Creation of contour lines

Bernhard_Hiller · 2018-02-11T15:52:25.000Z

Now that the mkgmap team successfully implemented the DEM feature, I tried it and got it working immediately.
But there is a catch: DEM data does not mean elevation contour lines.
The *.hgt files were downloaded from Viewfinder Panoramas.
Somewhere in the mkgmap mailing lists, the program “phyghtmap” was suggested.
After a few hours of trying to get it running on Windows 7 64bit, I must call that a complete failure:

it can not be installed with Python 3.6 (a syntax error)
it can be installed with Python 2.7, but fails with an import error (nxutils of matplotlib, but matplotlib is installed)

So I want to ask: are there other possibilities for creating contour lines?

n76 · 2018-02-11T17:03:04.000Z

I use gdal_contour, part of the gdal package to generate contours from DEM data.

Edit: I use that on a Mac but I am pretty sure the GDAL libraries and utilities are available on Unix and Windows.

Bernhard_Hiller · 2018-02-11T17:25:40.000Z

Thanks. I’ll give that a try.
But then the next … step has to be accomplished: transform the shape file to some other format suitable for mkgmap.