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Title Sum-
Institution Dataset ID
 data       graph  M    Alaska Region Digital Elevation Model (ARDEM) v2.0    ?   F   I   M   background (external link) RSS Subscribe
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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL _CoordSysBuilder String ucar.nc2.dataset.conv.CF1Convention
attribute NC_GLOBAL acknowledgement String We gratefully acknowledge the numerous organizations and individuals who have helped us assemble this expansive soundings dataset, including: National Oceanic and Atmospheric Administration (NOAA), the Canadian Hydrographic Service (CHS), NOAA's National Ocean Service (NOS) and their Hydrographic Survey Trackline Database, the National Geophysical Data Center (NGDC) and the creators of the GLOBE land elevations DEM, the Smith-Sandwell v14.1 DEM that elegantly includes ship sounding datapoints, the principal investigators on board research vessels who have made their data available to us, the Hawaii Mapping Research Group, the University of New Hampshire Center for Coastal and Ocean Mapping, the Lamont-Doherty Marine Geoscience Data System, Martin Jakobsson and the IBCAO grid, and the many individuals who have pointed us to additional data and supported our data assembly efforts. We thank the developers of the GMT toolkit for their software package that enables us to efficiently assemble this grid. Funding for this project was provided by the North Pacific Research Board (NPRB) and the Oil Spill Research Institute (OSRI).
attribute NC_GLOBAL cdm_data_type String Grid
attribute NC_GLOBAL comment String We would like to hear about uses that you apply this dataset to: this information will help us secure funding for future improvements. Valuable feedback includes both success stories and identified problems with the grid.
attribute NC_GLOBAL Conventions String CF-1.6 ACDD-1.1, COARDS, Unidata Dataset Discovery v1.0
attribute NC_GLOBAL creator_email String sldanielson at
attribute NC_GLOBAL creator_name String Seth Danielson
attribute NC_GLOBAL Easternmost_Easting double 240.0
attribute NC_GLOBAL geospatial_lat_max double 80.0
attribute NC_GLOBAL geospatial_lat_min double 45.0
attribute NC_GLOBAL geospatial_lat_resolution double 0.008333333333333333
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double 240.0
attribute NC_GLOBAL geospatial_lon_min double 130.0
attribute NC_GLOBAL geospatial_lon_resolution double 0.016666666666666666
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL GMT_version String 5.1.0 (r12452) [64-bit]
attribute NC_GLOBAL history String grdblend ARDEM.grd ibcao_subsetA.grd ibcao_subsetB.grd ibcao_subsetC.grd ibcao_subsetD.grd ibcao_subsetE.grd -Co -GARDEMblend.grd -Rg130/240/45/80 -I60s/30s
attribute NC_GLOBAL infoUrl String ???
attribute NC_GLOBAL institution String Institute of Marine Sciences, University of Alaska Fairbanks
attribute NC_GLOBAL keywords String alaska, ardem, bathymetry, below, dem, depth, depth/height, digital, Earth Science > Land Surface > Topography > Topographical Relief, Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry, Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth, elevation, fairbanks, floor, height, institute, land, level, marine, model, oceans, region, relief, sciences, sea, sea level, sea_floor_depth_below_sea_surface, seafloor, seawater, surface, topographical, topography, university, v2.0, water
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String This Digital Elevation Model (DEM) is freely available and distributable but may not be repackaged for commercial purposes. USE THIS DEM AT YOUR OWN RISK. This product is not for navigational purposes. This is a research-grade product in development and we expect that there are regions that do not well reflect actual bathymetry and topography. See the Land Elevations and Citations sections below for additional use and copyright information.
attribute NC_GLOBAL Metadata_Conventions String CF-1.6 ACDD-1.1, COARDS, Unidata Dataset Discovery v1.0
attribute NC_GLOBAL Northernmost_Northing double 80.0
attribute NC_GLOBAL source String ARDEM is based on ship sounding datapoints, including Electronic Navigation Chart (ENC) point soundings, research vessel underway soundings, multibeam swath mapping datasets and digitized point soundings from paper nautical charts.
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 45.0
attribute NC_GLOBAL standard_name_vocabulary String cf-conventions v26
attribute NC_GLOBAL summary String We have created a bathymetric digital elevation model (DEM) with nominal 1-km grid spacing over the domain 45ºN-80ºN and 130ºE-120ºW. With the exception of a portion of the outer Siberian shelves, the DEM is based solely on ship sounding datapoints, including Electronic Navigation Chart (ENC) point soundings, research vessel underway soundings, multibeam swath mapping datasets and digitized point soundings from paper nautical charts. Please note that in some regions the 1-km coverage is resolved and in many regions 1 km is not resolved. Land Elevations: In order to assist those who have interest in employing a combined bathymetric-topographic DEM, we have spliced the ocean DEM grid with land elevations from the Global Land One-kilometer Base Elevation (GLOBE) 1-km open source DEM. Because the GLOBE DEM is based on a pixel registration grid, we have employed a bilinear interpolation to re-register to gridline nodes. Please see the GLOBE web site for detailed documentation, use policies and copyright information. The GLOBE DEM use citation is listed below. Bathymetry in the Arctic: The ARDEMv2.0 grid employs depths from the International Bathymetric Chart of the Arctic Ocean (IBCAO) for the region within the polygon bounded by the following points: 130ºE/76.8ºN, 154ºE/76.8ºN, 154ºE/74ºN, 172ºE/74ºN, 172ºE/72ºN, 186ºE/72ºN, 186ºE/71.5ºN, 198ºE/71.5ºN, 198ºE/68ºN, 240ºE/68ºN, 240ºE/80ºN, 130ºE/80ºN. This region encompasses the northern Chukchi Sea, the Beaufort Sea, and the northern East Siberian Sea. See the IBCAO reference information below. Grid Details: Data is gridded to a regular 30 second latitude by 60 second longitude grid (nominally ~ 1 km), with gridline node registration. Software to to read, reproject, subsample and plot this dataset is freely available at the Generic Mapping Tools (GMT) website.
attribute NC_GLOBAL time_coverage_end String 2013-12-01T00:00:00Z
attribute NC_GLOBAL time_coverage_start String 2013-12-01T00:00:00Z
attribute NC_GLOBAL title String Alaska Region Digital Elevation Model (ARDEM) v2.0
attribute NC_GLOBAL Westernmost_Easting double 130.0
dimension time   double nValues=1, onlyValue=2013-12-01T00:00:00Z
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.385856E9, 1.385856E9
attribute time axis String T
attribute time ioos_category String Time
attribute time long_name String Time
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
dimension latitude   double nValues=4201, evenlySpaced=true, averageSpacing=0.008333333333333333
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range double 45.0, 80.0
attribute latitude axis String Y
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
dimension longitude   double nValues=6601, evenlySpaced=true, averageSpacing=0.016666666666666666
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range double 130.0, 240.0
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable z   float time, latitude, longitude
attribute z _FillValue float NaN
attribute z colorBarMaximum double 8000.0
attribute z colorBarMinimum double 0.0
attribute z colorBarPalette String OceanDepth
attribute z ioos_category String Sea Level
attribute z long_name String model Digital Elevation Model (DEM) depth/height
attribute z standard_name String sea_floor_depth_below_sea_surface
attribute z units String m

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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