Assessment Subneighborhoods (AsSubNbhdPly)Assessment Subneighborhoods (AsSubNbhdPly)
by Office of Tax and Revenue on 03/15/2007
Keywords
About:
Assessment Neighborhoods, RPTA Neighborhoods, Assessment Sub Neighborhoods, Property, Taxation, Land, planningCadastre
Taking place at:
Washington, D.C., District of Columbia, DC GIS, DCGIS
Abstract
This dataset contains polygons that represent the boundaries of assessment subneighborhoods 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 subneighborhoods are defined by the environment of a subject property that has a direct and immediate effect on its value. The assessment subneighborhood 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 sub neighborhood polygons by snapping to street centerlines and current sub neighborhood polygons. Polygons that were adjusted on 10/14/2005 were:
1. Sub Nbhds in Nbhd 40 - created new sub neighborhood and adjusted other sub neighborhoods within nbhd 40
2. Adjused western portion of sub nbhd 39 L.
3. Added Sub Nbhds 49a, 49b, and 49c.
4. Added Sub Nbhds, 32a, and 32b.
4.
Lineage / Sources
Lineage / ProcessesDistribution
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.AsSubNbhdPly
Attributes
- NHBD_No
Assessment neighborhood no - Shape / ESRI
Feature geometry. - FID_1
Unique Id - ID
Unique Id - SUBNBHD
Assessment Subneighborhood Name - NHBD
Assessment Subneighborhood code - DESCRIPTIO
Assessment Subneighborhood description - SUBNBHD_NU
Assessment Subneighborhood number - OBJECTID / ESRI
Internal feature number. - NHBD_NO
- SHAPE / ESRI
Feature geometry. - SHAPE.AREA
- DISTANCE
Assessment Subneighborhood distance - NBHD_NUM
Assessment neighborhood number - SHAPE.LEN
Metadata
FGDC Content Standards for Digital Geospatial Metadata / FGDC-STD-001-1998 as of 08/13/2007
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