Where can I find London borough outlines for SPLAT!

Splat seems like it's a great tool for modelling what RF coverage I should have. It can create a nice circle around me, after I download topology data from USGS, namely SRTM-1.

But when the coverage map (created using -L 17) gets created it looks kind of like the logo on the Splat home page, which means I can't tell what's where on the map anymore.

Is there data for London (UK) I can overlay to make it clearer? I think I'm looking for cartographic boundary data. So it's this? But how do I convert it to the format that Splat wants?

• Don't know about data formats and SPLAT, but here's another good source of geodata that may or may not contain what you need: gadm.org/index.html – zrnzvxxy Apr 13 at 9:37
• Thanks, that had the data I needed. The KML file was easily convertible to the format needed: N x y x y x y END M x y x y END (where N and M are indexes, so "1" and "2" for this tiny example) That draws up the polygon. If you upgrade this to an answer I'll accept it. – Thomas Apr 14 at 13:54
• Glad it was useful! I've added a short answer. Perhaps it would be helpful to add more details about the format conversion, but you'd have to contribute that. – zrnzvxxy Apr 14 at 16:40