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  2. United States Geological Survey - Wikipedia

    en.wikipedia.org/wiki/United_States_Geological...

    United States Geological Survey (USGS) / 38.9470; -77.3675. The United States Geological Survey ( USGS ), founded as the Geological Survey, is an agency of the United States government whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on March 3, 1879, to study the landscape of the United ...

  3. List of free geology software - Wikipedia

    en.wikipedia.org/wiki/List_of_free_geology_software

    MS Windows. Java. Free to use software to digitize geological cross-sections, and display and edit borehole logs. Geoscience ANALYST [30] Free 3D visualization and communication software for integrated, multi-disciplinary geoscience and mining data and models, which also connects to Python through geoh5py, its open-source API. Mira Geoscience Ltd.

  4. Digital geologic mapping - Wikipedia

    en.wikipedia.org/wiki/Digital_geologic_mapping

    Because gas floats above oil, the thin red contour line marks the gas/oil contact zone. Digital geologic mapping is the process by which geological features are observed, analyzed, and recorded in the field and displayed in real-time on a computer or personal digital assistant (PDA). The primary function of this emerging technology is to ...

  5. U.S. National Geodetic Survey - Wikipedia

    en.wikipedia.org/wiki/U.S._National_Geodetic_Survey

    U.S. National Geodetic Survey. The National Geodetic Survey ( NGS) is a United States federal agency based in Washington, D.C. that defines and manages a national coordinate system, providing the foundation for transportation and communication, mapping and charting, and a large number of science and engineering applications.

  6. National Elevation Dataset - Wikipedia

    en.wikipedia.org/wiki/National_Elevation_Dataset

    The National Elevation Dataset (NED) consists of high precision topography or ground surface elevation data ( digital elevation model) for the United States. It was maintained by the USGS and all the data is in the public domain. Since the 3D Elevation Program came online, the NED was subsumed [1] into The National Map as one of its layers of ...

  7. USGS DEM - Wikipedia

    en.wikipedia.org/wiki/USGS_DEM

    USGS DEM. The USGS DEM standard is a geospatial file format developed by the United States Geological Survey for storing a raster -based digital elevation model. It is an open standard, and is used throughout the world. It has been superseded by the USGS's own SDTS format but the format remains popular due to large numbers of legacy files, self ...

  8. Digital raster graphic - Wikipedia

    en.wikipedia.org/wiki/Digital_raster_graphic

    Digital raster graphic. A small portion of a USGS DRG. A digital raster graphic ( DRG) is a digital image resulting from scanning a paper USGS topographic map for use on a computer. DRGs created by USGS are typically scanned at 250 dpi and saved as a TIFF. The raster image usually includes the original border information, referred to as the ...

  9. Geographic information system - Wikipedia

    en.wikipedia.org/wiki/Geographic_Information_System

    Screenshot of a structure map generated by geological mapping software for an 8500 ft deep gas and oil reservoir in the Erath field, Vermilion Parish, Erath, Louisiana. The left-to-right gap, near the top of the contour map indicates a Fault line. This fault line is between the blue/green contour lines and the purple/red/yellow contour lines.

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