[gdal-dev] osm_id vs osm_way_id?
issworld2000 at yahoo.com
Thu Dec 1 11:35:30 PST 2016
I am converting an .osm file to shapefile, and there is one thing that I do not understand:
What is the difference between: osm_id and osm_way_id fields (keys)?
They are defined in osmconf.ini file, but only for [multipolygons].
Here is an explanation from the osmconf.ini file:
# note: for multipolygons, osm_id=yes instanciates a osm_id field for the id of relations
# and a osm_way_id field for the id of closed ways. Both fields are exclusively set.
Does that mean that osm_way_id will be used to represent the osm id number of a closed way, while osm_id will only be used for to represent the osm id number of relations?
It's a bit confusing concept.
What makes the closed ways so special so that they need to have their own special field (osm_way_id)?
Why wasn't there a separate field for relations instead: like: osm_relation_id, while closed ways would use the osm_id.
Thank you for the reply.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the gdal-dev