[Imports] [Talk-us] Boston, MA, USA addr:housenumber Import

[Jason Remillard]

Hi Roman,

The city of Boston building data set for buildings has address.

http://bostonopendata.boston.opendata.arcgis.com/datasets/492746f09dde475285b01ae7fc95950e_1

It seems like they have already figured out what address goes on what
building. Should this data set be used rather than the parcel data
set?

The licensing link says the following, it is kind of weird.

"The City of Boston recognizes the value and benefit gained by sharing
GIS data. Although the City has made reasonable efforts to provide
accurate data, the City makes no representations or guarantees about
the accuracy, completeness, or currency of the information provided.
The City of Boston provides this data as is and with all faults, and
makes no warranty of any kind. Each user is responsible for
determining the suitability of the data for their intended use or
purpose. Neither the City nor its affiliates, employees, or agents
shall be liable for any loss or injury caused in whole or in part by
use of any data obtained from this website. The GIS data is updated
and modified on a regular basis and users are encouraged to report any
errors to the City."

I suggest that you move forward with the building splitting, since it
is a manual process, it can proceed like a normal mapping activity.
While the buildings are being cut up, we can work on address import
and make sure it is good shape.  Before I would be comfortable with
the import, I would like to see some sample OSM files we can load into
JOSM to look over.

Jason


On Sun, Mar 20, 2016 at 2:52 PM, Roman Yepishev <rye at keypressure.com> wrote:
> Hi, all! Going back to the point...
>
> I stopped linking to the .osn files in order to minimize the confusion.
>
> Instead, every neighborhood gets their .gpx file with the details of
> the issues encountered at that particular address:
>  - Building is missing.
>  - Building has more than one address.
>  - Building has a street name that is not known to OSM or has not been
> added to the mapping.
>
> This will allow locating the issues quicker while surveying.
>
> I have also generated the .pbf file containing the last export of US,
> MA from Geofabrik + unique house numbers. Since I am using OsmAnd, I
> have also generated the .obf map. Basically, that's how OSM would look
> like if the current list of changes is applied.
>
> https://wiki.openstreetmap.org/wiki/Import/Boston_Street_Address_Manage
> ment_%28SAM%29_Import#OSM_Data_Files
>
> There was a question of the data accuracy earlier - I've spent the last
> 3 days spot-checking the building numbers and I have to say they are
> pretty accurate. Some buildings, however, have picked one number from
> the range assigned, and this will have to be rectified manually as
> well. The data from Boston Tax Parcel may help with that, but it's
> license is not completely clear.
>
> I found a couple of issues while generating the datasets/surveying the
> locations:
>  * Some of the addresses from MassGIS point to parks, monuments, or
> buildings are located a few feet away. While it may possible to assign
> the marker to the building nearby, I'd prefer not to do the guess work
> and leave it for refining in the future.
>  * Original OSM street names must have been imported from MassGIS
> roads, and a few of these don't correspond to the signs (something as
> minor as Conry Crescent Street vs Conry Crescent or slightly more
> interesting Glenvale Terrace vs Chestnut Terrace). So there are
> clusters of buildings in .gpx file pointing to possible street naming
> issues, which will have to be manually correlated with the signs on the
> streets.
>  * Multipolygon buildings are not supported by my script, so there will
> be up to 48 'missing building' false positives for the whole Boston.
>
> Overall, I feel pretty good about the quality of the data and would
> like to hear more about issues that I may have missed.
>
> --
> Sincerely,
> Roman Yepishev
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