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A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions. This tag also refers to cartographic projections and coordinate system transformations.

0 votes
0 answers
795 views

Using gdalwarp when source SRS is unclear

I have used gdal_translate to translate SRTM data from the NetCDF format to a GeoTIFF. My next step is to use gdalwarp to reproject this GeoTIFF, but I'm missing the SRS information on the original Ne …
interwebjill's user avatar
1 vote
0 answers
29 views

GDAL command to salvage GeotTIFF output that threw an error

I used gdalwarp on a large NetCDF file with the intention of getting a high quality geotiff in spherical mercator. I ran the following command which took three days to complete on my laptop: gdalwarp …
interwebjill's user avatar
2 votes
1 answer
2k views

Translating EPSG:4326 lon lat coordinates to xy using pyproj

I'm trying to work out the details of using pyproj to translate the lat lon coordinates from the USGS Earthquake feed to xy coordinates corresponding to those positions on a basemap of a determined wi …
interwebjill's user avatar
2 votes
1 answer
641 views

Converting GeoTIFF from EPSG:4326 to Spherical Mercator using QGIS

I'm using QGIS 3.12. I'd like to reproject NASA's Black Marble GeoTIFF (3600x1800 (0.1 degrees)) from https://earthobservatory.nasa.gov/features/NightLights/page3.php. The original projection is EPSG: …
interwebjill's user avatar