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Dataset Title:  Prince William Sound, Alaska Coastal Digital Elevation Model, 7.4074074E-4° Subscribe RSS
Institution:  NOAA   (Dataset ID: noaa_ngdc_0f95_4f7b_5bda)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
Dimensions ?    Start ?    Stop ?
latitude (degrees_north) ?
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    -
< slider >
longitude (degrees_east) ?
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    -
< slider >
 
Graph Settings
Color Bar:   Continuity:   Scale: 
   Minimum:   Maximum:   N Sections: 
Draw land mask: 
Y Axis Minimum:   Maximum:   Ascending: 
 
(Please be patient. It may take a while to get the data.)
 
Optional:
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    Click on the map to specify a new center point. ?
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 59.65, 61.3499999983;
    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 211.23, 214.66999999656;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Band1 {
    Float32 _FillValue -99999.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String grid_mapping "crs";
    String ioos_category "Statistics";
    String long_name "GDAL Band Number 1";
    String positive "up";
    String units "meters";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String comment "Developed for the University of Alaska at Fairbanks (UAF), Geophysical Institute for tsunami and coastal inundation modeling efforts for the State of Alaska.";
    String Conventions "ACDD 1.3, CF-1.6, COARDS";
    String creator_email "dem.info@noaa.gov";
    String creator_institution "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce; publisher; DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce; Boulder; Colorado; publisher; DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce; originator; Citation URL; https://www.ngdc.noaa.gov/dem/squareCellGrid/download/735; Prince William Sound, AK 8/3 arc-second MHHW DEM; Download page for accessing DEM, metadata record and development report.; download";
    String creator_name "National Centers for Environmental Information";
    String creator_type "group";
    String creator_url "https://www.ngdc.noaa.gov/mgg/bathymetry/relief.html";
    String date_issued "2009-03-25";
    String date_metadata_modified "2016-07-28";
    Float64 Easternmost_Easting 214.66999999656;
    String GDAL "GDAL 1.11.4, released 2016/01/25";
    String GDAL_AREA_OR_POINT "Point";
    String geospatial_bounds_crs "World Geodetic System 1984";
    String geospatial_bounds_vertical_crs "Mean Higher High Water height";
    Float64 geospatial_lat_max 61.3499999983;
    Float64 geospatial_lat_min 59.65;
    Float64 geospatial_lat_resolution 7.407407400000004e-4;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 214.66999999656;
    Float64 geospatial_lon_min 211.23;
    Float64 geospatial_lon_resolution 7.40740740000001e-4;
    String geospatial_lon_units "degrees_east";
    String GMT_version "4.5.13 [64-bit]";
    String history 
"Tue Jul 26 17:48:35 2016: GDAL CreateCopy( /nfs/metadata_working/DEM/prince_william_sound_ak_8_3s.nc, ... )
2018-02-25T08:09:01Z https://www.ngdc.noaa.gov/thredds/dodsC/regional/prince_william_sound_83_mhhw_2009.nc
2018-02-25T08:09:01Z http://upwell.pfeg.noaa.gov/griddap/noaa_ngdc_0f95_4f7b_5bda.das";
    String id "regionalDatasetScan.prince_william_sound_83_mhhw_2009.nc";
    String infoUrl "https://www.ngdc.noaa.gov/mgg/coastal/crm.html";
    String institution "NOAA";
    String keywords "alaska, band, Band1, bathymetry, bathymetry/seafloor, center, coastal, coastal relief, data, dem, DEM > Digital Elevation Model, depth, digital, earth, Earth Science > Land Surface > Topography > Terrain Elevation, Earth Science > Land Surface > Topography > Topographical Relief Maps, Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry, Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography, Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth, Earth Science > Oceans > Coastal Processes > Coastal Elevation, elevation, gdal, geological, geophysical, gridded elevations, integrated bathymetry and topography, land, latitude, longitude, maps, model, national, ncei, nesdis, ngdc, noaa, nos, number, ocean, oceans, prince, processes, relief, science, seafloor, service, sound, states, statistics, surface, survey, terrain, topographical, topography, united, usgs, v: < 1 meter, water, william";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.; Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.; While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.";
    String naming_authority "gov.noaa.ngdc.mgg.dem";
    Int32 node_offset 1;
    Float64 Northernmost_Northing 61.3499999983;
    String product_version "First";
    String project "ICSU-WDS > International Council for Science - World Data System";
    String publisher_email "dem.info@noaa.gov";
    String publisher_name "National Centers for Environmental Information";
    String publisher_type "institution";
    String publisher_url "https://www.ngdc.noaa.gov/mgg/bathymetry/relief.html";
    String references "Digital Elevation Models of Prince William Sound, Alaska: Procedures, Data Sources, and Analysis";
    String source "NOS Hydrographic Surveys; USACE Hydrographic Surveys; Electronic Navigational Charts; NGDC Multibeam Surveys; NGDC Trackline Surveys; USGS NED topography; Shuttle Radar Topography Mission (SRTM)";
    String sourceUrl "https://www.ngdc.noaa.gov/thredds/dodsC/regional/prince_william_sound_83_mhhw_2009.nc";
    Float64 Southernmost_Northing 59.65;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) to support individual coastal States as part of the National Tsunami Hazard Mitigation Program's (NTHMP) efforts to improve community preparedness and hazard mitigation. These integrated bathymetric-topographic DEMs are used to support tsunami and coastal inundation mapping. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (United States Geological Survey (USGS)), the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency (FEMA), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to various vertical and horizontal datums depending on the specific modeling requirements of each State. For specific datum information on each DEM, refer to the appropriate DEM; documentation. Cell sizes also vary depending on the specification required by modelers in each State, but typically range from 8/15 arc-second (~16 meters) to 8 arc-seconds (~240 meters).";
    String title "Prince William Sound, Alaska Coastal Digital Elevation Model, 7.4074074E-4°";
    Float64 Westernmost_Easting 211.23;
  }
}

 

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
https://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://upwell.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(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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