This site contains over a thousand map images and direction to where others can be found. Also, the site is organized as a Checklist of Pennsylvania Maps to 1800 to provide a useful source tool. A little Pennsylvania history is woven into the descriptions and a list of cited references is included. Maps and commentary are added periodically, so check back if interested.
This project includes recommended Pennsylvania historic maps and geospatial datasets from a period of 1800 to present organized by thematic categories of geographic names, landmarks, transportation, hydrography, municipal boundaries, land ownership, elevation, land use/land cover, and remote sensing.
This map service includes a mosaic of several volumes of plat maps that were originally bound atlases. The mosaic was created using ArcGIS software from the scanned JPEG images, varying from 300-600 dpi. These images were obtained from the Historic Pittsburgh website The images were georeferenced to WGS84 Web Mercator and the borders were clipped to create a contiguous map.