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  • 0 posts edited
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  • 24 votes cast
Feb
14
awarded  Popular Question
Nov
22
awarded  Popular Question
Nov
7
awarded  Popular Question
Aug
15
awarded  Yearling
Jun
23
answered Offset shapefile to start from prime meridian
Jun
23
awarded  Tumbleweed
Jun
16
asked Offset shapefile to start from prime meridian
Jun
8
accepted re-project from EPSG:4326 to polar projection
Jun
8
comment re-project from EPSG:4326 to polar projection
Perhaps input has to be cropped first, like you did. Following your steps (i.e. cropping the input to north hemisphere) I also get expected result. Trying again on whole globe it fails for some reason. Thanks for you answer :)
Jun
8
revised re-project from EPSG:4326 to polar projection
added 528 characters in body
Jun
8
revised re-project from EPSG:4326 to polar projection
update gdalinfo
Jun
8
comment re-project from EPSG:4326 to polar projection
It reaches 90deg north. It's etopo tiff provided here: ngdc.noaa.gov/mgg/global. I'll update question with gdalinfo report. Thanks
Jun
8
asked re-project from EPSG:4326 to polar projection
Dec
27
accepted What's the difference between gdalwarp and gdal_merge for mosaicing
Dec
27
comment What's the difference between gdalwarp and gdal_merge for mosaicing
Had no idea about this tuning switch, which indeed speeds up the process. For reference 3000 is 3GB (more info trac.osgeo.org/gdal/wiki/UserDocs/GdalWarp) I have NumPy build with MKL in my system Python, but still gdalwarp must be doing something more, as NumPy can't be faster then C implementation, although can reach it.
Dec
25
revised What's the difference between gdalwarp and gdal_merge for mosaicing
edited body
Dec
25
asked What's the difference between gdalwarp and gdal_merge for mosaicing
Dec
13
comment How to re-project shapefiles?
Thanks I didn't know about that, and Googling it showed me what you meant. It's exactly what I needed. If you could have only posted your last comment yesterday... I did lot of typing to get there ;)
Dec
13
comment How to re-project shapefiles?
I was trying to overlay vector layer from one projection (epsg:31277) to another (epsg:4326). However I did not understood this well, as now I know that I don't need re-projection (changing the shapefile data) but just change to shapefile projection file (.prj) by using -a_srs instead -t_srs. Issue why EPSG:4326 SRS that didn't had projection, was because it's WGS84 geographic coordinate system, so it doesn't need projection, as was shown to me by others.
Dec
13
accepted How to re-project shapefiles?