USGS 3DEP National Map Spatial Metadata 1/3 Arc-Second (10m)

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USGS/3DEP/10m_metadata
Dataset Availability
1998-08-16T00:00:00Z–2020-05-06T00:00:00
Dataset Provider
Earth Engine Snippet
FeatureCollection
ee.FeatureCollection("USGS/3DEP/10m_metadata")
FeatureView
ui.Map.FeatureViewLayer("USGS/3DEP/10m_metadata_FeatureView")
Tags
3dep usgs

Description

This is a table with metadata for the 3DEP 10m DEM asset.

The Work unit Extent Spatial Metadata (WESM) contains current lidar data availability and basic information about lidar projects, including lidar quality level, data acquisition dates, and links to project-level metadata.

See more details in this document (taken from this page).

Dataset uploaded by Farmers Business Network.

Table Schema

Table Schema

Name Type Description
abspts INT

Sample Size. Always 0

absx INT

Absolute accuracy in X

This field applies only to standard production USGS DEMs and echoes data element 2 of the source DEM's Type C record,(Digital Elevation Models, USGS, 1993). See Standards for Digital Elevation Models for more information. This field is populated with zero if not available.

For DEMs introduced after April 1, 2014 this field will be populated with -100.

absy INT

Absolute accuracy in Y

This field applies only to standard production USGS DEMs and echoes data element 2 of the source DEM's Type C record,(Digital Elevation Models, USGS, 1993). See Standards for Digital Elevation Models for more information. This field is populated with zero if not available.

For DEMs introduced after April 1, 2014 this field will be populated with -100.

absz INT

Absolute accuracy in Z

This field applies only to standard production USGS DEMs and echoes data element 2 of the source DEM's Type C record,(Digital Elevation Models, USGS, 1993). See Standards for Digital Elevation Models for more information. This field is populated with zero if not available.

For DEMs introduced after April 1, 2014 this field will be populated with -100.

demname STRING

Data Name.

The name of the original project that was adapted for incorporation into the elevation layers. The format of this field will most commonly be three parts separated by underscores: PRIMARYSTATE, BRIEF-PROJECT-DESCRIPTION, YEAR

freetext STRING

Free Text Description

For DEMs derived from standard USGS paper map series, this field is first 136 bytes of the source DEM file, including the quadrangle name, free format text, and process field. This field may contain additional information, though there are no standards for the use of the free text field.

Example: NORTH CHINOOK RESERVOIR, MT -VDYA 1-09 9/06/75 WILD A-7 60000 4 - 10915 0.0000 4845 0.00002

For DEMs introduced after April 1, 2014 this field will no longer be populated.

hdatum INT

Horizontal Datum

Valid values: * 0: Unknown * 27: North American Datum of 1927 (NAD 27) * 83: North American Datum of 1983 (NAD 83) * 72: World Geodetic System of 1972 (WGS 72) * 84: World Geodetic System of 1984 (WGS 84) * 99: Other

horizres_m DOUBLE

Horizontal Resolution of Source DEM

The horizontal resolution (x, y) of the original DEM which was used to produce elevation products, expressed in meters. Regardless of the source DEM horizontal units, this field is expressed in the common unit meters for more meaningful comparisons and simplified queries.

This is a new field in the spatial metadata shapefiles for DEMs used to produce elevation products after April 1, 2014. For DEMs used to produce elevation products prior to March 31, 2014, this field will be populated with -100.

i_date INT

Data Inspection Date

For DEMs derived from standard USGS paper map series, this field is data element 22 in the source DEMs Type A record: DEM Edit System (DES) inspection date (Digital Elevation Models, USGS, 1993). This information was not provided with some standard DEMs.

Format is either YYYY or YYMM.

For DEMs introduced after April 1, 2014 this field be populated with -100.

lrlat DOUBLE

Southern extent in latitude.

lrlon DOUBLE

Eastern extent in longitude.

meta_p_are INT

Unknown

meta_p_per INT

Unknown

pdevice STRING

Production Device

The name of the instrument used to compile the source DEM. This field is of significance primarily to DEMs produced by manual profiling (PMETHOD = 2). For DEMs introduced after April 1, 2014 this field will no longer be populated.

