OpenStreetMap

Questions about parking mapping

Posted by chtfn on 18 June 2013 in English (English)

Hi all!

I had a few questions about how to map parking spaces. Here is an image of the zone, and coordinates are linked in the post:

The zone

There are two things: - The two parking lanes have the number of parking spots and the number of disabled parking spots. Should "Capacity" include or exclude the number in "Capacity:disabled"? - The highlighted point on the left, along Boggo road, is my attempt at mapping a single disabled parking space. I thought a point would be better than an area for a lone parking space, am I right? What do you think? The previous question applies here too: do I need to tag it with Capacity=1 and Capacity:disabled=1?

Cheers, and happy mapping! :)

Location: Dutton Park, Brisbane, Queensland, Australia

Comment from BCNorwich on 18 June 2013 at 06:48

Hello Chtfn,

IMHO I would say that to map the parking area/areas is the most important thing and the access into those areas, (one needs to know the route to access them). If the disabled/motorcycle areas are separate then map their areas separately with the routes into them. All the parking areas are then tagged with all their appropriate parking conditions including disabled where applicable. If the main car park area contains an area for specific parking types ie disabled/family/motorcycle then that area could be mapped and tagged as the case determines. If the disabled area within the car park cannot be independently mapped but the approximate area is known then a node could be tagged as the disabled parking area. To further enhance the rendering of the map nested areas could be mapped as multipolygons, (areas within areas).

At the moment your disabled and motorcycle parking looks out of place, is it for the school, police station or goal? Also how can it be accessed, one can't tell from the mapping.

Just a few thoughts as you requested, keep up the good work.

Regards Bernard

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Comment from aseerel4c26 on 18 June 2013 at 22:31

@"Should "Capacity" include or exclude the number in "Capacity:disabled"?" See http://wiki.openstreetmap.org/wiki/Key:capacity "Including all special lots, e.g. parking spaces for disabled drivers"

Points do abstract more than an area if you use them for realworld objects which are in fact an area. However areas are harder to draw (accuracy?!). I think a point is really fine for a single space.

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Comment from chtfn on 19 June 2013 at 08:25

Hi Bernard and aseerel4c26

Thank you both for your input!

The detail in Key:capacity escaped my attention. However, this brings another question: in the case of the single parking space, should I still use Capacity=1 even though I already have Capacity:disabled=1, i.e. is a the value of a parent key implied when only a more specific key is used and has value already?

Here is a quote from the Tag:amenity=parking page on the wiki: "Use a node for smaller car parks, or an area for a larger car park (but not both for the same facility) and tag it with amenity=parking. If you don't know the actual car park area or don't have time to draw it out then just tag a node." It kind of makes sense to use areas to be as precise as possible, I guess it is the goal of the project (a map that is readable even without a satellite imagery background).

Regarding your question, Bernard, the single disabled parking spot is along the street, and the motorcycle space is sort of on the sidewalk, between the street and the school parking access. (The closest Bing zoom is not up to date.)

I will have a look into mapping more precisely and adding access roads.

Thanks again! :)

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Comment from aseerel4c26 on 20 June 2013 at 23:54

@chtfn: yes, if you can and want to - draw it as an area. I don't know if you "should" use capacity=1 in that case, but at least you can. If you use it, I guess there will be some applications (which use OSM data) which will show that there is a parking space with capacity 1 because these applications may not read the sub-value :disabled. Well, their fault? I don't know. Good question, next question. ;-) According to the definition text on the wiki page I think you should use capacity and capacity:disabled. However, it may be meant for larger parking spaces where usually there will be more general (non-disabled) parking places ... Forum, mailing lists or talk page on the wiki could be a better place for such a discussion. Oh, there is already a discussion about this: Talk:Tag:amenity%3Dparking#Count_disabled_spaces_in_capacity.3F! Have a look there.

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Comment from chtfn on 21 June 2013 at 00:47

Thanks for your comments! I might participate in the discussion, it seems there is a lot to debate about concerning parking spaces :) I will definitely be using OSM help and the wiki talk pages more for this kind of questions, instead of my diary. Learning lots, thanks everyone!

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