[Imports-us] Import address points for Kokomo, IN
Eric Jiang
eric at doublemap.com
Sat May 3 01:35:10 UTC 2014
After getting the processing scripts written,[0] I've generated a few
sample data files.[1]
This process was a bit unusual because I had two data sets to work
with: one set with house numbers and street names on parcel centroids
for the city, and one set with house numbers, no streets, on buildings
for the whole county.
By cross-referencing the two sets of data, I was able to come up with
a set of "trustworthy" address points that are corroborated in
both.[2] As a side product, a set of "potentially good" points was
generated where points could not be corroborated.
No tags other than addr:housenumber and addr:street were used.
Common errors are:
* Points for empty parcels in new subdivisions, where it's obvious
that the neighborhood is still being built. Could be outdated imagery
too. (guidance appreciated)
* Apartment complexes lacking good address points. (don't import)
* Mobile home parks with many duplicated points or a single point for
the whole park. (don't import)
* Long, skinny parcels where the parcel centroid and building point
were too far away for the cross-referencing script. (manually review)
* New neighborhoods that exist in one set but not the other. (manually review)
* Large empty parcels (or farmland) that exist one one set. (don't import)
* Random points that are inexplicably missing from one set. (manually review)
The sample data was arbitrarily chosen out of the downtown residential
area, where it's somewhat less complete than the suburbs. Some of the
points can be manually filled in from either original data set.
Generally, the suburbs had the best data quality.
I can provide more data if people want to take a look. I'm still
tweaking little things in the code, but if the data look good, then
the next step would be to write a script to split up the data into
little chunks and then manually import each chunk.
Thanks,
Eric
[0] https://github.com/erjiang/kokomo-addresses
[1] https://github.com/erjiang/kokomo-addresses/tree/master/samples
[2] https://github.com/erjiang/kokomo-addresses/blob/master/samples/kokomo_sample_crossreffed.osm
--
Eric Jiang, DoubleMap
Suite 300W | 748 E. Bates Street | Indianapolis, IN 46202
www.doublemap.com | Office +1(855) 463-6655
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