Planetary Interactive G.I.S.-on-the-Web Analyzable Database (PIGWALD), an interface to support and integrate Geographic Information Systems (GIS) graphical, statistical, and spatial relational tools for analyses of planetary datasets.
Database provides information on petroleum reservoirs, type and abundance of constituents dissolved in produced water, geochemical reactions between the water and rock, hydrology and geologic, spatial distribution of petroleum production areas.
Online map system providing downloadable geospatial data, primarily NSDI framework themes (that is, general geographic data such as transportation, boundaries, hydrography, orthoimagery, land cover, and elevation).
Homepage for ISGS Spatial Data Transfer Standard (SDTS) information with links to software, FTP site, standard, and data available on line, USGS mass conversion schedule, meetings, and related web sites.
Homepage for USGS national surface-water data with more than 850,000 station years of time-series data for stream levels, streamflow (discharge), reservoir and lake levels, surface-water quality, and rainfall plus real-time data and tutorial.