[Talk-us-massachusetts] Some observations and preliminary stats on MassGIS address import

[Greg Troxel]

Yury Yatsynovich <yury.yatsynovich at gmail.com> writes:

> Having visualized the data in QGIS I've noticed couple of issues:
> 1) some points lie outside, yet, very close to a building so that it is
> unambiguous to which building they belong. Maybe creating a small buffer
> (5-10m) around such points and merging them with unique buildings that
> these buffers intersect can help match them.

That sounds good, perhaps with an added check that the address point is
not close to any different building.  I mean that if it's 5m away, but
2m from another building, that's not a match.  But it the next-closest
building is 50m away, that's fine.  I suspect a small tolerance and a
10:1 closer-to-this-than-others will let you match up a vast amount of
points, and then it will again be interesting what's left.

> 2) some points, as it was mentioned in previous messages, are assigned to
> parcels. E.g. there are many cases when a group of buildings (a house and,
> say, barns)  have an address point next to them. It could be possible to
> identify a house among those building manually and add the address only to
> it, yet, as there might be several thousands of such cases, it can be very
> time consuming. So, for parcels I would suggest simply adding an address
> point in the middle of a parcel (as it is placed in MassGIS) without
> identifying the exact building to which the address belongs.

How many of these are there?

(And your approach here seems ok to me.)