All:
I have dowloaded a GeoTiff image file of global impervious surface area (%) from http://ngdc.noaa.gov/eog/dmsp/download_global_isa.html:
2010 January-June GeoTiff image
Using GRASS 7.0 on Ubuntu I’m actually able to import the file without errors, but it will not display. On my Mac I can easily display the image in Preview and I can drop the file into QGIS 2.4 and it also displays fine.
I have tried many different options importing the GeoTiff file, but it just will not display. If I use r.info the E-W and N-S bounds are correct and the N-S resolution looks right (0:00:30 deg), but the E-W resolution is very small (0:00:00.000335 deg); also…
Rows: 16801
Columns: 43201
Total cells: 725820001
The data range is correct 0 – 100
Any thoughts?
Best,
Tom
It looks like the extent goes slightly beyond +180 deg E and -180 deg W: micha@MS-Rebecca ~/Downloads $ gdalinfo EstISA_final.tif … Corner Coordinates: Upper Left (-180.0041667, 75.0041667) (180d 0’15.00"W, 75d 0’15.00"N) Lower Left (-180.0041667, -65.0041107) (180d 0’15.00"W, 65d 0’14.80"S) Upper Right ( 180.0040227, 75.0041667) (180d 0’14.48"E, 75d 0’15.00"N) Lower Right ( 180.0040227, -65.0041107) (180d 0’14.48"E, 65d 0’14.80"S) … Here’s what worked for me: gdalwarp -te -180 -65 180 75 -tr 0.0083 0.0083 EstISA_final.tif estisa_fixed.tif Then I imported the fixed raster, and it displayed OK. This will shave off a few pixels around the edges. But I don’t think there’s any way to avoid that.
···
On 03/25/2015 10:42 PM, Thomas Adams wrote:
All:
I have dowloaded a GeoTiff image file of global impervious surface area (%) from http://ngdc.noaa.gov/eog/dmsp/download_global_isa.html:
2010 January-June GeoTiff image
Using GRASS 7.0 on Ubuntu I’m actually able to import the file without errors, but it will not display. On my Mac I can easily display the image in Preview and I can drop the file into QGIS 2.4 and it also displays fine.
I have tried many different options importing the GeoTiff file, but it just will not display. If I use r.info the E-W and N-S bounds are correct and the N-S resolution looks right (0:00:30 deg), but the E-W resolution is very small (0:00:00.000335 deg); also…
Rows: 16801
Columns: 43201
Total cells: 725820001
The data range is correct 0 – 100
Any thoughts?
Best,
Tom
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Micha,
Thank you very much! I don’t think the loss of a few pixels will be too bad — I’ll give it a try.
Best,
Tom
···
On Wed, Mar 25, 2015 at 4:27 PM, Micha Silver <micha@arava.co.il> wrote:
On 03/25/2015 10:42 PM, Thomas Adams wrote:
All:
I have dowloaded a GeoTiff image file of global impervious surface area (%) from http://ngdc.noaa.gov/eog/dmsp/download_global_isa.html:
2010 January-June GeoTiff image
It looks like the extent goes slightly beyond +180 deg E and -180 deg W:
micha@MS-Rebecca ~/Downloads $ gdalinfo EstISA_final.tif
…
Corner Coordinates:
Upper Left (-180.0041667, 75.0041667) (180d 0’15.00"W, 75d 0’15.00"N)
Lower Left (-180.0041667, -65.0041107) (180d 0’15.00"W, 65d 0’14.80"S)
Upper Right ( 180.0040227, 75.0041667) (180d 0’14.48"E, 75d 0’15.00"N)
Lower Right ( 180.0040227, -65.0041107) (180d 0’14.48"E, 65d 0’14.80"S)
…
Here’s what worked for me:
gdalwarp -te -180 -65 180 75 -tr 0.0083 0.0083 EstISA_final.tif estisa_fixed.tif
Then I imported the fixed raster, and it displayed OK. This will shave off a few pixels around the edges. But I don’t think there’s any way to avoid that.
Using GRASS 7.0 on Ubuntu I’m actually able to import the file without errors, but it will not display. On my Mac I can easily display the image in Preview and I can drop the file into QGIS 2.4 and it also displays fine.
I have tried many different options importing the GeoTiff file, but it just will not display. If I use r.info the E-W and N-S bounds are correct and the N-S resolution looks right (0:00:30 deg), but the E-W resolution is very small (0:00:00.000335 deg); also…
Rows: 16801
Columns: 43201
Total cells: 725820001
The data range is correct 0 – 100
Any thoughts?
Best,
Tom
This mail was received via Mail-SeCure System.
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[http://lists.osgeo.org/mailman/listinfo/grass-user](http://lists.osgeo.org/mailman/listinfo/grass-user)
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Thomas E Adams, III
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Lebanon, OH 45036
1 (513) 739-9512 (cell)