Re: [GRASS-user] db.out.ogr issues [RESOLVED]

[Micha Silver]

On 08/10/2018 05:45 PM, Rich Shepard wrote: On Fri, 10 Aug 2018, Micha Silver wrote: If I understand, you have a vector of points with x,y and z in the attribute table, and you want to transform to some different coordinate system, while also transforming the elevation.   I must not yet be sufficiently cafinated this morning. When I look again at the input and v.out.ogr files I now see that I had transformed the elevation column to meters when my gawk script extracted columns from the source data. I was trying to point out that, regardless if the units are meters or feet, when you transform to a different CRS, you change all three values of the location, x,y and z. For example: micha@TP480:~$ echo "35.3 30.8 -180" | cs2cs +init=epsg:4326 +to +init=epsg:2039 228595.08    523262.05 -200.28  In the EPSG 2039 CRS my elevation has "dropped" by 20 meters (!) compared to WGS84 Cheers -- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab cell: +972-523-665918

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