[GRASS-user] how to convert google or any other bmp/jpeg/geotiff maps into shape format

[Moritz Lennert]

On 01/12/08 07:24, Alpha GRASS wrote:
> Dear All,
> I am trying to convert Google maps like bmp, jpg, GeoTiff into shape format.
> If you have any idea please let me know.

The formats you listed are raster formats, whereas shape is a vector 
format. So, you cannot simply "convert", but you can vectorize the 
elements in the raster map.

In GRASS this would mean the following steps:

- import the raster with r.in.gdal,
- use (if lines: r.thin &) r.to.vect to transform to vector
- v.out.ogr to export to shape.

Moritz