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Dataset Title:  USGS 10-m Digital Elevation Model (DEM): Guam Subscribe RSS
Institution:  USGS   (Dataset ID: usgs_dem_10m_guam)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 latitude (degrees_north) ?      4953    9.259372E-5 (even)
  < slider >
 longitude (degrees_east) ?      6509    9.259372E-5 (even)
  < slider >
Grid Variables (which always also download all of the dimension variables)
 elev (elevation, meters) ?

File type: (more info)

(Documentation / Bypass this form) ?
(Please be patient. It may take a while to get the data.)


The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 13.210079618112808, 13.668603703141658;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 144.49493629685833, 145.09753620505055;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  elev {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 388.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Other";
    String long_name "elevation";
    String positive "up";
    String standard_name "height";
    String units "meters";
    String acknowledgement "The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST).";
    String cdm_data_type "Grid";
    String comment "These data are provided by the United States Geological Survey (USGS) and subsequently distributed via THREDDS Data Server (TDS) and other OPeNDAP servers by the Pacific Islands Ocean Observing System (PacIOOS).";
    String contributor_name "Jim Potemra";
    String contributor_role "distributor";
    String Conventions "CF-1.6, ACDD-1.3";
    String creator_email "";
    String creator_institution "United States Geological Survey (USGS)";
    String creator_name "United States Geological Survey (USGS)";
    String creator_type "institution";
    String creator_url "";
    String date_created "2015-05-11";
    String date_issued "2015-05-11";
    String date_metadata_modified "2017-01-30";
    String date_modified "2015-05-11";
    String drawLandMask "under";
    Float64 Easternmost_Easting 145.09753620505055;
    String geospatial_bounds "POLYGON ((13.210033 144.494890, 13.668650 144.494890, 13.668650 145.097583, 13.210033 145.097583, 13.210033 144.494890))";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 13.668603703141658;
    Float64 geospatial_lat_min 13.210079618112808;
    Float64 geospatial_lat_resolution 9.259371668595524e-5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 145.09753620505055;
    Float64 geospatial_lon_min 144.49493629685833;
    Float64 geospatial_lon_resolution 9.25937166859585e-5;
    String geospatial_lon_units "degrees_east";
    String history 
"PacIOOS obtained ArcInfo Binary Grids from The National Map Viewer of USGS then mosaicked and converted to NetCDF format and EPSG:4326 spatial reference system (05/2015).
2018-04-27T02:37:05Z http://localhost:8080/thredds/dodsC/usgs_dem_10m_guam
    String id "usgs_dem_10m_guam";
    String infoUrl "";
    String institution "USGS";
    String instrument "Not Applicable > Not Applicable";
    String instrument_vocabulary "GCMD Instrument Keywords";
    String ISO_Topic_Categories "elevation";
    String keywords "Earth Science > Land Surface > Topography > Terrain Elevation > Digital Elevation/Terrain Model (Dem)";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.";
    String locations "Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Guam";
    String locations_vocabulary "GCMD Location Keywords";
    String Metadata_Link "";
    String naming_authority "org.pacioos";
    Float64 Northernmost_Northing 13.668603703141658;
    String platform "Models/Analyses > > DEM > Digital Elevation Model";
    String platform_vocabulary "GCMD Platform Keywords";
    String program "Pacific Islands Ocean Observing System (PacIOOS)";
    String project "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_email "";
    String publisher_institution "University of Hawaii";
    String publisher_name "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_type "group";
    String publisher_url "";
    String references ",";
    String source "USGS 1/3 arc-second DEM quadrangles";
    String sourceUrl "http://localhost:8080/thredds/dodsC/usgs_dem_10m_guam";
    Float64 Southernmost_Northing 13.210079618112808;
    String standard_name_vocabulary "CF Standard Name Table v39";
    String summary "A 10-meter resolution land surface digital elevation model (DEM) for the island of Guam from United States Geological Survey (USGS) 1/3 arc-second DEM quadrangles.";
    String time_coverage_duration "P0D";
    String time_coverage_resolution "P0D";
    String title "USGS 10-m Digital Elevation Model (DEM): Guam";
    Float64 Westernmost_Easting 144.49493629685833;


Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its projection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

griddap request URLs must be in the form{?query}
For example,[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.

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