Digital Terrain Model (DTM) 30 arcsec CONUS [ustopo]

	Valid Date	Description	Size (bytes)
Download Compressed Shapefile	N/A	CONUS *	6,171,840

File Specifications:

Filename Prefix: ustopo.bil/.hdr/.blw/.clr
Shapefile Type: bil image
Source: derived from National Geophysical Data Center (NGDC) DTM [30 arcsec] by FSL
Last Modified: Extracted from WFO-Advanced, Jul 97 (sts)

file suffix size (bytes) type description

*.bil 26,438,400 binary *.bil image

*.hdr 73 text header file

*.blw 184 text world file (projection)

*.clr 84,455 text color look up table

file suffix	size (bytes)	type	description
*.bil	26,438,400	binary	*.bil image
*.hdr	73	text	header file
*.blw	184	text	world file (projection)
*.clr	84,455	text	color look up table

Attributes:

# records: na

Field	Type	Width,dec	Description
datum	integer	2 bytes, Motorola ordering	Elevation in meters

Comments: Digital Terrain Map (DTM) image in Geographic (lat/lon) projection.
File ustopo.bil is identical to usTopo.dat on AWIPS. See Loading Instructions.


National Weather Service Office of Science and Technology Webmaster: Ira Graffman http://www.nws.noaa.gov/geodata/catalog/topo/html/ustopo.htm Page last modified: 29 August 2002	Disclaimer	Privacy Notice