[GRASS-user] v.proj help

GRASS GRASS user
1

Hi,

I am trying to make a map of points from a CSV file. I have imported the
file using v.in.ascii and the map displays correctly. My problem is that it
uses a different coordinate system than another map that I am trying to
incorporate it with. I tried to reproject the point map to my other map
using v.proj but when I display the both of them together they are still in
different coordinate systems. I don't know if I am going about this the
wrong way or if there is a step I am missing. I would greatly appreciate any
response as this has been the source of my frustration. Thank you,

Gustavo Espinoza
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2

On Thu, 2009-07-23 at 05:45 -0700, Gustavo Espinoza wrote:

Hi,

I am trying to make a map of points from a CSV file. I have imported the
file using v.in.ascii and the map displays correctly. My problem is that it
uses a different coordinate system than another map that I am trying to
incorporate it with. I tried to reproject the point map to my other map
using v.proj but when I display the both of them together they are still in
different coordinate systems. I don't know if I am going about this the
wrong way or if there is a step I am missing. I would greatly appreciate any
response as this has been the source of my frustration. Thank you,

Gustavo Espinoza

Hi Gustavo!

Import your point vector map (the way you did but) in a (grass-)location
defined by its coordinate reference system.

Then reproject (v.proj) the other vector map from "its" location to the
location you created for the point map. Or the other way,
"pull" (=reproject) the point map to the other location.

If you already did that, then maybe the maps are not meant to coincide
since you can define a grass-location by one and only one coordinate
reference system.

All the best, Nikos

3

That worked. Thank you so much I have been working on that for a few days
now (I am still very new to GRASS). I appreciate the help.

Gustavo

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