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Assessment Neighborhoods (AsNbhdPly)

Assessment Neighborhoods (AsNbhdPly)

by Office of Tax and Revenue on 03/15/2007

Keywords
About: Assessment Neighborhoods, Property, Land, Taxation, planningCadastre
Taking place at: Washington, D.C., District of Columbia, DC GIS, DCGIS

Abstract

This dataset contains polygons that represent the boundaries of assessment neighborhoods as defined by the DC Office of Tax and Revenue (OTR) Real Property Tax Administration (RPTA). For analysis purposes, RPTA delineates assessment neighborhoods to group properties that are affected by similar economic, political, governmental, and environmental factors.

Assessment neighborhoods are defined by the environment of a subject property that has a direct and immediate effect on its value. The assessment neighborhood is a geographic area (in which there are typically fewer than several thousand properties) defined for some useful purpose, such as to ensure for later multiple regression modeling that the properties are homogeneous and share important locational characteristics.

Assessment neighborhoods boundaries typically follow street centerlines, hydrological boundaries, and boundaries of major properties such as parks and monuments. The current feature class was created by selecting coincident features from the DC GIS snapbase. These included road centerlines, stream centerlines, water boundaries, rail lines, and DC political boundaries. After a new feature class was created, any additional lines required for polygon closure were snapped to existing features using a tolerance of .001 meters.

Purpose

This dataset is used by the DC Real Property Tax Administration (RPTA) to facilitate analysis and statistical modeling on properties that are homogeneous and share important locational characteristics.

Access constraints

Contact OCTO GIS. Any data obtained outside of OCTO GIS are unauthorized copies.

Use constraints

Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Point of contact


in DC Office of Tax and Revenue, Real Property Tax Administration



phone: 202-442-6744

Data accuracy

Logical consistency
adjusted neighborhood polygons by snapping to street centerlines and current neighborhood polygons. Polygons that were adjusted on 10/14/2005 were:
1. Small eastern portion of Nbhd 40
2. Small northern portion of Nbhd 44
3. Small western portion of Nbhd 39

Lineage / Sources

    Lineage / Processes
    Dataset copied.
    Dataset copied.

    Distribution

    Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page. Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download.

    Distribution liability
    Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

    Distributed by

    in Office of the Chief Technology Officer

    441 4th St NW, Suite 930 South
    Washington DC, 20001, USA

    fax: 202-727-5660
    hours: 8:30am - 5:30pm

    Entity

    DCGIS.AsNbhdPly

    Attributes

    • Shape / ESRI
      Feature geometry.
    • GIS_ID
      OCTO GIS sequential identifier
    • NEIGHBORHO
      Assessment Neighborhood Name
    • LabelB
      Assessment Neighborhood LABEL b
    • OBJECTID / ESRI
      Internal feature number.
    • SHAPE_LENG
    • NBHD_NUM
    • NBHD_TEXT
    • LABELB
    • SHAPE / ESRI
      Feature geometry.
    • NBHD
      Assessment Neighborhood Code
    • DESCRIPTIO
      Assessment Neighborhood Description
    • Shape_Leng / ESRI
      Length of feature in internal units squared.
    • NBHD_Num
      Assessment Neighborhood Number
    • NBHD_Text
      Assessment Neighborhood Text label
    • SHAPE.AREA
    • SHAPE.LEN

    Metadata

    FGDC Content Standards for Digital Geospatial Metadata / FGDC-STD-001-1998 as of 02/23/2008

    Provided by
    GIS Data Coordinator
    in Office of the Chief technology Officer

    441 4th St NW, Suite 930 South
    Washington DC, 20001, USA

    fax: 202-727-5660
    hours: 8:30am - 5:30pm