All Web Tools

Groundwater flow and storage in the Edwards and Trinity aquifers are largely controlled by the geologic structure and hydrostratigraphy in the region. To help local agencies and stakeholders to more effectively manage the regional water resources, a better understanding of the spatial distribution of the geologic framework and hydrostratigraphic units of the aquifers is needed.

The USGS Earth Resources Observation and Science (EROS) Center Science Processing Architecture (ESPA) On-Demand Interface is used to request processing and services for Landsat Science Products.

The United States Geological Survey (USGS) Land Cover Trends field photography collection is 33,000 ground-referenced photos at a national-scale. The photos initially served as a research tool to aid in Landsat-derived land-use/land-cover (LULC) change analyses and assessments between 1999 and 2009.

This interactive webmap plots water-quality data from domestic and public-supply wells sampled by the USGS for the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project (GAMA-PBP), and allows users to download datasets. The GAMA-PBP is a cooperative program between the California State Water Resources Control Board and the U.S. Geological Survey.

Planetary nomenclature is used to uniquely identify a feature on the surface of a planet or satellite so that the feature can be easily located, described, and discussed. See the FAQ for more information on common questions. For general inquiries regarding planetary nomenclature or the Gazetteer website, please contact Tenielle Gaither by emailing tgaither@usgs.gov.

Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) Viewer Notes The viewer uses extensive JavaScript and frames which means some browsers may not be able to support full interactive capabilities. Additionally, the viewer may be difficult for some users to interpret. These users may contact EROS Customer Services, or the maintainer of these pages for assistance.

A new "fingerprinting" tool, developed by USGS and collaborators at University of Wisconsin-Madison, can now indicate sources of mercury in the environment.

An interactive geonarrative (Esri Story Map) showing 62 field trip stops for exploring the Hayward Fault in the East San Francisco Bay Region of California.

The Health-Based Screening Levels for Evaluating Water-Quality Data searchable online database provides Health-Based Screening Levels (HBSLs) for hundreds of chemicals, including pesticides and degradates. HBSLs are non-enforceable benchmark concentrations of contaminants in water. These screening levels supplement federal drinking-water standards and guidelines.

Maximum likelihood logistic regression is used to estimate drought probabilities for selected Virginia rivers and streams 5 to 11 months in advance. Hydrologic drought streamflow probabilities for summer months are provided as functions of streamflows during the previous winter months. This application allows the display and query of these drought streamflow probabilities for Virginia streams.

Map interface to view and download LANDFIRE data sets, receive alerts and notifications.

The Landsat Analysis Ready Data (ARD) Tile Conversion Tool converts a single Landsat WRS-2 path/row or latitude/longitude coordinates into the corresponding Landsat ARD tile, displays it on the map, and lists them below the map.