[GRASS-user] rescsaling a vector visually (dxf exported from inkscape)

Patrice Dumas pertusus at free.fr
Tue Apr 9 05:04:14 PDT 2013


I have a vector I have created with inkscape, by using a scanned jpeg 
map as background. I saved the vector in dxf (using better_dxf to keep 
the layers). It seems that dxf do not allow to specify a scale.

I import the scanned jpeg map in grass, in an XY location, and I use
georectification to reproject it in a lon-lat location using points from
the scanned raster.

When I import the dxf vector file with v.in.dxf in the XY location, I
get a tiny vector that has a seemingly arbitrary scale.

Now, I would like to import the dxf vector in the lon-lat location and 
use a visual tool to determine/apply a transformation to the vector to 
match with the raster that is now correct in the lon-lat location, and 
where I can easily see the features I reported in the vector in inkscape.

Did I miss something in the process that could have allowed me to keep
the scale information for the vector?

If not, can I do the visual matching with grass? If not, do you have an
idea about what I could do?

Thanks in advance.


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