[Qgis-developer] New OpenStreetMap integration

[Mathieu Pellerin]

Martin,

Nice, glad the OSM download/import support is being worked on.

I've just tried to import two OSM files: one which I had saved through
JOSM, and the other one downloaded just now via your Download OSM Data
dialogue. With both files, QGIS fails to import data with this error:

Failed to import OSM data:

Error executing SQL command:

wrong number of arguments to function InitSpatialMetadata()

SQL:

SELECT InitSpatialMetadata('WGS84')


Running on a osgeo4win master build (revision 3e8be6c).


Best,


Mathieu



On Fri, Mar 1, 2013 at 4:35 AM, Martin Dobias <wonder.sk at gmail.com> wrote:

> Hi all
>
> so finally I have pushed my initial work on OpenStreetMap integration
> to master... d'oh I have missed The Open Data Day (Feb 23) by few
> days! The idea is to completely replace the current OpenStreetMap
> provider and plugin. As announced in the list before, the new OSM
> support is read-only and right now I have no plans to add editing
> functionality. Editing would mean a _lot_ of work - map tools,
> tracking of changes, conflict resolution - and there are already great
> programs for editing OSM data.
>
> If you would like to test the new stuff, go to menu Vector >
> OpenStreetMap. No need to enable any plugins. The workflow should be:
> 0. get OSM XML file (from web or download in GUI)
> 1. import XML file to a SQLite topology database (once)
> 2. export SpatiaLite layers from topology with a fixed set of tags -
> attributes
>
> Integrated download uses Overpass API, so you should be able to
> download data from any extent size. The download server in GUI is
> currently fixed to overpass-api.de. When using download, make sure to
> set high timeout (Options > Network > Timeout for network requests) -
> currently there's a problem with QGIS network manager - it will time
> out after the fixed time even if the data is being continuously
> received.
>
> The work is by no means complete, there are various pieces missing,
> though it should be already usable. Some features I would like to add:
> - advanced download queries (e.g. filtering by tags)
> - filtering on export (e.g. export only railroads, only restaurants)
> - python bindings
> - support for relations
> - identification GUI (e.g. see all tags, even those not exported)
>
> There is a low-level API in qgis analysis library which should allow
> 3rd party tools/plugins do some work with OSM data (currently
> QgsOSMDownload, QgsOSMXmlImport and QgsOSMDatabase classes).
>
> Please let me know what do you think about it or if you encounter any bugs.
>
> I will be removing the OSM provider+plugin very soon. This is another
> piece from the master plan for removal of old symbology (OSM provider
> implements a renderer based on old symbology).
>
> Martin
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