Online maps are valuable tools to foster a better understanding of our environment. Digital maps help us organize spatial information in new productive ways.
Geodata map viewer uses ArcExplorer to make and print unique maps of anywhere in the US. The web site allows you to select what coverages you want to combine in your map. Coverages from satellite data, topographic relief, watershed, roads, political boundaries, etc. can be combined to make maps that tell unique stories. To make a map of a particular area curser over that area on the national map. This site offers an opportunity to see how geographical information systems can combine varied data into a single geospatial map.
The Susquehanna River Basin Commission (SRBC) maintains an online map gallery of the Susquehanna watershed and subbasins. (Lancaster Co. is in the Lower Susquehanna subbasin.) The gallery includes maps of natural features such as soils, watersheds, precipitation, physiography etc. and maps of human features such as population centers, political subdivisions, congressional districts, etc.
The PA Bureau of Topographic and Geologic Survey offers a variety of online maps and map lesson plans.
An online atlas of geologic maps of Pennsylvania offers the opportunity to learn what is the bedrock in almost any area of the state.
Karst features, such as sinkholes, are common features in the limestone and dolomite areas of Pennsylvania.
Map of the limestone and dolomite areas of Pennsylvania
Gallery of karst features maps for south central and southeast PA counties.
Map of Karst features of south central and southeast PA.
Other Pennsylvania Maps
|Water Powered Grist Mills of Lancaster County|
A summary and map of research by F&M faculty and students on how Colonial Mill Ponds in Lancaster County are effecting sediment loads in county streams, the Susquehanna River and Chesapeake Bay can be found here:
Colonial Mill Ponds of Lancaster County as a Major Source of Suspended Sediment to the Susquehanna River and Chesapeake Bay
State map of the locations and intensity of earthquakes.