[Talk-us-massachusetts] Adding new open space parcels to the inventory

[Jim Snyder-Grant]

In addition to Alan's thorough answer, I'll mention that in Acton we had to
do some corrections: the L3 data is pretty good, but if it doesn't line up
with what you know, you may be right. We ended up looking at deeds and then
asking our town's GIS department to do some resurveying of some selected
bounds.

I see that Westford hascontracted to have a public GIS viewer, available at
https://www.mapsonline.net/westfordma/index.html  It has a layer for public
lands,  a layer for CRs, a layer for seeing Open Street Map data, and a
layer for parcels. Either they might have the data you need, or, if you
develop some new data, they might benefit from it. We've been in touch with
our Town's GIS department to share data and corrections to it back and
forth.

Jim Snyder-Grant
18 Half Moon Hill
Acton MA 01720
508 572-2985


On Wed, Dec 6, 2017 at 8:03 AM, Alan & Ruth Bragg <alan.ruth.bragg at gmail.com
> wrote:

> Good question Marc.
> I'm using JOSM and use the Mass GIS L3 imagery layer to see both outlines
> of open space and house numbers. It's available in the Imagery Preferences
> tab. If you're using ID you can load this layer as "custom imagery" (found
> under the "layer" icon)
> You need to enter
> http://tile.osm.osuosl.org/tiles/massgis_parcels/{zoom}/{x}/{y}.png
>
>
> The latest GIS data for all MA towns is available at
>
> http://www.mass.gov/anf/research-and-tech/it-serv-and-suppor
> t/application-serv/office-of-geographic-information-
> massgis/datalayers/download-level3-parcels.html
> <http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/l3parcels.html>
>
> Look for your town in the list and download file in the "ESRI Shapefiles"
> column.
> Unzip the downloaded file. There will be 9 files, open the M330TaxPar.shp
> file (the 330 here is Westford), there are 2 shp files, you want the one
> with the  SHP extension, not the XLM file.
>
> This will open in a new data layer in JOSM. Be careful here and *never*
> upload that layer to OSM. Your OSM data should be downloaded to another
> layer.
> You can view both layers at the same time.
>
> Contact me if you have a problem. One of the best thing going in
> Massachusetts is people from trails committees taking ownership for their
> towns. I suggest you make your trails highway=path and add operator=(your
> trail committee name)
>
> There's another way to get Mass Open Space data from Oliver. Let me know
> if you're interested.
> Alan
>
> Alan
>
>
>
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>
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