My own practice for large urban areas (last experience was a Canadian
city rather than a HOT task) is to carve them up into multiple
landuse=residential areas, bounding them on roads or other landuse
types. As much as possible, though, I avoid actually making the
boundaries/roads touch each other, because of bad experiences correcting
boundaries from imagery -- if the boundaries touch you have to detach
them before you can correct the ones in error. Thew implication is that
there is, say, a meter of unlabelled space between one entity and the
next, but I can't see that mattering.
Tom Taylor
On 22/11/2014 9:51 AM, althio forum wrote:
My previous message leads me to a more generic question.
In http://tasks.hotosm.org/project/767 and maybe some other project,
the instructions reads:
"Settlements:
Trace polygon around clusters of houses. Tag with landuse=residential"
I feel these instructions are related to rural areas. They can be
misunderstood in the context of urban areas. In this project we are
also mapping inside Bamako, very urban and very dense.
What about urban areas? What is the good pratice, the recommended size
for landuse=residential in Bamako and other African big cities?
* Only one huge outline landuse=residential around the whole city
* By neighborhoods?
* Cut by main roads (arteries of the city)
* Block by block
As I map and review I see almost every case.
Has this been discussed or documented already?
althio
On Sat, Nov 22, 2014 at 3:29 PM, althio forum <[email protected]> wrote:
Hi HOT
Please have a look at this patchwork of small residential clusters and
mix of cultivated gardens, lawns, orchards...
This is currently mapped as surrounding landuse=farmland with
inclusion of landuse=residential.
https://www.openstreetmap.org/#map=18/12.612159/-7.978204
How would you handle this?
My personal opinion is:
* These small gardens do not qualify as farmland.
* The surrounding should be landuse=residential
* Green inclusions as leisure=garden / landuse=orchard
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