ChartTiff DLG's -- About DLGs

Product Description

Large-Scale (7.5-minute) DLGs correspond to the USGS 1:20,000-, 1:24,000-, and 1:25,000-scale topographic quadrangle maps.

Digital Line Graphs (DLGs) are digital vector representations of cartographic information derived from USGS maps and related sources.

Only Selective coverage of the Large-Scale (7.5-minute) DLGs are available.
The following layers (or categories of feature type) may be available:

User requiring the more complete DLG sets may want to check-out our
ChartTiff ContoursPlus.

Layer	Feature Type
Public Land Survey System (PLSS)	Township, range, and section lines
Boundaries	State, county, city, and other national and State lands such as forests and parks
Transportation	Roads and trails, railroads, pipelines and transmission lines
Hydrography	Flowing water, standing water, and wetlands
Hypsography	Contours and supplementary spot elevations
Non-vegetative features	Glacial moraine, lava, sand, and gravel
Survey control and markers	Horizontal and vertical monuments (third order or better)
Manmade features	Cultural features, such as building, not collected in other data categories
Vegetative surface cover	Woods, scrub, orchards, and vineyards

ChartTiff allows for the projection of the USGS DLG in UTM - (Universal Transverse Mercator), State Plane, or Latitude / Longitude. They can be referenced to either the North American Datum (NAD) of 1927 (NAD27) or 1983 (NAD83). or WGS72 or WGS84.

ChartTiff allows for ESRI Shape or AutoCAD DXF output file formats.

ChartTiff DLGs are NOT included in the 1 Free Download Offer.
See Samples page to download sample DLGs

DLGs Sold by Full Degrees

Includes all DLG overlays available for the degree.
As low as per overlay.
Available In:
ESRI Shape or AutoCAD DXF output file formats.
Available Projections
UTM - User Selectable Zones - NAD27 / NAD83 / WGS72 / WGS84
State Plane - User Selectable Zones - NAD27 / NAD83
Latitude / Longitude - NAD27 / NAD83 / WGS72 / WGS84
Lambert, Albers and other projections available. Request Quote.
Available by Internet Download.

ContoursPlus Individual Quads

Contours generated from the National Elevation Dataset
Click for Details
Overlays Based on Availability

1) Uses the Large 1:24,000 Scale Overlays first if available.

2) Quads generated from the Intermediate 1:100,000 Scale Overlays
are then used.

3) Some overlays regardless of scale may not be available from the
USGS. In this case some overlays may not be provided.
Available in ESRI Shapefiles and AutoCAD DXF
Includes all attributes.
Note: 24 hour turnaround for Internet downloads on Contours and Overlays
Available Projections (selected during check-out)
UTM - User Selectable Zones - NAD27 / NAD83 / WGS72 / WGS84
State Plane - User Selectable Zones - NAD27 / NAD83
Latitude / Longitude - NAD27 / NAD83 / WGS72 / WGS84
Contour Units (selected during check-out))
Select 5, 10, 20, 25, 30, 40, 50, 60, 80, 90, 100 Feet / Meters
ContoursPlus are NOT Available in 1 Free Download Offer
Available via Internet Download or USB Flash / External Drive

Order Individual ContoursPlus Quads