Q: I want to use your data, a map from OLIVER, or some other MassGIS derivative in a publication; can I do this, and do I need to cite you?

A: Since MassGIS data is paid for by public tax dollars, the data are in the public domain and therefore can be used by anyone for any purpose. When using MassGIS data on maps or in digital applications, source credit should be stated as "Office of Geographic Information (MassGIS), Commonwealth of Massachusetts, Information Technology Division"

Q: Why don’t I find actual maps as PDFs on your website?

A: As the State Mapping Agency, we house myriad digital map layers for use in GIS software. We have no way of knowing what combination of layers and in what geographic area(s) a user might want to see our data. If you do not have GIS software, you can use our OLIVER program to create an online map. Many of the datalayer description pages have a link at the top to a pre-made, yet dynamic, OLIVER map that displays the data.

Q: I was hoping to do some land property ownership research using your assessor’s parcel data.

A: While you can see the outlines of virtually every piece of property in the Commonwealth, there are some limitations.

  1. We do not have data for Boston
  2. Be sure to look at the “FY” field to determine the Fiscal Year of that record as some may be several years out of date

To get the most current info, you’ll need to visit the website of the city or town where the property is located and look for “Online Assessing” or the Assessor’s Office.

Q: Do you have a map layer showing Zip Code boundaries?

A: MassGIS does not have a distributable Zip Code layer. Internally, we use the proprietary one that came with our software.

Q: I saw your datalayers page , but did not see the layer I was looking for. Do you have additional data other than what I see there?

A: Most likely, if it is not listed there, we do not have the layer. We strive to collect, aggregate and publish any and all statewide data we can. Often our users are looking for temporal data or very specific (and sometimes obscure) layers that may not exist. Consider what agency might have the data you need (transportation-MDOT, environment- EEOEA, health-DPH, etc) and contact them.

Q: I saw your orthophoto/aerial imagery options on the datalayers page , but do you have anything older?

A: We do not have anything older than the 1990's. The MassDOT Highway Division’s Survey Section has historical aerial photographs.  There are statewide sets from the 1930’s, the 1950’s, the 1960’s, and another set from the 1980’s.  Although they are referred to as statewide sets, they all have omitted areas. There are also sets of photography that were taken along certain swaths or corridors for proposed highways or highway improvement projects.  The aerial photographs for the most part are indexed and organized.
There is a procedure in place for anyone looking for images and they charge for time and materials.  One would fax a request to the Boston Survey Section (617) 973-7065.  The request should include a street map identifying the area of interest along with a written description of the photography needed (year, scale, etc.).  If you have specific questions regarding the procedure, please call Evanson Browne at 617-973-7783.

Q: We're building an application or website and would like to tap into your database via web mapping services; how do we do this?

A: Please visit our webservices Wiki at: https://wiki.state.ma.us/confluence/display/massgis If the info you need is not there, please contact aleda.freeman@state.ma.us 

Q: I have a spreadsheet of addresses, how do I map them?

A: Here is one "free" method: https://wiki.state.ma.us/confluence/display/massgis/Google+Fusion+Tables+-+turn+a+spreadsheet+of+addresses+into+dots+on+a+map

 


Last updated 6/27/2014