We at Allegheny County's Geographic Information Systems Group 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.
Feel free to contact us if a dataset needs to be modified or if you have any suggestions. This is an ongoing project, be sure to check back and see what's new. Let's make our great community even better, together!