Panagiotis Mavrogiorgos a écrit: > Which is the prefered method of reprojecting a large number of maps and > converting them to e.g. GeoJSON files?
If only a (re-)projection/conversion task, you may rely on gdal/ogr utilities. > I think that there are two options: > > 1. (According to the wiki > <https://grasswiki.osgeo.org/wiki/Map_Reprojection>), you should create a > new location with the export projection you want to export, import the maps > using {v,r}.proj and then export the maps (e.g. using v.out.ogr/r.out.gdal. Perhaps it is possible to skip the import part. Using, instead, [rv].external ...? > 2. Export the maps directly using v.out.ogr/r.out.gdal and then reproject > them using GDAL/OGR. > > So, > > 1. So are there any significant differences between the two methods? AFAIK > the underlying algorithms should be the same. > > The first method seems to have higher disk space requirements, while the > second one seems to be easier to implement. > > 2. How can I handle vertex densification in the second approach? Reminds of a v.clean related processing. You mean "simplification"? Not sure if there is an related OGR tool too. Nikos > 3. Are there any other caveats that I need to be aware of? _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
