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More about the British Library digital map collection here: Probably the largest free online digital collection of historical topographic maps and images.Although the main focus for the collection is rare 18th and 19th Century North and South American maps it also includes a variety of other historical cartographic materials covering the rest of the world.Links to Pennsylvania county maps dating from the 1850s through the 1870s are included below.The maps on this page were specifically chosen because they depict a plethora of surface and subterranean features, such as businesses, churches, mineral deposits, mountains, roads, rivers, and schools.If you wish to know the date when satellites captured those aerial images that you now see in Google Maps, you will have to use Google Earth for that (for some reason, these dates aren’t displayed on the Google Maps website).Launch the Google Earth program, search for any location and zoom in as much as possible.More importantly, they also show property owners and dwellings, allowing researchers to place individuals or families in a certain spot at a specific point in time.Pennsylvania maps depicting the Commonwealth's various counties have been produced for over 300 years, with the first being Thomas Holmes' 1681 A Mapp of Ye Improved Part of Pennsylvania in America divided into Countyes Townships and Lotts.
Another great way would be to post a question Cartotalk, the cartography forum by NACIS.Please re-visit the page, as new electronic map images will be added periodically.Digital copies of all county maps may be ordered from the Archives, and incur a .00 per map charge, plus a .00 per-order set-up fee. Patrons will receive a locked PDF version of the file (no image manipulation or printing allowed) unless the use fees form has been completed, in which case either an unlocked PDF, JPEG, or TIFF file will be provided.The first official set of county maps produced for the Commonwealth are known today as the Melish-Whiteside maps.
Drawn between 18, they were based upon actual county surveys, and include information such as township lines, municipality names, geographic features, roads, distances, and surface features.Curious to know the exact date when Google cameras captured those aerial and street view photographs of your home (or any other address)?Well you can find that data easily in Google Maps and Google Earth.This funding has now finished but we plan to continue making content updates periodically.