Digital Land Survey Data
- Jeffersonian Public Land Survey (29 U.S. states, 1:24,000)
- Carter and Alaska Survey Systems (3 U.S. states, projected)
- East Coast Land Survey (10 U.S. states, 1:24,000)
- Original Texas Land Survey (1:24,000)
- Offshore Survey (projected)
A seamless, high-resolution base map, the TOBIN SuperBase™
National Survey File provides an invaluable foundation for applications requiring an
accurate digital land base.Encompassing over 1.4 billion acres that represent more than
65,000 townships across the nation and over 300,000 original abstracts in Texas, the
TOBIN's SuperBase™ National Survey File offers the most comprehensive,
continuous coverage available.
The National Survey File provides township/range and section polygons for 32 states as
surveyed from 1797 to the present, with districts/boroughs for 10 East Coast states and
block/section/abstract polygons for Texas. Based on the U.S.G.S. 7.5-minute topographic
quadrangles (15 minute where 7.5 minute is not available), the file is derived from a
latitude/longitude-based system of known geodetic accuracy.
The
use of recently compiled orthophotography in Texas and South Louisiana
providean even
higher level of accuracy where the survey is more complex, and where oil and gas drilling
activity is high. The geodetically-precise orthophotos were created by using the
horizontal and vertical control from the U.S.G.S. 7.5-minute topographic quadrangles. The
mapping in these areas incorporates the most current data available from public and
selected private sources. Where the most accurate and up-to-date information is needed,
the orthophoto-based data is essential.
SCALE:
1:24,000
COVERAGE:
- Jeffersonian Survey- Township, range and section data covering
Alabama, Arizona, Arkansas, California, Colorado, Florida, Idaho, Illinois, Indiana, Iowa,
Kansas, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada,
New Mexico, North Dakota, Ohio, Oklahoma, Oregon, South Dakota, Utah, Washington,
Wisconsin and Wyoming.
- Carter Survey- Five-minute-by-five-minute townships with
five-by-five sections (each section is one minute by one minute) covering Kentucky and
Tennessee. The Carter Survey was digitally projected, then matched to the state line via
digitization.
- Alaska - Similar to Carter Survey; projected townships
- East Coast - District/borough boundaries covering Connecticut,
District of Columbia, Maine, Massachusetts, New Hampshire, New Jersey, New York, Ohio
Military District, Pennsylvania, Rhode Island, Virginia, Vermont and West Virginia
- Original Texas Land Survey - Block/survey, section and
abstract data derived from General Land Office documents covering the entire State of
Texas.
- Offshore Gulf of Mexico - Area and block data for state and
federal waters digitally projected from a file created from Minerals Management Service
protraction diagrams, accurate to within one foot.
SOURCES:
- TOBIN Orthophoto Map Base - from recent aerial photography
(Texas and South Louisiana)
- U.S.G.S. - 7.5-minute topographic quadrangles (15 minute where
7.5 minute not available)
- Bureau of Land Management
- U.S. Forest Service
- State Oil and Gas Commissions
- State Land Offices
- County/Parish Offices
- Selected Private Sources
SELECTION OPTIONS:
- State
- County/Parish
- Meridian-Township-Range - Jeffersonian states
- Latitude/Longitude (XY) - for entire townships, entire blocks
in Texas
- State or Federal Waters, Area - offshore
FORMATS:
- Standard ASCII (InfoBase, TDRBM) - attributed data suitable
for use with GIS software (Note: Prices for data in other formats include additional
processing fees.)
- Custom ASCII (Landmark ZMAP, Landmark Metafile, Aangstrom,
Charisma Exchange and other common ASCII formats) - attributed data suitable for use with
GIS software, available on a request basis only
- ARC/INFO Export - (Single and Double Precision)
- AutoCAD (DWG, DXF - custom, available on a request basis only)
- Intergraph (MGE, DGN - custom, available on a request basis
only)
- MapInfo (custom, available on a request basis only)
OTHER RELATED PRODUCTS:
- Township Outlines - a file of township outlines (without
sections) annotated with the township and range designation.
- Meta Data - an ASCII U.S.G.S. quad index database covering the
entire U.S. which includes quad name, quad number, date flown and date published.
- Texas General Land Office Abstracts Index Database - an ASCII
file keyed from the Texas GLO Abstracts Index which includes abstract number, grantee
name, block name and number, section number, quartering description for abstract where
applicable, Land Office file number and class.
- Texas Abstract Locator Software - upon keying of county name
and/or number and abstract number, supplies the abstract location by TOBIN grid number,
decimal latitude/longitude and latitude/longitude in degrees minutes seconds.
Return to SuperBase™
