Re: [OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-13 Thread Christoph Hormann
On Wednesday 13 March 2013, Jochen Topf wrote: > > Another option would be to split up the long straight lines resulting > from the splitting into shorter pieces. If the pieces are short > enough, it should be okay. Maybe there is some tool around that can > do that easily? I don't want to put more

Re: [OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-13 Thread AJ Ashton
On Wed, Mar 13, 2013 at 12:13 PM, Jochen Topf wrote: > On Tue, Mar 12, 2013 at 07:00:25PM +0100, Peter Körner wrote: > > That's not that easy for the polar regions, because transforming the > > splittet polygons to the destination projection results in gaps > > because of straigt lines not beeing

Re: [OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-13 Thread Jochen Topf
On Tue, Mar 12, 2013 at 07:00:25PM +0100, Peter Körner wrote: > Am 11.03.2013 21:10, schrieb Sven Geggus: > >Peter Körner wrote: > > > >>what way would you choose and wich tools could be used to go that way? > > > >Use the Water-Polygons from openstreetmapdata.com instead of land > >polygons. > >

Re: [OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-12 Thread Peter Körner
Am 11.03.2013 21:10, schrieb Sven Geggus: Peter Körner wrote: what way would you choose and wich tools could be used to go that way? Use the Water-Polygons from openstreetmapdata.com instead of land polygons. That's not that easy for the polar regions, because transforming the splittet po

Re: [OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-11 Thread Sven Geggus
Peter Körner wrote: > what way would you choose and wich tools could be used to go that way? Use the Water-Polygons from openstreetmapdata.com instead of land polygons. This way you can use a layer order like this: * gray background * hillshade * water polygons without opacity Regards Sven -

Re: [OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-07 Thread Christoph Hormann
On Thursday 07 March 2013, Peter Körner wrote: > b) extend the image with value 181 at the borders to fit the size of > the image i'm going to render > > My question is: > what way would you choose and wich tools could be used to go that > way? for b: gdalwarp -dstnodata 181 Note it is usually

[OSM-dev] Zeroing or Extending a Hillshade-Tiff

2013-03-07 Thread Peter Körner
Hi I have a Hillshading-Tiffs (a GeoTIFF with a single Greyscale-Band) in the correct projection and correctly aligned. My problem is, that it's slightly smaller then the area I'd like to render using mapnik: http://imageshack.us/photo/my-images/202/bildschirmfotovom201303.png/ There are o