USEFUL LINKS

USGS National Geologic Map Database
USGS National Map Viewer (many available basemaps and layers, including hillshade, slope map)
FEMA National Flood Hazard Layer Viewer
USGS National Water Dashboard (real-time surface, precip, water quality, and groundwater information)
NRCS Web Soil Survey (valid for only the uppermost 5 to 6 feet below the ground surface)
USGS Real-Time Earthquake Map
USGS Unified (seismic) Hazard Tool 
National Mine Map Repository Web Map (Pilot program as of April 2025, but provides links to many mine maps)
Google Earth Pro

SAR/InSAR -- Alaska Satellite Facility links
ASF Displacement Portal
ASF Data Search Vertex
NASA OPERA Project

LiDAR/DEM -- USGS 3DEP DEM Links
USGS Lidar
USGS ArcGIS Rest Services Directory

USGS Landslides links
USGS Landslide Inventory and Susceptibility Viewer
USGS Landslide Inventory Data Landing Page (Get Data and Metadata link is broken as of 2/1/2026)

Curated Ultimate Source Guide for Local, State, and Federal GIS data sources: By Joseph Elfelt, https://mappingsupport.com 
https://mappingsupport.com/p/surf_gis/list-federal-state-county-city-GIS-servers.pdf