On 08/09/16 17:10, Stuart Edwards wrote:
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.
This is a very difficult projection system to deal with, to the point
that many agencies have banned it.
Please see https://trac.osgeo.org/grass/ticket/2229 for a discussion on
that issue.
Moritz
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