Hi,
I think you would be better off using a GIS than Inkscape for the compilation of your map. QGIS would be a good, GPL based, software for your task. In a GIS you can better define your units and projection and then export to DXF, which can be read in Sketchup.
The conversion of the GIS format (.e.g Shapefile, SpatiaLite, Postgis) to DXF may need manual conversion on the command line. OGR can help with that: http://www.gdal.org/ogr/drv_dxf.html - QGIS still needs some improvements for DXF import/Export.
regarding SVG and units: in QGIS you can use SVG for several purposes:
* point symbol definitions: You can use the SVG symbol and define its box in either map units or mm. The former scales with the zoom factor of the map, the latter stays at constant size, regardless of zoom factor. You can rotate and scale the symbols. * vector pattern definitions (uses the whole content of an SVG file, not a pattern definition) - you can repeat/scale/rotate the pattern * as a vector graphics in a map layout (print composer)
In all of these options, you don't define the objects in map units, but rather paper units. QGIS uses the SVG and scales it, starting from the viewBox/width/height settings.
Hope this helps, Andreas
On Fri, 4 Mar 2011 09:25:21 +0100, Sébastien Barthélémy wrote:
Hello,
I'd like to draw the map of a building using inkscape, and overlay my drawings with satellite views.
A batch program would then modify the map to adjust the position of some points.
Then I would like to import the svg file into sketchup and use it as a basis for quick 3d renderings.
And now the question: which units should I use for the canvas?
The building size is 50x15 meters. My first idea was to use this size as the canvas, but for some reason, in such a case, inkscape does not allow me to unzoom as much as I would like too (I cannot have the full drawing on screen).
Is there as reson for this and a workaround?
I know many maps and GIS use SVG somehow, how do they choose their basis unit? A Cheers
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