[mkgmap-dev] [PATCH] Creating contour lines from DEM data

Sat Jul 4 01:19:32 BST 2009

Hi!

Christian Gawron schrieb:
> the attached java classes together with the patch enables mkgmap to 
> create contour lines directly from digital elevation model (DEM) data. 
> This may be useful for those who don't want to ceate contour lines with 
> other tools and store them in huge(!) files.
> 
> It introduces the following new options:
> --contours   If set, create contours.
> --dem-type  Valid values are CGIAR (CGIAR geotiff), ASTER (ASTER 
> geotiff) or SRTM (.hgt files). Default is CGIAR.
> --dem-path  Path to the DEM data files. The default is type-dependant.
> --dem-increment Verical distance between the contour lines (default is 
> 10m).

Sounds interesting. Does it also distinguish minor and major elevation 
lines? What determines the area in which the contour lines are 
calculated? Is there a way to avoid an overload with contours e.g. when 
processing the whole of Germany inclduing very flat country as well as 
the the alps?

bye
       Nop