Land Boundary Information System
Mapping Data
Digital Line Graph
Original
Digital Line Graph
Original - UTM - NAD27 - Meters
You are about to enter an FTP site. The folders are organized by 250K and 100K quad sheet names and files are
identified by DEP quad numbers. Files are in *.zip format.
Enter FTP Site
About the Data
The original DLGs were created from published quad sheets as they existed in 1990.
| Projection: | | UTM Projection (Zone 16 is west of 84ยบ longitude; 17 is east) |
| Datum: | | NAD27 |
| Units: | | Meters |
| File Type: | | ASCII (Text) Format |
Some DLGs have been revised since their original creation. For more information on this topic, see the
paper explaining DLG Revisions.
These files are available in two packages:
By Individual Quad - The individual quads' .zip files are organized by 100K sheets.
By 250K Sheet - Download all 1:24,000 dlg files for a 250k quad area in one file. The 1:24,000 dlg files can be accessed individually
once the .zip file is downloaded and unzipped.
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Determining the File Name
You will need to know the 250K and 100K quad names and the DEP quad number. Use the
Quad Name Locator to find this information.
The file names are comprised of the theme abbrevation plus the DEP quad number.
THEMES:
BND = Political Boundaries
HYD = Hydrography
PIP = Pipelines
RDS = Roads
RRS = Railroads
Downloading Instructions
These files are small enough to download easily, but if you experience difficulty, using
FTP is recommended.
These files are available on CD for $25 each. (A CD holds
about one-third of the state.)
Special Software Needed
DLGs are text files and must be converted into graphic format before
being used in a GIS. There are many conversion programs available.
Usually a GIS will provide its own DLG conversion utility.
WinZip will uncompress the .zip format
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