Nassau County Geographic Information System (GIS)

-Smart Data, Smart Maps, Smart Decisions







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Interactive Maps

ArcGIS online maps

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GIS Data

Open Data Portal: View and Download GIS Data in various formats

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PDF Maps

Ready to download, print , or save maps

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911 Addressing

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HELP Videos

YouTube channel with short videos on using our mapping resources.

What is GIS?
Our Services
GIS – FAQs
Contact / Staff