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National Elevation Data Set (NED) |
The National Elevation
Dataset is a new elevation product assembled by the
U.S. Geological Survey (USGS). It was designed to
provide national elevation data in a seamless form
with a consistent datum, elevation unit, and
projection. Data corrections were made in the
assembly process to minimize artifacts, permit edge
matching, and fill sliver areas of missing data.
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Standard DEM
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NED (National
Elevation Dataset)
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Specifications
- Coverage: Entire United States
- Source Data: USGS DEM data (enhanced)
- Projection: Geographic, NAD 83,GRS 80, decimal
degrees
- Resolution: one arc-second (approximately 30
meters) for the conterminous United States, Hawaii, and Puerto Rico
and a resolution of two arc-seconds for Alaska.
- Each file is delivered in a 1x1 degree block. DDS
can provide each file as individual quads- Call for special
requests.
- Media: CD, FTP, Hard-drive
Available Formats
- USGS Standard DEM file format
- ESRI GRID
- .BIL (Intel or Motorola byte order)
- Client specified format (custom pricing). Call for
special requests.
USGS NED Fact Sheet (125 Kb)
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Entire USA Elevation Data |
DDS, Inc. offers the
National Elevation Dataset (Enhanced DEM data) for
the entire USA, including Alaska, Hawaii, and Puerto
Rico in 1x1 degree tiles (approx.4,000 files).
The following formats are available from DDS:
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| Don't see a format that you need for your software application? E-mail us at info@usgsquads.com with your file format request |
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Elevation Data Cropped to State Boundaries |
For projects that require a state-wide elevation data such as a shaded
relief map of a state, DDS has created an off-the-shelf elevation data
product, tiled and clipped to a state boundary. The
resolution of the data varies based on the size of the state. Most
states are provided at 90-meter (3 arc second) but smaller areas such as
Washington D.C. are provided at 10-meter.
Data is provided in Geographic NAD83 projection.
Format: Geotif |
Pricing: $ 50 per state
Call to order. |
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Ordering by Custom Areas |
DDS now offers through our
application, the ability to order Elevation data for only the areas you
need. |
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Price: varies. (generally about $20 per 1x1 degree tile) |
Use
to receive a quote |