Frank thanks for your reply. In the meantime, I found a source that is in ESRI Shapefile and is based on VMAP Level 0 Global Base Map Data. I will look more into it since now I am getting more familiar with this matter.<br>
<br>Thanks anyway!<br><br><div class="gmail_quote">On Dec 13, 2007 5:48 PM, Frank Warmerdam <<a href="mailto:warmerdam@pobox.com">warmerdam@pobox.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">Konstantinos Vassiliadis wrote:<br>> I have downloaded the VMAP0 dataset. I was wondering whether it is<br>> possible to somehow import these data to MapGuide OS Viewer or some<br>> other client. Essentially I am looking for geospatial data about a
<br>> specific region in Italy - preferrably to be available in the public<br>> domain but if not it is ok.<br>> Any ideas please?<br><br></div>Konstantinos,<br><br>VMAP0 data in VPF format is pretty messy to work with. In theory you can
<br>build OGR with the OGDI add on driver, and use that to access VPF data<br>like VMAP0. But that would be pretty challenging to get right.<br><br>Alternatively you could use an existing OGR+OGDI build and ogr2ogr to<br>
translate the data you want into shapefiles or something similar that is<br>more accessable. FWTools includes everything you need<br>(<a href="http://fwtools.maptools.org" target="_blank">http://fwtools.maptools.org</a>) but addressing VMAP0 data is still a bit
<br>hard. For a VMAP0 Eurasian CD dataset sitting on disk as /mnt/cdrom/v0eur<br>I would use the following datasource name for OGR:<br><br> gltp:/vrf/mnt/cdrom/v0eur/vmaplv0/eurnasia<br><br>If you do an ogrinfo on that you will get layer names like:
<br><br>1: libref@libref(*)_line (Line String)<br>2: libreft@libref(*)_text (Point)<br>3: tileref@tileref(*)_area (Polygon)<br>4: tilereft@tileref(*)_text (Point)<br>5: polbndp@bnd(*)_point (Point)<br>6: coastl@bnd(*)_line (Line String)
<br>7: depthl@bnd(*)_line (Line String)<br>8: polbndl@bnd(*)_line (Line String)<br>9: oceansea@bnd(*)_area (Polygon)<br>...<br><br>You can copy one layer to a shapefile something like:<br><br> ogr2ogr coastl.shp gltp:/vrf/mnt/cdrom/v0eur/vmaplv0/eurnasia \
<br> "coastl@bnd(*)_line" -nln coastl<br><br>But most interesting data from VMAP0 is available from other sources<br>as shapefiles so my real advice is to dig up one of those sources and<br>use it.<br>
<br>Best regards,<br><font color="#888888">--<br>---------------------------------------+--------------------------------------<br>I set the clouds in motion - turn up | Frank Warmerdam, <a href="mailto:warmerdam@pobox.com">
warmerdam@pobox.com</a><br>light and sound - activate the windows | <a href="http://pobox.com/%7Ewarmerdam" target="_blank">http://pobox.com/~warmerdam</a><br>and watch the world go round - Rush | President OSGeo, <a href="http://osgeo.org" target="_blank">
http://osgeo.org</a><br></font><div><div></div><div class="Wj3C7c"><br>_______________________________________________<br>mapguide-users mailing list<br><a href="mailto:mapguide-users@lists.osgeo.org">mapguide-users@lists.osgeo.org
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