Where can I find shapefile (or other vector) data for US private parcel boundaries (such as for a plat map)?
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1You can get some counties for free: us-city.census.okfn.org/dataset/parcels– Jeryl CookCommented Oct 2, 2017 at 18:24
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5 Answers
Data for US federal lands can be found through the GeoCommunicator site. However, it does not cover the entire country.
For private parcels data are much less accessible. For these data you generally have to go to the GIS department for the county, or if there isn't one you may even have to digitize paper maps/plats.
Some private companies, such as maponics, which provides data to Zillow.com, have amassed a good database of private parcel data, but these data are not free.
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2Maponics looks like the answer, even though I was hoping for a free (or nearly free) online source. I'll wait a couple of days before accepting, in case someone has a better answer. I know this depends entirely on the local department, but in your own experience, are local GIS departments generally happy to provide this kind of data (if they have it)?– SWBCommented Dec 28, 2012 at 3:11
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Yes, I would say that they are generally happy to provide data. GIS department are limited by time, not regulations. You could also check with the local property assessor's office if the town or county doesn't have a GIS group. Realtors get data from them on a routine basis. I would guess that this is the primary source for Maponics' data.– katahdinCommented Dec 28, 2012 at 3:52
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If the locality (usually the county) has tax parcel boundary data they will usually make it available, but rarely for free in my experience (which is mostly limited to the mid-Atlantic region). The county tax assessor's office will usually be able to put you on the right track to getting a hold of the electronic data, if it exists. Some counties still don't have electronic versions and you'll need to digitize PDFs (or paper maps). Google Maps now has some parcel data but there is no attribute data associated with it (that you can query).– Dan CCommented Dec 28, 2012 at 4:36
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GeoCommunicator doesn't work with APNs (Assessor's Parcel Number) and only works with (land) lots for which you would also need several other pieces of information to get a boundary for. The GetTRS API on the Township Geocoder Service takes a lat & lng, but failed to resolve some of the coordinates (for residential properties) I put in. I'm also not sure what boundary level is returned (lot or bigger) from that API. Commented May 17, 2013 at 22:18
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The other GetLatLng API on the Township Geocoder Service seems to be the better solution, but that's the one that needs all those other params in addition to the (land) lot number. The docs for it say it needs: "A comma-separated String of Township Range properties describing a single PLSS survey area" which consists of the all these pieces of data I wouldn't have even if I could obtain the (land) lot number. Commented May 17, 2013 at 22:19
Report All website has a large data archive of parcel data per state/county (some states and counties are not included). You can purchase data per county via shapefile, kml, or excel.
answered Dec 28, 2012 at 15:01
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This is perfect. Simple to order pieces of data directly online. For my county, you can order data for individual parcels at $1.99 each or the entire county for $400 (which is beyond my budget for my current project, but overall a reasonable price). They also have some nice subscription integration with Google Earth. Thanks!– SWBCommented Jan 3, 2013 at 21:40
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Maponics would be it. I used to update the data they now use and it is the best in class, historicaly it was tele atlas data 'multinet', maponics spun off for the uses you describe. Nationwide polygon data would be very expensive i expect. a way to create a cheaper and much less accurate coverage would be use tiger data and polygonize by zipcode.
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2Maponics is a fairly priced solution for zipcode level boundaries, but that's about it. Parcel Boundary API web services are serveral thousand per month since they get their data from GIS Map Products who charges about 10k/month for nationwide parcel boundaries (Google is one of their clients). After speaking with a few sales reps at Maponics, it's $200 per county for a one time download that you'd use throughout the year and repurchase annually for updates. Not bad. Or they have a web service API for zipcode boundaries, but again "that would be in the high thousands per month". Commented May 17, 2013 at 22:25
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2@johntrepreneur , how do you think Maponics got the parcel boundary data? possibly contacted every county and digitized it? or do you think its generated and not official? Commented Jun 22, 2017 at 17:00
Maponics parcel data came from multinet as they are a spin off from Tele Atlas (now TomTom). Not in a legal but in a practical sense. Tele Atlas got the data from all stand alone sources and combined and optimized it. Of course now we are talking about Pitney Bowes, the new owner of Maponics.
Yes, the would get plat maps from municipalities if needed.
Tele Atlas had the best postal addressing as the worked with the USPS to improve their data. They also had there own database of deliverable (real) addresses and what P.O. was served those address: data even the USPS did not know and was then idealized that though logical processes.
Frequently county boundaries, state lines, municipal boundaries are very relevant to the addressing scheme. Tiger was very useful, in a general sense and was key.
Research by hundreds of editors further enhanced the process and automated processing was extensive.
Tele Atlas would buy but data if needed, or get it through sunshine laws. Other, newer data was gotten through real estate databases such as real quest.
At the time this was state of the art at the time and likely current processes are not as good as the company did major damage to the product when over leverage of financing occured as they where bought and merged with TomTom. This led to big cuts and large layoffs and inferior data and less data integrity checking.
You can build your application of top this Cadastral Mapping SDK.
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2Welcome. Please expand your answer, since the link may die at some point. In particular it would be helpful to explain how a SDK is the answer to a data question. Commented May 26, 2018 at 7:16