[GRASS-user] How to export 3D vector elevations with v.out.gpsbabel

Dwight Needels needels at translucida.com
Sun Mar 7 17:12:18 EST 2010

I have been importing multiple GPS tracks (of hiking trails) into  
GRASS for "averaging", then using v.out.gpsbabel to export a .gpx  
track for use on my GPS. I used v.drape to pull elevations from a DEM  
into the vector, and had hoped that using v.out.gpsbabel to export the  
resulting 3D vector would automatically export the elevation into the  
standard "ele" GPX data field. Unfortunately, the elevations all  
exported as 0.

Am I missing an option to have v.out.gpsbabel do this automatically?  
If not, this would be a nice enhancement.

Meanwhile, is there a workaround I can use to get vertex elevations in  
a 3D vector exported to a .gpx track?

I am running William Kyngesburye's 6.4RC5-3 on Mac OS X Leopard.

Thanks, -Dwight

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