The current list of identified instruments is: * Wild A-7: Wild Autograph A7 - Mechanical Stereoplotter * Wild AG-1: Wild AG1 - Analytical Stereoplotter * OMI AS11A: OMI AS11A - Mechanical Stereoplotter * Wild B-8: Wild Aviograph B8 - Mechanical Stereoplotter * Wild BC-1: Wild BC1 - Analytical Stereoplotter * Wild BC-2: Wild BC2 - Analytical Stereoplotter * Zeiss C-8: Zeiss Stereoplanigraph C8 - Stereoplotter * Zeiss C100: Zeiss C100 Planicomp - Analytical Stereoplotter * GPM: Gestalt Photo Mapper II (GPM II) * KELSH: Kelsh - Optical Stereoplotter * Kern: PG-2 Kern PG-2 - Mechanical Stereoplotter * Wild: PPO-8 Wild PPO-8 Orthophoto Equipment (Used with Wild A8) * Santoni IIC: Santoni IIC - Analytical Stereoplotter * Galileo IIId: Galileo-Santoni Stereosimplex IIId * Jena Topocart B: Zeiss Jena Topocart B * Matra Traster: Matra Optique Traster - Photogrammetric Workstation * Helava US-2: Helava US-2 - Analytical Stereoplotter * CP100: Unknown, but appears to be a stereoplotter * CTOG: Contour to Grid Conversion * DCASS: Digital Cartographic Software System (USGS Software) * DLG: Digital Line Graph * LT4X: Either LT4X or LTPlus software * GDM COTS: DEM made by GeoDigital Mapping, Inc. * GTR COTS: DEM made by GTRSystems, Inc. * LT2000: Windows version of LT4X by Titan Systems, Inc. * SRTM: Shuttle Radar Topographic Mission * Unknown: Unknown * ADS40: Leica ADS40 Digital Camera

pmethod INT

Production Method

The method used to compile or capture the source DEM. For more information regarding PMETHODS see Digital Elevation Models (USGS, 1993).

Valid codes are: * 0: Unknown * 1: Electronic Image Correlation (specifically GPM II) * 2: Manual Profiling * 3: DLG2DEM * 4: DCASS * 5: LT4X * 6: Complex polynomial interpolation, such as ANUDEM * 7: Lidar * 8: Photogrammetric mass points and break lines * 9: Digital camera correlation * 10: Ifsar * 11: Other remote sensing technique * 12: Topobathymetric model * 13: Topobathymetric lidar * 14: Bathymetric lidar * 15: Geiger mode lidar * 16: Single photon lidar * 17: Flash lidar * 18: Acoustic * 19: Structure from motion

psite STRING

Production Site

The site or party who created the source DEM for DEMs used to produce elevation products prior to March 31, 2014. For DEMs introduced after April 1, 2014 this field will be populated with the value UNKNOWN.

Valid codes are: * UNKNOWN: Unknown * CONT: Contractor * MCMC: Mid-Continent Mapping Center * RMMC: Rocky Mountain Mapping Center * EMC: Eastern Mapping Center * WMC: Western Mapping Center * MAC: Mapping Applications Center * FS: Forest Service * USFS: Forest Service * BLM: Bureau of Land Management * NGTO: National Geospatial Technical Operations Center * AB: Alberta Sustainable Resource Development: Edmonton, Alberta, Canada * GDB: Center for Topographic Information, Geomatics Canada * NS: Nova Scotia Geomatics Center * NTDB: Center for TopographicInformation Geomatics Canada: Ottawa, Ontario, Canada or Landscape Analysis - Canadian Forest Service: Sault Ste. Marie, Ontario, Canada * ON: Water Resources Information Program: Ottawa, Ontario, Canada * RS: Center for Topographic Information Geomatics Canada: Ottawa, Ontario, Canada * Z: Direction generale de l'information geographique, MRNF, Quebec, Canada * YT: Yukon Environment Information Management and Technology * BC: Base Mapping and Geomatic Services: Victoria, British Columbia, Canada * MULT: Multiple Canadian government agencies

pts_id INT

Unknown

quaddate INT

Date the data were used to produce the elevation product

The date on which the source DEM was first processed into elevation products. This field is particularly useful in the identification of recently updated areas.

Format: YYYYMMDD

quadname STRING

Quadrangle Name. Additional source information. For DEMs introduced after April 1, 2014 this field will not be populated.

resolution INT

Source Resolution

This code indicates the planimetric (x, y) spacing of elevation postings within the source DEM. Note that all source data are resampled to a common resolution during production.

