[mkgmap-dev] Memory problems since 1245

Wed Oct 7 00:08:21 BST 2009


Charlie Ferrero wrote:
> 
> 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
>>>
As an update, I've tried running mkgmap on this coastline extract (the 
OSM input file is about 90MB.) but after two hours there is still no 
sign of anything and not even an empty .img file has been created.  Java 
is chuntering away at 50% CPU utilisation.

I assume this isn't right - but can anyone who has successfully got 
--generate-sea to work let me know how they can tell it is working or not?


-- 

Charlie