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How to Use the External Data Reference Pages

The External Data Reference pages are organized alphabetically by the name of the interface function. The entries in this chapter contain the following:

Purpose
Provides concise descriptions.
Syntax
Summarizes the formats of the data interface function.
Background
Provides useful background information on the data format.
Description
Gives overall information about the function and describes how each syntax behaves.
Remarks
Provides tangential information about the function.
Examples
Shows concrete illustrations of how the function can be used.
Sources
Lists the various sites where the data can be obtained.
See Also
Refers you to the reference entries of related commands.
References
Provides pointers to additional resources.

External Data Function Tables

External Data Interface

Function
Description
avhrrgoode
Read AVHRR data stored in the Goode projection.
avhrrlambert
Read AVHRR data stored in the Lambert projection.
dcwdata
Read selected data from the Digital Chart of the World.
dcwdem
Read Digital Chart of the World elevation data.
dcwgaz
Search for entries in the Digital Chart of the World gazette.
dcwread
Read a Digital Chart of the World file.
dcwrhead
Read a Digital Chart of the World file header.
dted
Read U. S. Department of Defense Digital Terrain Elevation Data (DTED) data
egm96geoid
Read 15-minute gridded geoid heights from the EGM96 geoid model.
etopo5
Read data from the ETOPO5 dataset.
fipsname
Read TIGER thinned boundary file FIPS names.
gshhs
Read Global Self-consistent Hierarchical High-resolution Shoreline data.
gtopo30
Read GTOPO30 30-arc-second (1 km) global elevation data.
readfk5
Read data from the Fifth Fundamental Catalog of Stars.
satbath
Read Global 2-minute (4 km) topography from satellite bathymetry.
tbase
Read data from the TerrainBase dataset.
tgrline
Read data from TIGER/Line files.
tigermif
Read TIGER MapInfo Interchange Format thinned boundary files.
tigerp
Read TIGER ArcInfo Format thinned boundary files.
usgs24kdem
Read USGS 1:24,000 (30 m) digital elevation maps.
usgsdem
Read USGS 1:250,000 (100 m) digital elevation maps.
usgsdems
Read USGS digital elevation map filenames.
vmap0data
Extract selected data from the Vector Map Level 0 CD-ROMs.
vmapphead
Parse the Vector Map Level 0 header string.
vmap0read
Read a Vector Map Level 0 file.
vmap0rhead
Read the Vector Map Level 0 file headers.

Chapter 4
External Data Reference




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