City of Philadelphia PACSCL Geo-History Symposium Department of Records GIS and Parcel Mapping: Georeferencing, Edgematching and Annotation December 2005

Planning Commission scans parcels IT Timeline and Historical Context Street Centerline is developed Standardization of GIS software Orthophotography and Planimetrics created Street Centerline rectified to Orthophotography Records Department digitizes Registry Maps Orthophotography Update Land Records Metabase designed DOR Scrub Editing Edgematching and DPR Pilot Edgematching and DPR Citywide annotation

City Environment  Commitment to GIS  Infrastructure  Policies  Standard Software – ESRI product line  Facilitates the Exchange of Data among City Agencies

Parcel Layer – Accuracy / Quality  Scanned  Geo-referenced  Orthophotography  Control Points  Edge-matched  Seamless Integration of Map Sheets  Expanded ability to scroll across entire City  Increases usability  Annotated  Engineering Accuracy Preserved

Typical DOR Parcel Registry Map

More than 4,800 Maps Tile Across Philadelphia 3 Parcel Registry Maps Located in Tile 14

Georeferencing 3 Individual Parcel Maps Area of Parcel Map Overlap

Georeferencing with Orthophotography 1.Curb lines are extracted from orthophotos 2.Scanned parcel maps are scaled and rotated to line up with curb lines

Another Perspective on Georeferencing

Pre Edgematching and DPR

Post Edgematching and DPR

Scanned Parcel Registry Map

Existing GIS Parcel Features

Parcel Features Viewed with Annotation

Highly Accurate Parcel Layer as Citywide Base Map Department of Records GIS Parcel Layer

Parcel Maps Leveraged by Applications  Internet Parcel Explorer  Photo Archives  Culture Browser

City of Philadelphia Department of Records Acknowledgement M&M Solutions LLC Thank You!