For DEMs used to produce elevation products prior to March 31, 2014 valid values are:

  • 0: Unknown
  • 1: 1 arc-second (Alaska, Canada, Mexico)
  • 2: 2 arc-seconds (1:100k series)
  • 3: 3 arc-seconds (1:250k series)
  • 5: 5 meters (non-standard data)
  • 10: 10 meters (7.5-minute series)
  • 30: 30 meters (7.5-minute series)
  • 13: 1/3 arc-second (non-standard data)
  • 19: 1/9 arc-second (non-standard data)

For DEMs introduced after April 1, 2014 the actual resolution of the original high-resolution source DEM will be populated in the HORIZRES_M field, and the RESOLUTION field will be populated with:

  • 100: High-resolution source
rmse INT

Availability of Relative Accuracy Statistics

This field applies only to standard production USGS DEMs and echoes data element 4 of the source DEM's Type C (relative accuracy statistics) (Digital Elevation Models, USGS, 1993).

Valid codes:

  • 1 Available
  • 0 Not available

For DEMs introduced after April 1, 2014 this field will be populated with -100.

rmsepts INT

Sample Size This field applies only to standard production USGS DEMs and echoes data element 6 of the source DEM's Type C (sample size) (Digital Elevation Models, USGS, 1993). For DEMs introduced after April 1, 2014 this field will populated with -100.

rmsex INT

Relative Accuracy X This field applies only to standard production USGS DEMs and echoes data element 5 of the source DEM's Type C (relative accuracy in X, Y, Z (Digital Elevation Models, USGS, 1993). This field is zero if not available. For DEMs introduced after April 1, 2014 this field will be populated with -100.

rmsey INT

Relative Accuracy Y This field applies only to standard production USGS DEMs and echoes data element 5 of the source DEM's Type C (relative accuracy in X, Y, Z (Digital Elevation Models, USGS, 1993). This field is zero if not available. For DEMs introduced after April 1, 2014 this field will be populated with -100.

rmsez INT

Relative Accuracy Z This field applies only to standard production USGS DEMs and echoes data element 5 of the source DEM's Type C (relative accuracy in X, Y, Z (Digital Elevation Models, USGS, 1993). This field is zero if not available. For DEMs introduced after April 1, 2014 this field will be populated with -100.

s_date INT

Data Source Date

For DEMs derived from standard USGS paper map series, this field is data element 21 in the source DEM Type A record, the date of original photography from which the DEM was compiled (Digital Elevation Models (USGS, 1993). This information was not provided with some standard DEMs with a native resolution of 30 meters.

In the case of high resolution source data, this field reflects the year that the base elevation data was collected, as in the case of LIDAR derived DEMs. For projects whose collection spanned more than one calendar year, this is the earliest acquisition year.

Format: YYYY

ullat DOUBLE

Northern extent in latitude.

ullon DOUBLE

Western extent in longitude.

utmzone INT

Source UTM or State Plane Zone The projection zone of the source DEM. If two digits, a UTM zone. If four digits, a State Plane zone. A value of zero in this field indicates that the source DEM is cast in geographic (lat/lon) coordinates. For DEMs introduced after April 1, 2014 this field will be populated with -100.

vdatum INT

Vertical Datum

This code represents the vertical datum of source DEM. Valid values are:

  • 0: Unknown
  • 1: Local Mean Sea Level
  • 2: American Samoa Vertical Datum of 2002 (ASVD02)
  • 3: Northern Marianas Vertical Datum of 2003 (NMVD03)
  • 4: Guam Vertical Datum of 2004 (GUVD04)
  • 5: Puerto Rico Vertical Datum of 2002 (PRVD02)
  • 6: Virgin Islands Vertical Datum of 2009 (VIVD09)
  • 29: National Geodetic Vertical Datum of 1929 (NGVD 29)
  • 88: North American Vertical Datum of 1988 (NAVD 88)
  • 99: Other
xshift DOUBLE

Horizontal Shift in longitude. The positional shift in longitude applied to each posting in the source DEM to convert from NAD27 coordinates to NAD83 coordinates. These values will be zero if the source DEM's HDATUM field value is 83, 84 or 72. (WGS84 is nearly identical to NAD83, and WGS72 is sufficiently similar that no shift was deemed necessary). The shift values were obtained from NGS's NADCON software, and were calculated at the nominal center of each quadrangle. New high-resolution DEMs introduced after April 1, 2014 generally have a horizontal datum of NAD83 and this field will be populated with -100.

