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description:
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This layer identifies the preventative maintenance district boundaries for the Traffic Division of the City of Philadelphia Streets Department. Preventative maintenance is necessary for traffic signals and is performed while the equipment is still working, so that it does not break down unexpectedly.DATA DEVELOPMENT:Boundary Polygon Data was constructed by Streets GIS staff under the direction of the Traffic Engineering Divison and created using the most current composite layer in ArcGIS Desktop. (See update dates in summary)KEY ATTRIBUTE FIELDS:PM_DIST: Unique identifierSUB_DIST: Referenced subdistrict numberCOORDINATE SYSTEM:Lambert Conformal Conic, NAD83, PA South Stateplane coordinates, US Foot.THEMATIC MAPPING:Use the PM_DIST field for thematic mapping and labeling. |