What I'm trying to do is get the bounding boxes around each country in the world, so I can create a region file for each. This would make doing graphics by country much easier. For example, we have constructed a raster at 1 km resolution of the number of amphibian species ranges at each location for the whole world. There are times when I just want, say the counts in India. We have a nice little script that generates a png automatically based on a region file. It would be nice to have such a file for each country in the world.
If I read your example correctly, ogrinfo gives me the box around the entire shapefile, not individual polygons. I suppose an alternative would be to somehow export each country polygon as a separate shapefile and get the region of that. Any tips appreciated. Thanks, Jerry -----Original Message----- From: Jose Gomez-Dans [mailto:[EMAIL PROTECTED] Sent: Thursday, September 27, 2007 4:59 PM To: Jerry Nelson Cc: [email protected] Subject: Re: [GRASS-user] finding bounding box of polygons Hi, On 9/27/07, Jerry Nelson <[EMAIL PROTECTED]> wrote: > I'd like to construct a list of the bounding box coordinates for all the > polygons in a vector file. I could find nothing in the manual that seemed to > do that. Any tips appreciated. Not a GRASS-centric response :), but if it is just a box you're after, you can probably use ogrinfo for this, as it gives you the Extent of your file. As an example, using it with the world.shp Shapefile results in: $ ogrinfo -so python/world.shp world INFO: Open of `python/world.shp' using driver `ESRI Shapefile' successful. Layer name: world Geometry: Polygon Feature Count: 244 Extent: (-180.000000, -89.900000) - (180.000000, 83.674733) Layer SRS WKT: (unknown) NAME: String (40.0) CAPITAL: String (64.0) APPROX: Real (15.0) AREA: Real (20.15) SOURCETHM: String (16.0) Hope that helps _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
