ARCDBA.Property_Poly

Graphical representation of property boundaries throughout Prince George's County, Maryland as established by deed, recorded plat of subdivision, and road right-of-way plats.

This layer was created and is maintained to form the basis for a number of other maps, notably zoning, land use, and development activity cases. It often takes a central role in mapping and analyses for various planning projects, and is frequently referenced by the general public via the M-NCPPC's web portal, www.PGAtlas.com. 

As part of the GEOMAP agreement in 1993 the M-NCPPC contracted with ASI to transfer the property lines from the M-NCPPC's Mylar base maps into a tiled series of Arc/INFO coverages. In subsequent years the M-NCPPC improved the accuracy and completeness of the original data in several ways. These ways include normalizing the data structure, correcting for topological errors, establishing a many-to-many relationship between the property shapes and the Maryland State Department of Assessment and Taxation tax accounts, and combining the property coverages within an ArcGIS feature dataset. Starting in 2001 and continuing to the present time, new and old property shapes and tax accounts are captured and maintained using the survey information from recorded plats, deeds, and right-of-way plats with an estimated positional accuracy of 2.0' +/-. The Property_Poly layer is maintained as part of the property dataset by the M-NCPPC GIS staff.


Constraints on accessing and using the data:

The Property_Poly layer is a graphical representation of data taken from many sources - recorded plats of subdivision, deeds, the Maryland Department of Planning's tax maps, and the Maryland State Highway Administration's road right-of-way plats. The level of accuracy accordingly varies as these sources are of varying quality and the M-NCPPC's capture techniques have changed over time. Maps of this layer therefore should not be substituted for a survey from a registered land surveyor, nor are they a legal description of property boundaries. Any measurements of position, length, area, or shape derived from this layer may only be used for general, reference, or approximate purposes, and the accuracy of such measurements should always be considered. To obtain legal descriptions and measurements, please refer to the legally recorded source document, typically a deed or subdivision plat, which may be found online at the Maryland State Archives.

While the majority of this layer serves as a cadastral map, note that ownership boundaries internal to a tax parcel (acreage) or recorded lot are not captured. Tax account information for the property shapes is maintained through a relationship class using the PROP_ID field.