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Format
USGS
Digital Line Graph, Optional Format (DLG-O)
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Description: Digital vector representations of cartographic information
derived from USGS topographic maps and associated sources.
DLG's are
available in Optional format, written as ANSI-standard ASCII characters
in
fixed-block format.
Since
the USGS DLG-Optional data does not
include record delimiters, our GIS mapping
3D software Global
Mapper,
does not require that delimiters be
added, and will display DLG-O data with or
without delimiters. Other gis mapping software may
require either
the absence or presence of
delimiters.
Available
for free? No. However, some scales
have been converted to Spatial Data
Transfer Standard (SDTS). See our SDTS
page.
Web
Pages and FTP Sites:
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Check other Supported
Formats of our Gis Mapping Software
Download the Free
Version of our Gis Mapping Software
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