[GRASS-user] Georeferencing DXF files.

GRASS GRASS user
1

Hi all.

I finally managed to import dxf files in GRASS 6.2 and subsequently
export the vector data as a shapefile. However, the shapefiles are not
georeferenced.

Now, I'm wondering if I can georeference the shapefile or do I need to
make sure that the dxf is georeferenced prior to importing it in GRASS.

THe reason why I ask is that to georeference a huge 50MB dxf file, I
need the help of autocad but I would like to avoid using this
proprietary software .... Anybody aware of how to georeference vector
data? Maybe within GRASS (so after importing the dxf but before
exporting the shapefile)?

Many thanks

--
-------------------------------------
      Antonio Gennarini
  (Environmental Consultant)
-------------------------------------
ESI Ltd
Soil and Groundwater Specialists
New Zealand House
160, Abbey Foregate
Shrewsbury SY2 6FD
United Kingdom
Telephone: +44 (0)1743 276100 Direct Dial: +44 (0)1743 276145
Fax: +44 (0)1743 248600
Email antoniogennarini@esinternational.com
<http://www.esinternational.com>

2

Hi Antonio,

after import with v.in.dxf, use v.transform to do the georeferencing.
Then export as shapefile (I understand that you want it as SHAPE file
in the end?).

Markus

Antonio Gennarini-3 wrote:

Hi all.

I finally managed to import dxf files in GRASS 6.2 and subsequently
export the vector data as a shapefile. However, the shapefiles are not
georeferenced.

Now, I'm wondering if I can georeference the shapefile or do I need to
make sure that the dxf is georeferenced prior to importing it in GRASS.

THe reason why I ask is that to georeference a huge 50MB dxf file, I
need the help of autocad but I would like to avoid using this
proprietary software .... Anybody aware of how to georeference vector
data? Maybe within GRASS (so after importing the dxf but before
exporting the shapefile)?

Many thanks

--
-------------------------------------
      Antonio Gennarini
  (Environmental Consultant)
-------------------------------------
ESI Ltd
Soil and Groundwater Specialists
New Zealand House
160, Abbey Foregate
Shrewsbury SY2 6FD
United Kingdom
Telephone: +44 (0)1743 276100 Direct Dial: +44 (0)1743 276145
Fax: +44 (0)1743 248600
Email antoniogennarini@esinternational.com
<http://www.esinternational.com>

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