0> In article <4975F623.504@gmx.de>, 0> Torsten Leistikow <URL:mailto:de_muur@gmx.de> ("Torsten") wrote: Torsten> Toby Speight schrieb:
I've written a makefile to turn SRTM elevation data into vector contour maps (I'll write it up on OpenStreetMap.org once I'm happy with it).
Torsten> This sounds like SRTM2OSM. That's what I started with, but I wanted to use the void-filled data from CGIAR (the SRTM data are quite poor in Wester Ross). I know it's a non-free dataset, but the benefit is worth the sacrifice to principle! Rather than convert the geotiffs into srtm2osm's format, it seemed more sensible to just work with standard tools such as gdal_contour. The workflow is (zip) -> unzip -> (geotiff, 5°x5°) -> gdal_translate -> (geotiff, 1°x1°) -> gdal_contour -> (shape) -> gpsbabel -> perl -> gzip -> (compressed OSM) leaving me with the goods for mkgmap. Torsten> I have an handbuild example osm-file for testing my own Torsten> map-symbols, and this uses purely negative ID values without Torsten> any problems. Ah, good - I'll investigate further. Thanks for your help.