This is a connection to the Pennsylvania Spatial Data Access (PASDA) Pennsylvania's official public access geospatial information clearinghouse. PASDA was developed in 1996 by the Pennsylvania State University and has served as the clearinghouse for Pennsylvania for over twenty years.

PASDA is a cooperative project of the Governor's Office of Administration, Office for Information Technology, and Penn State Institutes of Energy and the Environment of the Pennsylvania State University. Funding and support is provided by the Pennsylvania Office for Information Technology. Penn State contributions include system administration support and infrastructure from the Institute for CyberScience, and the College of Earth and Mineral Sciences.

PASDA was developed as a service to the citizens of the Commonwealth of Pennsylvania. The purpose of PASDA is to serve as the Commonwealth's comprehensive and coordinated open geospatial data portal that provides free public access to geospatial data and information by, for, and about the Commonwealth of Pennsylvania. PASDA is Pennsylvania's node on the National Spatial Data Infrastructure,Geospatial One-Stop, and is integrated with the National States Geographic Information Council GIS Inventory.

Welcome to PennDOT's open data portal. This site provides access to all published GIS spatial data that you can map, style, chart, download or share! Select the link below to explore.

This is a connection to the Allegheny County's Geographic Information Systems Group's Open Data Portal.
They are pleased to share some of our most comprehensive data sets with the public. You can solve important local issues by exploring and downloading relevant open data, analyzing and combining the datasets using maps, and discovering and building apps.

These datasets are available in a number of formats. You can choose to download them, use REST APIs, or view them directly in an interactive web map. API's provide access as REST, HTML, JSON, GeoJSON, etc.

Please contact Allegheny for any questions or suggestions on datasets at GISHelp@AlleghenyCounty.US

This is a connection to the Chester County GIS Open Data portal. Chester County incorporates the use of Geographic Information Systems (GIS) in several departments and agencies that use geographic data in their key business functions. Geographic Information Systems integrate spatial data (maps) and tabular data (databases) through computer technology.

Contact Chester County GIS
Phone: 610-344-6096
Email: gis@chesco.org