gov.noaa.ngdc.mgg.geophysics:G01479 eng; USA utf8 dataset Brian Meyer NOAA National Centers for Environmental Information 303-497-6125 Brian.Meyer@noaa.gov pointOfContact 2017-09-25 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) point 1633499 Mean Sea Level depth MSL depth 2012-08-10 revision https://epsg.org/crs_5715/MSL-depth.html MSL depth GML for Vertical CRS in EPGS Registry. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::5715 NGS Gravity Station Data for the U.S. 1999-01-01 publication 1999 Edition NOAA National Centers for Environmental Information publisher DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce User Services 303-497-6826 303-497-6513 325 Broadway Boulder CO 80305-3328 USA ngdc.info@noaa.gov 8am-5pm, Monday through Friday publisher DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce User Services 303-497-6826 303-497-6513 325 Broadway Boulder CO 80305-3328 USA ngdc.info@noaa.gov 8am-5pm, Monday through Friday originator The gravity station data (1,633,499 records) were gathered by various governmental organizations (and academia) using a variety of methods. This data base was received in March 1999. Principal gravity parameters include Free-air Anomalies and Simple Bouguer Anomalies (with terrain correction applied only in areas where substantial variations in local topography exist). The gravity station data has been adjusted to the International Gravity Standardization Net 1971 (IGSN 71) and the gravity anomaly computation uses the Geodetic Reference System 1967 (GRS 67) theoretical gravity formula. The data are randomly distributed within the boundaries of the U.S., Alaska and Hawaii. To provide easy access to global and regional gravity data and related models for scientific studies. completed Brian Meyer NOAA National Centers for Environmental Information 303-497-6125 Brian.Meyer@noaa.gov pointOfContact irregular EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Control Surveys EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravitational Field EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravity EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Reference Systems EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Satellite Orbits theme Global Change Master Directory (GCMD) Science Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information custodian Absolute Gravity Bouguer Gravity Free Air Anomaly Gridded Gravity Land Gravity Observed Gravity theme Uncontrolled Keywords ICSU-WDS > International Council for Science - World Data System project Global Change Master Directory (GCMD) Project Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information custodian Continent>North America>United States of America place Global Change Master Directory (GCMD) Location Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information custodian DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2020-01-09 publication 9.1 NASA Goddard Space Flight Center, Earth Science Data and Information System https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information custodian otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use Constraints: If you use this data, please cite the National Geophysical Data Center and the originator of the data. otherRestrictions Access Constraints: None grid eng; USA geoscientificInformation -179.99882 -60.18833 20.00000 79.99166 agency_code A numeric code identifying the contributing source of a dataset. Bouguer_anom_267 A Bouguer anomaly calculated using a Bouguer slab density of 2.67g/cc.Note that the gravity anomaly calculations were computed using the GRS67 model. 659.2 -371.2 milligals milligals Bouguer_anom_sd The standard deviation associated with the Bouguer Anomaly. 0.0 50.0 milligals milligals edit_code A National Geodetic Survey code used to summarize record editing actions. latitude This is the geographic latitude expressed as a decimal number. The units are degrees. The range is -90.0 to +90.0. 79.99166 20.0 degrees degrees longitude This is the geographic longitude expressed as a decimal number. The units are degrees. The range is -180.0 to +180.0, where plus designates East longitude and minus designates West longitude. -60.18833 -179.99882 degrees degrees sea_level_elev_m Height of the surface of observation above sea level, in meters (NOTE: most often from terrain surface but may be from lake surface). 9566.0 -85.3 meters meters obs_grav The observed, or measured value of gravity in mGals at an occupied gravity station. In general, observed gravity varies from 978,000 to 984,200 mgals; therefore, many data contributors subtract a large constant from 900,000 to 982,000 from this field.Note that a constant of 978,000 mgals has been removed from the obs_grav values and that they are referenced to the IGSN71 datum. 