[talk-au] PSMA Administrative Boundaries

[Ewen Hill]

Good afternoon all,
   Firstly, I assume that this has been an issue elsewhere in the world
where a large body of official data over a wide area needs to be integrated.
Is there a way of going out to other countries and seeing how they worked it
and what lessons they learned.

My plan would be to make a web based system outside OSM by having an
external web db having both the PSMA and the current OSM suburb level data. 
Both would be updated daily automatically and identify
1. Where the PSMA is completely missing from OSM
2. Where OSM data is completely missing from PSMA or duplicated (two suburbs
of same name) or broken.
3. Where there are significant differences in size or overlap of the
polygons (sorted in order of mismatch)
4. Where there are small differences that can be taken as creek alignment or
a new roundabout and could be flagged as potentially a false positive.

In that way, we can attack the list, suburb by suburb from 1 to 4. A map
could be made of the the PSMA location and have all associated nodes and
ways displayed and mathematically provide a best solution for the editor to
consider. It may use portion or entire existing lines or it may be easier
just to down load the new suburb and have the other suburbs meet it
manually. 

Once the editor has decided the approach, it creates a data set and then
sends them to their prefer editor to make sure all is good. The old boundary
is tagged as well as the new one correctly. 

The entire system doesn't need to be built immediately, just the variation
list perhaps. Happy to help further. 

This process removes a lot of risk out of the equation and allows for
constant monitoring however is clerly slower than a bulk update by state.

Your thoughts?



--
Sent from: http://gis.19327.n8.nabble.com/Australia-f5416966.html