Am 27.09.2016 um 10:44 schrieb Walter Nordmann:
Hi Dewi,
Am 27.09.2016 um 07:46 schrieb Dewi Sulistioningrum:
Hi Walter,
Before I plan to upload the boundaries import data for Surabaya, I
have received some feedback and helped by Ivan Garcia
<https://wiki.openstreetmap.org/wiki/User:Capiscuas> who has
expertise in correcting boundaries and has previously worked with us
in settling Jakarta boundaries.
yes, but is no anwers about your experence. The script of Ivan looks
fine and i'll check it with real data - of course without uploading.
The current raw file has the boundary relations already, which I
think is quite accurate. I will send the link to the raw gis data
when it's uploaded on github.
It's not a question of *data quality*, it's a question about the
*technical way* adding boundary relations as multipolygons to osm -
without damaging the "neighbourhood" and without deleting the old
releations with their history before. Ivan's script seems to do the
job in an empty area but does not respect the outer borders
("neighbourhood") and the history.
We had a lot of problems during such a task in Mexico Nov. '15 till
March '16 . See http://forum.openstreetmap.org/viewtopic.php?id=52477
They even damaged the international boundaries of the USA, Guatemala
and Belize. We had to stop them and they had to change a lot in their
working process. *Now* they know how to do this. ;)
In regards to the current boundaries in Surabaya, we had contacted
those who mapped them previously but they were unable to provide the
data license / approval and I believe our data which is formally
attained from Indonesian government is more accurate.
This was only an example of what did go wrong and may go wrong again.
At least at the edges of the import area.
I might need to clarify that HOT Indonesia, which is where I work
now, has not focused its work yet on the issue of data import due to
some problem attaining the data from Indonesian government and in
explaining about the sensitivity of it to Indonesian OpenStreetMap
Community. Thank you very much for your input, we plan to work more
on correcting this issue following OpenStreetMap procedures of
validating existing data and improving data quality in the incoming
project.
btw: Working with HOT - not OSM? Talking of OpenStreetMap Community
as an extra organisation? Strange to me. You are member of the OSM
Community too. But that is another "problem".
regards
walter
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