With surprising simplicity and startling accuracy, T.M. Fowler was able to capture at the time what a camera could not. Each work serves as a snapshot of America during the turn of the twentieth century providing a unique perspective and insight into the past.
The Pennsylvania State Archives holds warrantee township maps, which show all original land purchases from the Proprietors of the Commonwealth made inside the boundaries of present-day townships. In essence, these maps serve as a summary and geographical index for the warrants, surveys and patents held by the State Archives. Information usually shown for each tract of land includes:
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.
The Geologic Atlas of the United States is a set of 227 folios published by the U.S. Geological Survey between 1894 and 1945. Each folio includes both topographic and geologic maps for each quad represented in that folio, as well as description of the basic and economic geology of the area. Individual maps may be downloaded as TIFF or JPEG files and report can be downloaded as a PDF for easy viewing.
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.
The Atlas of Historical County Boundaries is a powerful historical research and reference tool in electronic form. The Atlas presents in maps and text complete data about the creation and all subsequent changes (dated to the day) in the size, shape, and location of every county in the fifty United States and the District of Columbia.
The PA Flood Risk Tool is designed to provide floodplain managers, insurance agents, developers, real estate agents, local planners and citizens with an effective means by which to make informed decisions about the degree of flood risk for a specific area or property.