5244.92 72.0 milligals milligals secondary_dist_m The secondary_dist_ft variable converted to meters. From DMA. 1803.7 -0.1 meters meters obs_grav_sd The standard deviation associated with the observed gravity value. 200.0 0.0 milligals milligals Free_air_anom The anomalous gravity difference between an observed value and theoretical value. The gravity data has been corrected for latitude and elevation (free-air correction), but not for the density of the rock between datum and the plane of measurement (Bouguer correction).Note that the gravity anomaly calculations were computed using the GRS67 model. 631.0 -436.1 milligals milligals Free_air_anom_sd The standard deviation of the Free-air Anomaly. 50.0 0.0 milligals milligals terr_corr_total The terrain correction is an adjustment to the simple Bouguer correction that accounts for variations in terrain above and below the elevation of the gravity station at distances away from the point of measurement. Terrain below and above the level of the theoretical horizontal slab used to make the simple Bouguer correction results in a mass deficiency or excess that always yields an erroneously low gravity measurement. As a consequence, the terrain correction is always added to the simple Bouguer correction. The total terrain correction is the sum of the inner and outer zone terrain corrections described above. 184.8 0.0 milligals milligals terr_corr_sd The standard deviation associated with the terrain correction. 99.0 0.0 milligals milligals source_id A numeric code for the contributing author or organizations of the data. 95013 0 station_char_code An alphanumeric code which indicates the type of elevation used in reducing the measured gravity to anomaly values. Generally, elevation of land gravity station, if ocean measurement, then ocean depth positive downward from surface. In some situations this may represent instrument or bottom depth, ice thickness or alternative sea-level distance measurement. From DMA. proprietary_code A numeric code denoting whether a gravity data record is: 1)not proprietary data (unmonumented) code=1, or 2)not proprietary data (monumented) code=3Unique to the NGS93 data set. true Binary DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce User Services 303-497-6826 303-497-6513 325 Broadway Boulder CO 80305-3328 USA ngdc.info@noaa.gov 8am-5pm, Monday through Friday distributor Depends on the data set Ordering Instructions: Price information is available upon request. Custom Order Process: Contact Data Center 4 Days 73507455 https://www.ngdc.noaa.gov/mgg/fliers/se-0703.html https://www.ngdc.noaa.gov/mgg/gravity/ cdRom iso9660 iso9660 repository NOAA National Centers for Environmental Information NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015. 2015-04-22T00:00:00 dataset Horizontal Positional Accuracy Report Horizontal accuracy varies from source contributor to source contributor. However, horizontal positions are usually taken from topographic maps of the area being surveyed. Accuracy may range up to +/- 100 feet. Vertical Positional Accuracy Report Vertical accuracy varies from source contributor to source contributor. However, vertical positions are usually taken from topographic maps of the area being surveyed, monumented benchmark locations, or they are determined by the use of the Global Positioning System (GPS). Accuracy may range from meters to centimeters or better. Not available Not available Quantitative Attribute Accuracy Assessment Statistical analysis. Gravity data values are the result of the measurement of small variations in the gravitational field of the earth. The magnitudes and ranges of these variations are well known in the potential field discipline. meters Variable: the average acceleration on the Earth's surface is about 980 centimeters per second squared, which is equal to 980 gals, but increases by about 1/2 percent from equator to pole. All data was processed by the source before being forwarded to the National Geophysical Data Center Source Contribution: Gravity survey data Source Type: varies NGS Gravity Station Data for the U.S. publication DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce 301-713-3191 301-713-4324 Spatial Reference System Division 1315 East-West Highway N/NGS2, SSMC3, Room 8813 Silver Spring MD 20910 U.S.A. ngs.cors@noaa.gov custodian annually 2015-11-01 This metadata was automatically generated from the Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-08-08 version of the FGDC RSE to ISO 19115-2 transform. Translated from FGDC 2012-10-10T10:32:44.674-06:00 Last Metadata Review Date: 2017-09-25 This record has been automatically modified to include references to NCEI where applicable on 2015-09-01. NOAA National Centers for Environmental Information Metadata Specialist editor Brian Meyer NOAA National Centers for Environmental Information 303-497-6125 Brian.Meyer@noaa.gov pointOfContact