yshift DOUBLE

Horizontal Shift in latitude. The positional shift in latitude applied to each posting in the source DEM to convert from NAD27 coordinates to NAD83 coordinates. These values will be zero if the source DEM's HDATUM field value is 83, 84 or 72. (WGS84 is nearly identical to NAD83, and WGS72 is sufficiently similar that no shift was deemed necessary). The shift values were obtained from NGS's NADCON software, and were calculated at the nominal center of each quadrangle. New high-resolution DEMs introduced after April 1, 2014 generally have a horizontal datum of NAD83 and this field will be populated with -100.

zmax DOUBLE

Maximum Elevation of Source DEM The maximum elevation value of the source DEM before any filtering or reprojection, but after conversion to meters and to NAVD88. For DEMs derived from standard USGS maps, subtracting ZSHIFT and converting to the DEM's original units results in the min and max values reported in data element 12 of the DEM's Type A record (Digital Elevation Models, USGS, 1993).

zmean DOUBLE

Mean Elevation of Elevations in Source DEM The mean elevation value of the source DEM before any filtering or reprojection, but after conversion to meters and to NAVD88.

zmin DOUBLE

Minimum Elevation of Source DEM The minimum elevation value of the source DEM before any filtering or reprojection, but after conversion to meters and to NAVD88. For DEMs derived from standard USGS maps, subtracting ZSHIFT and converting to the DEM's original units results in the min and max values reported in data element 12 of the DEM's Type A record (Digital Elevation Models, USGS, 1993).

zshift DOUBLE

Elevation Shift The elevation shift, in meters, applied to each posting within the source DEM to convert to NAVD88 values. The shift values were obtained from NGS's VERTCON software, and were calculated at the nominal center of each quadrangle. New high-resolution DEMs introduced into after April 1, 2014 all have a vertical datum of NAVD88, therefore this field will be populated with -100.

zsigma DOUBLE

Standard Deviation of Elevations in Source DEM The standard deviation of the elevations of the source DEM, before any filtering or reprojection, but after conversion to meters.

zstep DOUBLE

Elevation Resolution

For DEMs derived from standard USGS paper map series, this field, together with ZUNIT, defines vertical resolution of the source DEM. Typical values are 1 and 0.1, though others are possible.

Example: ZSTEP = 0.1 This indicates that the source DEM records elevations to the nearest tenth of a meter.

A value of 0 is used when this field does not apply, as in the case of source data with floating point precision.

New high-resolution DEMs introduced after April 1, 2014 all have floating point precision, and this field will be populated with -100.

zunit INT

Elevation Unit

This code represents the unit of elevation values in source DEM. Valid values:

  • 0: International Feet
  • 1: Meters
  • 2: U.S. Survey Feet
  • 3: Decimal degrees
  • 4: Centimeters
  • 5: Inches
  • 99: Other

Terms of Use

Terms of Use

Most U.S. Geological Survey (USGS) information resides in the public domain and may be used without restriction. Additional information on Acknowledging or Crediting USGS as Information Source is available.

Explore in Earth Engine

var fc = ee.FeatureCollection('USGS/3DEP/10m_metadata');

var empty = ee.Image().byte();
var outlines = empty.paint({
  featureCollection: fc,
  color: 'zmean',
});
var palette = ["0000ff", "00ffff", "ffff00", "ff0000", "ffffff"];
Map.addLayer(outlines, {palette: palette, max: 2000});

Visualize as a FeatureView

A FeatureView is a view-only, accelerated representation of a FeatureCollection. For more details, visit the FeatureView documentation.

var fvLayer = ui.Map.FeatureViewLayer('USGS/3DEP/10m_metadata_FeatureView');

var visParams = {
  opacity: 1,
  color: {
    property: 'zmean',
    mode: 'linear',
    palette: ['0000ff', '00ffff', 'ffff00', 'ff0000', 'ffffff'],
    min: 0,
    max: 2000
  },
  rules: [
   {
     filter: ee.Filter.eq('demname', 'pa_steasth10_8'),
     opacity: 0.1
   }
  ]
};

fvLayer.setVisParams(visParams);
fvLayer.setName('Mean elevation');

Map.setCenter(-100.612, 43.687, 8);
Map.add(fvLayer);