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[mkgmap-dev] Memory problems since 1245

From Charlie Ferrero charlie at cferrero.net on Tue Oct 6 21:10:11 BST 2009

Carlos Dávila wrote:
> Charlie Ferrero escribió:
>> Clinton Gladstone wrote:
>>> On Tue, Oct 6, 2009 at 12:11 PM, maning sambale
>>> <emmanuel.sambale at gmail.com> wrote:
>>>> I am interested in this approach as well.  Can you please post the
>>>> howto for this?
>>>> In our areas the sea gets broken sometimes due to newbie editing it
>>>> would be good if I have a permanent sea osm file to create a onetime
>>>> sea polygon.
>>> OK. I don't have my files here and I'm about to go on vacation, so
>>> I'll try to list the steps here from memory:
>>> 1. Copy the style files to a new directory. Use this for the new
>>> coastline styles.
>>> 2. In the new directory, remove everything from the points file,
>>> remove everything except coastline from the lines file, and remove
>>> everything except sea (or ocean) from the polygons file. (You might
>>> have to add a sea polygon; I can't remember.)
>>> 3. Compile the map with appropriate options to use the coastline style
>>> files, and to generate sea polygons.
>>> - Make sure you give the new map a unique family ID, and unique file names.
>>> - Set draw-priority to a low number (I used 10, I believe).
>>> - You can leave away a lot of the other options (such as routing) as
>>> they are not relevant for this map.
>>> - If your map is small enough, you can run mkgmap on the entire osm
>>> file instead of splitting it. (I would imagine that the Phillipines
>>> would be small enough.)
>>> - Set an appropriate map description, so you can easily recognise the
>>> coastline map when you install it on your GPSr.
>>> 4. Wait a while for the map to generate. The generate-sea option
>>> appears to always take a fair amount of time.
>>> 5. Install the map you just generated into MapSource/Roadtrip, or save
>>> it for separate combination into a gmapsup file.
>>> 6. Compile your regular map. Make sure to set the transparent option,
>>> and to ensure that the draw priority is higher than the coastline map
>>> (I think 25 is the default draw priority.)
>>> - Of course, do not use the generate-sea option here.
>>> - Also remember to use unique family IDs, map file names, etc.
>>> 7. Install this map into MapSource/Roadtrip, if you use them.
>>> 8. Combine the two maps into one gmapsup file on the GPSr, using
>>> MapSource/Map Install, or use another tool of your choice to create a
>>> combined gmapsup file.
>>> Once you install the maps on your device, you can also select and
>>> deselect the entire maps for display.
>>> - On an eTrex you can do this by paging to the map setup page.
>>> - On a Nuvi you can do this by navigating to the map options area.
>>> As others have mentioned, you can use a similar technique to create
>>> map overlays with contours or other information. Just compile with an
>>> appropriate new style file, a higher draw-priority, and the
>>> transparent option. For example, I have created an overlay for public
>>> transit in Toronto, Canada which I can turn on and off at will if I
>>> want to find the nearest subway, tram or bus line.
>> To make life easier, you could craft an XAPI call just to download the 
>> coastline for a particular area of interest (makes the OSM file much 
>> smaller so more likely that you'll have enough memory to process it). 
>> I've been trying with
>> wget 
>> http://www.informationfreeway.org/api/0.6/way[natural=coastline][bbox=9.31641,49.49668,2.28516,61.27023] 
>> -O UK_coastline.osm
>> but it doesn't seem to work.  Does anyone have any experience of XAPI 
>> and know where I'm going wrong?
> I have just used wget
> http://osmxapi.hypercube.telascience.org/api/0.6/way%5Bnatural=coastline%5D%5Bbbox=-9.580078125,41.044921875,-4.04296875,43.9453125%5D
> -O yuorfile.osm and it to worked fine.
> Cheers
> Carlos
Yep, my fault: I omitted a - sign on the very first bound.  It's working 



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