Property Boundaries

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Description:



These polygons represent the boundaries of the Assessor’s property parcels. Some attribute information from the Assessor’s Database is added and more information from this and other databases can be linked via each property’s Section, Block and Lot identifier (SBL).

Features and Attributes:

There are approximately 24,200 parcel polygons. They follow topology rules to ensure connectivity and prevent overlapping parcels. Additional fields were added to support the MassGIS Standard for Digital Parcels. A more detailed explanation for some of the data fields follows this chart. 

Name

Alias

Description

Data Type

Width

MAP_PAR_ID

SBL

Property ID (PIN)

Text

26

Number

Number

Address Number (numerical)

Long Integer

10

AddressNum

Address Number

Address Number or Range

Text

10

Street

Street Name

Name of street property is located on

Text

20

Owner1

Current Owner

Current Fee Owner

Text

35

Land_Use

Land Use

State Land Use code (see appendix B for list)

Text

4

Zoning

Zoning

Zoning

Text

3

***** coded values *****

SR1

Single Residence 1

SR2

Single Residence 2

SR3

Single Residence 3

MR1

Multi-Residence 1

MR2

Multi-Residence 2

MR3

Multi-Residence 3

MR4

Multi-Residence 4

BU1

Business 1

BU2

Business 2

BU4

Business 4

BU5

Business 5

LMD

Limited Manufacturing

MAN

Manufacturing

MU1

Mixed Use 1

MU2

Mixed Use 2

MU3 Mixed Use 3
MU4 Mixed Use 4

PUB

Public Use

ORD

Open Space/Recreation

Lot_Size

Lot Size

Lot Area from deed

Long Integer

10

Frontage

Frontage

Lot Frontage from deed

Short Integer

5

Sale_Date1

Last Sale Date

Most recent sale date

Date

Sale_Price1

Last Sale Price

Most recent sale price

Long Integer

10

Legal1

Last Book & Page

Deed Book Number and Page

Text

14

Total_Val

Assessed Value

Assessed Value

Long Integer

10

Year_Built

Year Built

Year primary structure was built

Short Integer

5

Neighborhd

Residential Neighborhood

Assessor's Residential Neighborhood

Text

2

Date_Added

Date Created

Date lot was created in GIS

Date

Date_Modif

Date Last Edited

Date Last Edited

Date

 

Attributes for the Massachusetts Digital Parcel Standard:

LOC_ID

Statewide Unique ID

Unique Location ID for Mass. Parcel Standard

Text

15

POLY_TYPE

Polygon Type

Type of polygon-codes per Mass. Parcel Standard

Text

15

***** coded values *****

FEE

Fee Owner Parcel

TAX

Parcel Dissolved for Billing

ROW

Right of Way

PRIV_ROW

Private Right of Way

RAIL_ROW

Railroad Right of Way

WATER

Water Body

MAP_NO

Assessor's Map Number

Map sheet on Assessor's Tax Map Atlas

Text

4

SOURCE

Source of Boundaries

Source of Boundaries

Text

15

PLAN_ID

Plan ID Number

Not used

Text

40

LAST_EDIT

Numerical Edit Date

Date last edited (in numeric format)

Long Integer

10

BND_CHK

Boundary Discrepency

Not used

Text

2

NO_MATCH

Exclusion from Parcel Match

Not used

Text

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The [MAP_PAR_ID] is the unique property identifier (PIN) in form Section-block lot (SBL.)  Note that most SBLs have a space between the block and the lot.  This space is occasionally filled by a letter extension to the block (e.g. 23023 0004 vs. 23023A0004). There are also a few blank areas from the original Assessors Maps that do not have corresponding IDs or records in the Assessor’s Database. These “dummy” parcels were given IDs with section and block designations of “99” (e.g., Parcel ID 99099 0101) so they are clearly differentiated from the other parcels. Also, some water bodies and land along the Charles River are set up as dummy parcels. Some of those water parcels were eliminated when the data was converted to geodatabase format as they were originally created to support topology needs within Arc/INFO and are no longer necessary in the current data formats. Right of way parcels are also coded in this format as they are not in the Assessor's database.   

    Address can be taken from the [Number], or [AddressNum] and [Street] fields. For more accurate geocoding, use the Addresses layer. There are two number fields in order to accommodate both address range text descriptors such as 94-96 and numerical querying and sorting.

[Loc_ID] has been added to conform to the Statewide MassGIS Digital Parcel Standard.

This is a concatenation of the X and Y State Plane Coordinates of the parcel’s centroid in the format X_Y (e.g., 736194_2958438)

 

 Last Updated:            June, 2020

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