Description: The National Elevation Dataset (NED) is the primary elevation data product produced and distributed by the USGS. The NED provides the best available public domain raster elevation data of the conterminous United States, Alaska, Hawaii, and territorial islands in a seamless format. The NED is derived from diverse source data, processed to a common coordinate system and unit of vertical measure. All NED data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). All elevation values are provided in units of meters, and are referenced to the North American Vertical Datum of 1988 (NAVD 88) over the conterminous United States. The vertical reference will vary in other areas. NED data are available nationally at resolutions of 1 arc-second (approx. 30 meters) and 1/3 arc-second (approx. 10 meters), and in limited areas at 1/9 arc-second (approx. 3 meters). At present, the bulk of Alaska is only available at a 2 arc-second (approx. 60 meters) resolution, owing to a lack of higher resolution source data, though some areas are available at resolutions of 1 and 1/3 arc-second with plans for significant upgrades of the state over the next five years. The NED is updated on a nominal two month cycle to integrate newly available, improved elevation source data.
Feature Type: None
Type: RasterLayer
Display Field: N/A
Primary Key Field: N/A
Show Map Tips: False
Searchable: False
Identifiable: False
Queryable: True
Can Copy Feature: False
Snappable: False
Snapping Enabled: False
Has Attachments: False
Feature Label: N/A
Feature Description: N/A
Feature Long Description: N/A
Feature Zoom Factor: N/A
Feature Zoom Scale: N/A
Feature Border Color: N/A
Feature Border Width: N/A
Feature Fill Color: N/A
Icon: N/A
Include in Layer List: True
Include in Legend: False
Can Toggle Labels: False
Draw Index: N/A
Legend URL: N/A
Style Name: N/A
Data Provider: Default
Time Zone ID: N/A
Fields:
Layer Hyperlinks:
N/A
Show Feature Hyperlinks: N/A
Feature Hyperlinks:
N/A
Is Dynamic: False
Dynamic Definition:
N/A
Styles:
N/A
Queries:
Theme Settings:
BASE MAP: Imagery (1, visibility: True)
BASE MAP: Elevation (3, visibility: True)
BASE MAP: USGS Topographic Maps (4, visibility: True)