On Fri, Mar 2, 2012 at 2:59 PM, Johan Joubert <[email protected]> wrote:
> Hi,
> maybe one reason why Joburg is below the Gauteng average: we've been
> actively capturing shopping centres (as comprehensively as possible) using
> data from the South African Council for Shopping Centres. It forms part of
> one of our research projects in transport modelling. We also capture the
> service roads and parking aisles... note that these have tags:
>
> highway=service
>
> and the parking aisles have an additional tag:
>
> service=parking_aisle
>
> We started with Gauteng, and look at, for example
> http://www.openstreetmap.org/?lat=-25.87826&lon=28.16376&zoom=17&layers=M
> and
> http://www.openstreetmap.org/?lat=-26.01694&lon=28.00689&zoom=16&layers=M
>
> ... and you'll quickly see that there are MANY roads that don't have (and
> don't NEED) names. I think all-in-all the OSM is improving quite rapidly.
> And with the National Geospatial Institute data coming online in the near
> future, progress will accelerate even further. WELL DONE OSM COMMUNITY!
>
> In the near future we will be the culprits when Eastern Cape's
> road-name-percentage will quickly be dropping too ;-) ... and then the rest
> of the country.
>
> I guess we just need to find another, or tweak the metric a bit: maybe you
> can check what the percentages are if we IGNORE service roads.
>
> Johan
> (OSM: JohanWJoubert)
>
That's great news :)
As for the "service" ways in Gauteng:
$ bzcat gauteng.osm.bz2 |grep 'k="highway"'|sort|uniq -c
1 <tag k="highway" v="abandoned"/>
2 <tag k="highway" v="bajadam"/>
32 <tag k="highway" v="bridleway"/>
42 <tag k="highway" v="bus_stop"/>
30 <tag k="highway" v="construction"/>
33 <tag k="highway" v="crossing"/>
1 <tag k="highway" v="cycleway"/>
1292 <tag k="highway" v="footway"/>
3 <tag k="highway" v="ford"/>
179 <tag k="highway" v="living_street"/>
575 <tag k="highway" v="mini_roundabout"/>
803 <tag k="highway" v="motorway"/>
258 <tag k="highway" v="motorway_junction"/>
1155 <tag k="highway" v="motorway_link"/>
164 <tag k="highway" v="path"/>
40 <tag k="highway" v="pedestrian"/>
4 <tag k="highway" v="platform"/>
1322 <tag k="highway" v="primary"/>
340 <tag k="highway" v="primary_link"/>
1 <tag k="highway" v="racetrack"/>
1 <tag k="highway" v="raceway"/>
42828 <tag k="highway" v="residential"/>
149 <tag k="highway" v="road"/>
1733 <tag k="highway" v="secondary"/>
112 <tag k="highway" v="secondary_link"/>
1 <tag k="highway" v="servi"/>
3849 <tag k="highway" v="service"/>
2 <tag k="highway" v="services"/>
3 <tag k="highway" v="speed_camera"/>
52 <tag k="highway" v="steps"/>
52 <tag k="highway" v="stop"/>
1 <tag k="highway" v="taxi rank"/>
1344 <tag k="highway" v="tertiary"/>
8 <tag k="highway" v="tertiary_link"/>
1061 <tag k="highway" v="track"/>
1553 <tag k="highway" v="traffic_signals"/>
37 <tag k="highway" v="trunk"/>
27 <tag k="highway" v="trunk_link"/>
778 <tag k="highway" v="turning_circle"/>
5589 <tag k="highway" v="unclassified"/>
2 <tag k="highway" v="unclassified_link"/>
(I thought the tagging guidelines said we didn't use "tertiary"?)
Many other than "service" need to be excluded, so with "residential"
and "unclassified" only:
Gauteng "residential" and "unclassified":
48141 total
22357 with names
46.44% named
Joburg "residential" and "unclassified":
38766 total
17099 with names
44.11% named
Slight improvement but Joburg is still below Gauteng. Pretoria must be
99% finished or something.
Damjan
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