Hi Joachim Do I understand correctly:
You have a sparse set of points with recorded travel times? And you want to (a) interpolate them into a continuous raster surface and (b) extract isochrones from the result of (a)? The first step would be to choose an interpolator function that can handle your sparse points input. What have you tried? Kriging? IDW? Splines? And using what settings? Cheers, Ben ----- Original Message ----- > We are looking for an algorythm that can draw iso lines from a set of > data points. Like drawing isometric lines or a DEM from a set of > elevation data. (It is actually isochrone lines from a set of travel > times). We've tried with a fillvoid function, but the voids between > the points seemed to large to be filled. Any suggestion ? > Thanks, Joachim > > _______________________________________________ Sextante-users mailing > list Sextante-users@lists.forge.osor.eu > https://lists.forge.osor.eu/listinfo/sextante-users ------ Files attached to this email may be in ISO 26300 format (OASIS Open Document Format). If you have difficulty opening them, please visit http://iso26300.info for more information. _______________________________________________ Sextante-users mailing list Sextante-users@lists.forge.osor.eu https://lists.forge.osor.eu/listinfo/sextante-users
