How can I convert a .tif DEM to XYZ format using QGIS?
What I have is a geotiff image. What I need to do is turn that .tif into folders containing several XYZ tiles (like how Google Maps or OpenStreetMaps serves their tiles).
asked Nov 15, 2016 at 17:20
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Possible duplicate: gis.stackexchange.com/questions/201224/…– Andre SilvaCommented Nov 16, 2016 at 20:56
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1 Answer
In QGIS, go to Processing toolbox / GDAL/OGR / [GDAL] Conversion / gdal2xyz
This tool will extract x, y and z to a comma separate values file (.csv).
EDIT:
1) results is a .csv file. If you want to convert it to .txt, just open file.csv in excel an click en save as... / Text - tab delimited .(txt)
2) to export to a .xyz file.
n QGIS, go to Processing toolbox / GDAL/OGR / [GDAL] Conversion / Translate (convert format)
Go to Save to file... and select XYZ files (*.xyz)
In your case, from GMT documentation:
Examples
To create a grid file from the ASCII data in hawaii_grv.xyz, use
gmt xyz2grd hawaii_grv.xyz -Ddegree/degree/mGal/1/0//”Hawaiian Gravity”/”GRS-80 Ellipsoid used” -Ghawaii_grv_new.nc -R198/208/18/25 -I5m -V
answered Nov 15, 2016 at 17:36
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I've never use GMT, only QGIS for cartography. Which kind of input do you need for GMT? Commented Nov 16, 2016 at 0:52
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I also never use GMT, I use Arcgis and QGIS for cartography but someone request me x,y,z to plot a map with GMT. He told me that .txt and.prj it´s ok for him but I don´t know if .csv can run Commented Nov 16, 2016 at 14:42
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