Hi Jim,
What OS data are you requesting? In general, it is best to have the files in GML as DWG is propietry format and needs extra effort to be read in GRASS.
If you are working with OS MasterMap, the GML contains nested attributes and best to convert them to a standard format. We have developed a tool in QGIS to convert GML/GZ files directly to PostGIS (or Shapefile):
http://www.lutraconsulting.co.uk/products/ostranslator-ii/
http://www.lutraconsulting.co.uk/products/ostranslator/
You can then use the data in GRASS easily.
For other OS products in GML format, you can directly read them in GRASS as the attribute tables are less complex compared with OSMM.
Hope it helps,
Cheers,
Saber
From: grass-user [mailto:grass-user-bounces@lists.osgeo.org] On Behalf Of James Maas (MED)
Sent: 19 January 2016 07:15
To: grass-user@lists.osgeo.org
Subject: [GRASS-user] file formats from Ordinance Survey maps
I’m attempting to get some maps and use them in GRASS, which gives me a choice of formats to download from. Can anyone tell me if any one of these formats is better and will allow direct import into GRASS 7.0.2. without transformation.
For one type of topography map I can get either GML2, DWG or File Geodatabase.
For another type of Terrain type map I can get either Shape, GML3 or DWG.
I have googled and looked at the choices provided by
Dr. Jim Maas
Mathematical Modelling in
Epidemiology of Infectious Disease
Rm 2.13 MED
Norwich Medical School
University of East Anglia
Norwich Research Park,
NR4 7TJ U.K.
E: j.maas@uea.ac.uk
P: +44 (0)1603 91325
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