Important GIS Data Portals and Resources
- Base maps, terrestrial ecosystems, marine ecosystems, pollution and waste, andhuman influence GIS layers
- USGS National Map Viewer with data on structures, transportation, political boundaries, hydrography, land cover, elevation, and aerial photo
- USGS tutorials and GIS data for hydrologic features (rivers, stream gage), watershed and subregions, flow direction and accumulation, and estimated flowvolume and velocity.
GIS Resources for Educators
- ESRI’s ArcLessons Homepage