[QGIS-Developer] Reading OSM data from .osm file

[matteo]

Hi Marco,

thanks for the answer and the explanation.

> I guess you are missing an understanding for OSMs data model. OSM is
> very flexible in adding attributes to a feature by adding key/value
> pairs. If this is to be represented in a GIS data away (table) you have
> to convert the data importing just relevant keys (each becoming a
> column), which results in loss of some attributes, or you can use
> something like hstore in postgresql [1] meaning you store the set of
> key/value pairs (or dictionary in python-terms) in one column. This is
> lossless and seems to be what is used here.

well I think that even if lossless the information are pretty much
useless also.

What I'm saying is that the old OSM core provider of QGIS 2 (download
osm and convert osm to SpatiaLite) and the current QuickOSM plugin (both
QGIS 2 and QGIS 3) stores all the information as well, having maybe a
lot of columns empty, but still usable.

Cheers

Matteo