[GRASS-user] Problem re-projecting 'WGS_1984_Web_Mercator_Auxiliary_Sphere'
Stuart Edwards
sedwards2 at cinci.rr.com
Thu Sep 8 08:10:09 PDT 2016
Hi -
I'm trying to work with some vector data that is in the 'WGS_1984_Web_Mercator_Auxiliary_Sphere' projection - an apparently popular web mapping projection. I want to re-project it to a state plane co-ordinate system (ohio-north us survey ft).
The EPSG code for the raw data is (reportedly) 3857, but GRASS gives the following error messages when trying to import to a location set to this projection:
'Projection of following layers do not match with projection of current location' ....... the layers will be re-projected.
This fails and the console shows the following error: ERROR 6: No translation for Mercator Auxiliary Sphere to PROJ.4 format is known.
The data import to an x,y location with an ERROR 6 message, but otherwise seems intact including attributes (just crazy co-ordinates).
Re-projecting to the SPC location fails with: v.proj --overwrite location=OHxy mapset=PERMANENT input=PCR_Local output=ohPCR WARNING: <PROJ INFO> file not found for location <OHxy>
With some minor aggravation my wife's arcgis was able to figure this out - but any suggestions on how to proceed in GRASS would be much appreciated.
thx
Stu
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