[mkgmap-dev] Line TYP Collision between two different maps

Wed Feb 21 18:36:37 GMT 2018

Hello,

I am seeing a collision between custom line TYPs when I generate two 
different .img files (different Map IDs (--mapname= parameter to 
mkgmap)).  Here is what I am seeing and was wondering if anyone could 
offer ideas:

Map 1 : TYP file : Type=0x100001 (solid red), contains a single line
Map 2 : TYP file : Type=0x100001 (solid green), contains a single line

Both .img files get loaded into my gps (montana) and are enabled and 
both lines show, however, map 2's lines shows as red, not green, as 
expected.  If I disable map 1, map 2's line still shows *incorrectly*. 
If I delete map 1 form the gps, then map 2's line shows correctly. I 
thought that each map had its own TYPs and the GPS would sort out which 
TYP to display for each map's line.  It seems that the gps unit is 
getting confused or caching the line TYPs from the "first loaded" map 
and using those for subsequent maps.  If it were true that an earlier 
loaded map's custom TYPs override later loaded maps, how would it be 
possible to sort out custom types across different maps?

Another thought I had is that since both my maps share the same family 
id and product id, could this be causing the collision?  I cannot find 
any decent documentation on what family id and product ID are supposed 
to be.

Thanks for your help,

Scott

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