GIS Data
USGS is a primary source of geographic information system (GIS) data. Our data and information is presented in spatial and geographic formats, including The National Map, Earth Explorer, GloVIS, LandsatLook, and much more. Explore GIS Data Maps.
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Geologic maps of the Apennine-Hadley region of the Moon Apollo 15 pre-mission maps Geologic maps of the Apennine-Hadley region of the Moon Apollo 15 pre-mission maps
This map shows the regional setting of the landing site for the Apollo 15 mission. The area lies approximately 650 km southeast of the center of the Imbrium basin, a large basalt-filled multi-ringed structure in the northwest quadrant of the Moon’s near side. Several arcuate structures surround the Imbrium basin (Hartmann and Kuiper, 1962). The most prominent of these forms the northwest...
Map showing locations of samples dated by radiocarbon methods in the San Francisco Bay region Map showing locations of samples dated by radiocarbon methods in the San Francisco Bay region
Radiocarbon dating is an important interdisciplinary tool for studies involving events and processes during the last 40,000 years of earth history, including studies involving marine transgressions and regressions, land subsidence, climatic changes, sedimentation rates and patterns, fault movements, and archaeology, among others. The potential value of a radiocarbon date is diminished...
Municipal and industrial wastewater loading in the San Francisco Bay, California, 1970 Municipal and industrial wastewater loading in the San Francisco Bay, California, 1970
The purpose of this release is to describe the approximate volumes and significant pollutional loading attributable to municipal and industrial wastewater discharged into the San Francisco Bay. The six receiving-water regions (fig.1) are the same as those used previously by Pearson, Storrs, and Selleck (1969) in describing results of the comprehensive wastewater-monitoring program...