841) ( 15d 0' 0.00"E, 44d 0' 1.94"N)
Lower Left ( -0.0104166, 29.9904167) ( 15d 0' 0.00"E, 44d 0' 0.97"N)
Upper Right ( 30.0095841, 60.0095841) ( 15d 0' 1.35"E, 44d 0' 1.94"N)
Lower Right ( 30.0095841, 29.9904167) ( 15d 0' 1.35"E, 44d 0' 0.97"N)
Center ( 14.9995837, 45.0000004) ( 15d 0' 0.67"E, 44d 0' 1.46"N)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
NoData Value=-32768
Why the original lat/lon bounds are still there? I.e. what was wrong with my gdalwarp command above?
dem gdalwarp
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
What are you specifying as -s_srs? It's not defined in your from info.
– Michael Stimson
1 min ago
add a comment |
I have downloaded a 30-by-30 tile from
http://srtm.csi.cgiar.org/srtmdata/
Then gdalinfo on the obtained single *.tif-file would yield
Driver: GTiff/GeoTIFF
Files: cut_n30e000.tif
cut_n30e000.tif.aux.xml
Size is 36024, 36023
Coordinate System is `'
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841)
Lower Left ( -0.0104166, 29.9904167)
Upper Right ( 30.0095841, 60.0095841)
Lower Right ( 30.0095841, 29.9904167)
Center ( 14.9995837, 45.0000004)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
Min=-444.000 Max=4783.000
Minimum=-444.000, Maximum=4783.000, Mean=348.628, StdDev=398.861
NoData Value=-32768
Metadata:
STATISTICS_MAXIMUM=4783
STATISTICS_MEAN=348.62818252965
STATISTICS_MINIMUM=-444
STATISTICS_STDDEV=398.86067773429
So far so good. So I would try to project this onto a 2D plane, as follows:
gdalwarp -t_srs '+proj=tmerc +lat_0=44.00 +lon_0=15.00 +units=m +no_defs' cut_n30e000.tif result_europe.tmerc.tif.
After this operation, result_europe.tmerc.tif is supposed to be represented
with respect to a Cartesian system of coordinates.
But I was surprised to find out that the lat/lon system persists:
Driver: GTiff/GeoTIFF
Files: result_europe.tmerc.tif
Size is 36024, 36023
Coordinate System is:
PROJCS["unnamed",
GEOGCS["WGS 84",
DATUM["unknown",
SPHEROID["WGS84",6378137,298.257223563]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",44],
PARAMETER["central_meridian",15],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841) ( 15d 0' 0.00"E, 44d 0' 1.94"N)
Lower Left ( -0.0104166, 29.9904167) ( 15d 0' 0.00"E, 44d 0' 0.97"N)
Upper Right ( 30.0095841, 60.0095841) ( 15d 0' 1.35"E, 44d 0' 1.94"N)
Lower Right ( 30.0095841, 29.9904167) ( 15d 0' 1.35"E, 44d 0' 0.97"N)
Center ( 14.9995837, 45.0000004) ( 15d 0' 0.67"E, 44d 0' 1.46"N)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
NoData Value=-32768
Why the original lat/lon bounds are still there? I.e. what was wrong with my gdalwarp command above?
dem gdalwarp
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
I have downloaded a 30-by-30 tile from
http://srtm.csi.cgiar.org/srtmdata/
Then gdalinfo on the obtained single *.tif-file would yield
Driver: GTiff/GeoTIFF
Files: cut_n30e000.tif
cut_n30e000.tif.aux.xml
Size is 36024, 36023
Coordinate System is `'
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841)
Lower Left ( -0.0104166, 29.9904167)
Upper Right ( 30.0095841, 60.0095841)
Lower Right ( 30.0095841, 29.9904167)
Center ( 14.9995837, 45.0000004)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
Min=-444.000 Max=4783.000
Minimum=-444.000, Maximum=4783.000, Mean=348.628, StdDev=398.861
NoData Value=-32768
Metadata:
STATISTICS_MAXIMUM=4783
STATISTICS_MEAN=348.62818252965
STATISTICS_MINIMUM=-444
STATISTICS_STDDEV=398.86067773429
So far so good. So I would try to project this onto a 2D plane, as follows:
gdalwarp -t_srs '+proj=tmerc +lat_0=44.00 +lon_0=15.00 +units=m +no_defs' cut_n30e000.tif result_europe.tmerc.tif.
After this operation, result_europe.tmerc.tif is supposed to be represented
with respect to a Cartesian system of coordinates.
But I was surprised to find out that the lat/lon system persists:
Driver: GTiff/GeoTIFF
Files: result_europe.tmerc.tif
Size is 36024, 36023
Coordinate System is:
PROJCS["unnamed",
GEOGCS["WGS 84",
DATUM["unknown",
SPHEROID["WGS84",6378137,298.257223563]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",44],
PARAMETER["central_meridian",15],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-0.010416618510297,60.009584059976817)
Pixel Size = (0.000833333353512,-0.000833333353512)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -0.0104166, 60.0095841) ( 15d 0' 0.00"E, 44d 0' 1.94"N)
Lower Left ( -0.0104166, 29.9904167) ( 15d 0' 0.00"E, 44d 0' 0.97"N)
Upper Right ( 30.0095841, 60.0095841) ( 15d 0' 1.35"E, 44d 0' 1.94"N)
Lower Right ( 30.0095841, 29.9904167) ( 15d 0' 1.35"E, 44d 0' 0.97"N)
Center ( 14.9995837, 45.0000004) ( 15d 0' 0.67"E, 44d 0' 1.46"N)
Band 1 Block=36024x1 Type=Int16, ColorInterp=Gray
NoData Value=-32768
Why the original lat/lon bounds are still there? I.e. what was wrong with my gdalwarp command above?
dem gdalwarp
dem gdalwarp
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
asked 4 mins ago
IlonpilaajaIlonpilaaja
1195
1195
What are you specifying as -s_srs? It's not defined in your from info.
– Michael Stimson
1 min ago
add a comment |
What are you specifying as -s_srs? It's not defined in your from info.
– Michael Stimson
1 min ago
What are you specifying as -s_srs? It's not defined in your from info.
– Michael Stimson
1 min ago
What are you specifying as -s_srs? It's not defined in your from info.
– Michael Stimson
1 min ago
add a comment |
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What are you specifying as -s_srs? It's not defined in your from info.
– Michael Stimson
1 min ago