Generating mwm files with custom data

[cbosdo]

Hello,

I have recently discovered organic maps to your Google Summer of Code representative at the mentor summit and started using it. I have a piece of code generating osmand data file from the fuel prices published by the french government and would like to generate those data for Organic Maps. I have found the maps_generator tool, but I still fail to see how to go from .osm files to .mwm. Would you have some code pointers to get me started in that task?

My existing code uses osmand's tools, which are storing everything in memory. Ideally I would like to process the data in a stream to run it on my RPi B... but that would be the cherry on the cake.

[boswellp]

I managed to create .mwm files (from .pbf downloads from Geofabrik) on Ubuntu 18.04. I'll write up the process. My problem now is to somehow store an .mwm file in the organicmaps app data folder. One can get at the data folder by connecting an Android phone to a PC (I use a Pixel 4a phone).

[cbosdo]

That would be awesome for newcomers like me, thanks a lot.

[twmaps]

Hi @boswellp can you share the guidelines or documentation or creating .mwm files from .pbf downloads from Geofabrik? I am try to develop route able app for my university project.

[AhmadWork]

Hi @boswellp
I'm working on a project that try to add extra data for the mwm maps and would love to know the process you used to generate the mwm files.

[manylittlestorms]

I managed to create .mwm files (from .pbf downloads from Geofabrik) on Ubuntu 18.04. I'll write up the process. My problem now is to somehow store an .mwm file in the organicmaps app data folder. One can get at the data folder by connecting an Android phone to a PC (I use a Pixel 4a phone).

Can you share a step by step guide? I am interested too.

[cbosdo]

The more I look into the code and the app, the more it seems this could be a cool feature: getting gas prices in the PlacePageView could be nice. I think I could somehow try to match the data with the prices with the OSM nodes to provide those additional data directly in the existing gas station objects. I have no clue how extensible is this would be possible / desired to include these data in the mwm files and the UI. It's clearly not a simple project sadly.

Another problem is the data accuracy from french gas prices... some stations have wrong lat/lng and searching may be tricky when there is a station on each side of a road. In the Osmand version I was just creating a new gas station object with the prices as name. May be that would be a first step here?

[cbosdo]

Here is a first attempt at a service implementing such an API: feel free to comment on it: https://github.com/cbosdo/gas-price. Note that I am not hosting it anywhere for now.

[cbosdo]

The fetcher reports the inconsistencies between prix-carburants.gouv.fr and OSM. I started addressing some of them, but there are about 280 of them

[wadouk]

Hi, I manage https://openfuelmap.net
Get some trouble but all was fixed.
Which kind of inconsistencies did you find ?

[cbosdo]

Hi, I manage https://openfuelmap.net Get some trouble but all was fixed.

Nice ! I'll take a look. I wonder if we could somehow merge my approach and yours.

Which kind of inconsistencies did you find ?

You can build and run the fr fetcher I wrote: the output reports gas stations that have a ref:FR:prix-carburants tag not matching an ID on prix-carburants anymore and also reports those from prix-carburant that can't match an OSM node or way with amenity:fuel tag. I have some changes locally that try to match for a nearby node to suggest changes in OSM data.

My goal was to have something as lightweight as possible: that's why I didn't go with a GIS postgres like what you did. What we need for this discussion is an API that provides the prices from an OSM node/way ID... this it probably something that could be done with openfuelmap. I wonder however how we could use those data offline in organicmaps.

[wadouk]

I can make available to download the full data merged / conflation between both sources.
I have an issue to match every day gas stations.

Maybe some osmose analyse could help to do the trick. Already one exist to map gas stations.

Having an API endpoint to get data for an osm id could be done quiet easliy. PR welcome.

[cbosdo]

Note that I managed to work around my original problem by exporting the french gas prices as KML files. It's quite nice to use, but still requires to manually import the files