[mkgmap-dev] Commit: r1576: There seems to be a way to show elevation profiles for a route without

Thu Feb 18 18:13:15 GMT 2010


On 18.02.2010 18:58, charlie at cferrero.net wrote:
> svn commit (svn at mkgmap.org.uk) wrote:
>
>    
>> Version 1576 was commited by steve on 2010-02-18 17:44:07 +0000
>> (Thu, 18 Feb 2010)
>>
>> There seems to be a way to show elevation profiles for a route without
>> having the DEM subfiles stored in the map.
>> There is a byte in TDB file's header section which can be set to 1. If
>> set MapSource generates the profile from the contour lines. The result
>> is not as good as having the full information from DEM subfiles but
>> better than nothing.
>>
>> There is a new option "--show-profiles" to enable or disable this feature.
>> Default is disabled.
>>
>>      
> How does this work? Does it still work if your contours are in a
> separate layer from the route-able ways?
>    
No it has to be inside the same layer. Alternative is creating a second 
transparent contourlines mapset - which will work in Mapsource >6.14.1.
> Does it assume that contours are defined by Garmin types 0x20, 0x21
> and 0x22?  If yes, then if you have a TYP file that uses these codes
> for something else, this option would go screwy, presumably?
>
>    
Presumably yes. There is extended types so using fixed lines (0x20-25, 
0x19???) for different stuff is a bad idea anyhow.
>
>