[mkgmap-dev] Problem Generating gmapsupp.img

Sat Mar 21 17:10:06 GMT 2009

Steve Ratcliffe wrote:
> Hi Andy
> 
>> Have you been able to make any progress on the map transparency? Any  
>> ideas when you might be able to add this feature? :)
> 
> Yes, it should be in there if you grab a recent build.
> 
> You use the --transparent option.  Let me know your results.
> 
> ..Steve

Hi Steve,

I must be making a silly mistake because I cannot get it to work. I am 
using mkgmap revision 985. Here are my test files:

   http://files.britishideas.com/index.php?dir=mkgmap/

osmfile.tar.gz contains 53255092.osm, which is a set of contour lines.
63255092.img is a previously generated OSM map tile for the same area 
covered by the contour lines. This area is 1 deg x 1 deg in eastern 
Switzerland.

If I do:

$ java -Xmx1560M -jar ./mkgmap.jar --style-file=./mapstyle 
--name-tag-list=ele,name ./53255092.osm

$ java -Xmx1560M -jar ./mkgmap.jar --gmapsupp ./63255092.img ./53255092.img

then I see the map on my GPS unit (Garmin Colorado) but contour lines 
only. This is expected because I didn't use the transparent option.

However if I then use the transparent option for the contour lines img file:

$ java -Xmx1560M -jar ./mkgmap.jar --style-file=./mapstyle 
--name-tag-list=ele,name --transparent ./53255092.osm

$ java -Xmx1560M -jar ./mkgmap.jar --gmapsupp ./63255092.img ./53255092.img

then the map doesn't appear on the GPS unit at all. It's listed in the 
set of available maps on the menu though.

Any ideas what I am doing wrong?

thanks, Andy

-- 
Andy
PGP Key ID: 0xDC1B5864