{ "currentVersion": 10.51, "id": 21, "name": "MACRIS Historic Areas", "type": "Feature Layer", "description": "This public layer consists of points and polygons representing information from the MACRIS database and related records on file at the MHC, including the Inventory of Historic Assets of the Commonwealth, National Register of Historic Places nomination forms, local historic district study reports, local landmark reports, and other materials. The MACRIS database and the layers within the MACRIS Maps web application are updated regularly as new information is submitted and added, and as the accuracy of earlier versions of the datalayer is improved.Three datalayers are being made available to the public:The Inventory Points layer contains the locations of buildings, burial grounds, structures, and objects (e.g. statues, monuments, walls).The points layer is symbolized to indicate the most common historic designation types: 1) National Register of Historic Places, 2) local historic district, 3) both National Register and local historic district, 4) Preservation Restriction, and 5) inventoried but not designated with one of the previous designations. Less common designations are not symbolized in MACRIS, but are included in the Designationsattribute field (see below). MassGIS stores a copy of the point feature class as MHCINV_PT.The Inventory Areas polygon layer includes areas and districts symbolized in MACRIS in a similar manner to Inventory Points. MassGIS stores a copy of this polygon feature class as MHCINV_POLY.Another polygon layer, Towns, possesses a binary \u201cy\u201d or blank field to indicate whether MHC staff has completed digitizing the entire inventory for a specific town. Please note that new and updated information is added to MHC files daily, and that there may be considerable lag time before this information is reflected in MACRIS or in MACRIS Maps. Map information for \u201ccompleted\u201d towns may not reflect the most current information on file with MHC. MassGIS stores a copy of this polygon feature class as MHCTOWNS_POLY.For additional information, users may consult the source records, forms and maps that make up the official Inventory of Historic and Archaeological Assets of the Commonwealth, on file at the MHC, Massachusetts Archives Building, 220 Morrissey Boulevard, Boston, during weekday business hours. No appointment is needed. 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