The car sharing service Zipcar is history in Austria since 2017. There seem to be just a few car sharing nodes left in Austria. Need to check if the operator has been changed or if the place is gone.

It seems that we have no concept for the parking zones in Graz, see: https://www.graz.at/cms/beitrag/10072106/7922687/Parken_in_Graz_Blaue_Zone_%7C.html

I made a proof-of-concept where I tried to map a street here:

• osm.org/changeset/90146543
• osm.org/changeset/90146635

I will have to discuss this with the OpenStreetMap Graz community.

Today I noticed some ways which are tagged with “railway:lanes” in Graz, but no Wiki-Page exists for such a key: osm.wiki/Key:railway:lanes

I assume this key is wrong and I will start to remove them. (If I am wrong please correct me).

The overpass-turbo link to all ways with a key “railway:lanes”: https://overpass-turbo.eu/s/Xxo

According to Wikipedia there are four main tennis surfaces types:

• Clay courts
• Grass courts
• Hard courts
• Carpet courts

But when looking at the “sport=tennis’ tag the English and German Wiki pages are note very accurate about the tennis court surface types. The English page does not recommend any “surface” values but refers to the Wiki page (which is ok), but the German page talks about “clay”, “asphalt”, “grass” and “sand”.

But when looking at the”surface” key, only “clay”, “decoturf” and “carpet” are connected with tennis.

“DecoTurf” is a special tennis hardcourt product manufactured by an US company. I think we should avoid using “surface=decoturf”.

When checking taginfo of “sport=tennis” you can see more than 96% of them are combined with “leisure=pitch” but only less than 9% have a “surface” tag. Most of them are “clay”, followed by “paved”, “asphalt”, “concrete” and “sand”. (Next to) none of them are tagged with surface “grass” or “carpet” (or even “decoturf” (good!))!

I am not sure yet, how to tag hard courts (I tend to “hardcourt”), but we should only use the following values for “surface”:

• clay
• grass
• hardcourt
• carpet

Today learned about https://geoportal.dgu.hr/ the Geoportal by the University of Zagreb (Thx to morlautrer for pointing me to this!).

This is a valuable source to check the street names when mapping in Croatia.