FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2006
TITLE: USGS 1:250,000 LAND USE LAND COVER - 1970's
Geodataset Name: USGSLU Geodataset Type: SHAPE Geodataset Feature: POLYGON
GENERAL DESCRIPTION:
This dataset contains the USGS LULC from the 1970's
DATA SOURCE(S): US Geological Survey SCALE OF ORIGINAL SOURCE MAPS: 1:250,000 DATE OF AUTOMATION OR SOURCE: Varies, see DATA LINEAGE SUMMARY GEODATASET EXTENT: State of Florida
FEATURE ATTRIBUTE TABLES
Datafile Name: USGSLU.DBF
ITEM NAME WIDTH TYPE PRECISION AREA 18 DECIMAL 5 PERIMETER 18 DECIMAL 5 USGSLU_ 5 DECIMAL - USGSLU_ID 5 DECIMAL - LUCODE 2 DECIMAL - DESCRIPT 100 CHARACTER 3
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
LUCODE - Land Use Code
Level 1
Level 2
1 URBAN OR BUILT-UP LAND
11 RESIDENTIAL
12 COMMERCIAL AND SERVICES
13 INDUSTRIAL
14 TRANSPORTATION, COMMUNICATIONS, AND UTILITIES
15 INDUSTRIAL AND COMMERCIAL COMPLEXES
16 MIXED URBAN OR BUILT-UP LAND
17 OTHER URBAN OR BUILT-UP LAND
2 AGRICULTURAL LAND
21 CROPLAND AND PASTURE
22 ORCHARDS, GROVES, VINEYARDS, NURSERIES, AND ORNAMENTAL
HORTICULTURAL AREAS
23 CONFINED FEEDING OPERATIONS
24 OTHER AGRICULTURAL LAND
3 RANGELAND
31 HERBACEOUS RANGELAND
32 SHRUB AND BRUSH RANGELAND
33 MIXED RANGELAND
4 FOREST LAND
41 DECIDUOUS FOREST LAND
42 EVERGREEN FOREST LAND
43 MIXED FOREST LAND
5 WATER
51 STREAMS AND CANALS
52 LAKES
53 RESERVOIRS
54 BAYS AND ESTUARIES
6 WETLAND
61 FORESTED WETLAND
62 NONFORESTED WETLAND
7 BARREN LAND
71 DRY SALT FLATS
72 BEACHES
73 SANDY AREAS OTHER THAN BEACHES
74 BARE EXPOSED ROCK
75 STRIP MINES, QUARRIES, AND GRAVEL PITS
76 TRANSITIONAL AREAS
77 MIXED BARREN LAND
8 TUNDRA
81 SHRUB AND BRUSH TUNDRA
82 HERBACEOUS TUNDRA
83 BARE GROUND
84 WET TUNDRA
85 MIXED TUNDRA
9 PERENNIAL SNOW OR ICE
91 PERENNIAL SNOWFIELDS
92 GLACIERS
DESCRIPT - Based on Level 2 LUCODE - see above
USER NOTES:
This dataset (USGSLU) is part of a larger nationwide dataset developed in the 1970's and early 1980's by the USGS using NHAP (NASA High-Altitude Photography) and USGS 1:250,000 Topographic Base Maps. This is a small scale map and should be used only for regional or statewide analysis. DO NOT use this coverage as a base map.
It is one of a few Land Use datasets available for this time period, and can be used to perform time-series land use changes by using newer Landuse datasets from Florida's Water Management Districts such as SFLU90 and SFLU95.
FGDL QUALITY ASSURANCE STATUS:
-Added DESCRIPT Item based on LUCOD
-Set to Double Precision
-Set Tolerances to FGDL Standards
-Reprojected from a Nationwide Albers to FGDL Albers
REFERENCES:
Anderson, J.R., Hardy, E.E., Roach, J.T., and Witmer, R.E., l976, A Land Use and Land Cover classification system for use with remote sensor data: U.S. Geological Survey Professional Paper 964, 28 p.
Mitchell, W.B., Guptill, S.C., Anderson, K.E., Fegeas, R.G., and Hallam, C.A., l977, GIRAS--A geographic information retrieval and analysis system for handling Land Use and Land Cover data: U.S. Geological Survey Professional Paper l059, l6 p.
DATA LINEAGE SUMMARY:
DATA CONTENT
The set of Land Use and Land Cover and associated maps consists of Land Use and Land Cover, political units, hydrologic units, census county subdivisions, Federal land ownership, and State land ownership (optional).
The Land Use and Land Cover map is compiled to portray the Level II categories of the Land Use and Land Cover classification system documented by Anderson and others (l976). The Level II categories of this Land Use and Land Cover classification system provide the user with a basic framework to which third- and fourth-level categories may be added.
The associated maps portray either natural or administrative information. They provide the user with the opportunity to utilize the Land Use and Land Cover maps and data, either individually or collectively, to produce graphic or tabular data for the areas portrayed on the associated maps. This mapping system is constructed in such a way that the Land Use and Land Cover data can be related to other resource fields such as soils, geology, hydrology, and demography.
To provide the data in digital form, the Geographic Information Retrieval and Analysis System (GIRAS) has been developed (Mitchell and others, l977). The data structure used in GIRAS to store the information is the result of a series of evolving structures and, as such, reflects the judgment by the USGS concerning the presentation and format of polygonal data. For those users better able to handle data in a grid cell form, data are also provided in a Composite Theme Grid (CTG) format.
SOURCE DATA CHARACTERISTICS
The characteristics of the digital cartographic data base for Land Use and Land Cover and associated maps reflect the parameters used in compiling the maps. The Land Use and Land Cover mapping program is designed so that standard topographic maps at a scale of l:250,000 can be used as a base for compilation and reproduction. In a few cases, USGS has prepared Land Use and Land Cover and associated maps at a scale of 1:100,000 when the 1:100,000-scale topographic map base was available.
Land Use and Land Cover maps provide data to be used either by themselves or in combination with the other data sets produced in the program. The basic sources of land use compilation data are NASA high-altitude aerial photographs, and National High-Altitude Photography (NHAP) program photographs, usually at scales smaller than l:60,000. The l:250,000-scale topographic map series is generally used as the base map for the compilation of the Land Use and Land Cover maps and the associated overlays; 1:100,000-scale topographic map bases have been used on rare occasions. Although compilation of Land Use and Land Cover data is performed on a film-positive base usually enlarged to a scale of approximately l:l25,000, the associated overlays are both compiled and digitized at a scale of l:250,000.
All features are delineated by curved or straight lines that depict the actual boundaries of the areas (polygons) being described. The minimum size of polygons depicting all Urban or Built-up Land (categories 11-17), Water (51-54), Confined Feeding Operations (23), Other Agricultural Land 24), Strip Mines, Quarries, and Gravel Pits (75) and urban Transitional areas (76), is 4 hectares (ha). All other categories of Land Use and Land Cover have a minimum polygon size of 16 ha. (Those sizes also are considered the minimum sizes to which polygons are digitized.) In the Urban or Built-up Land and Water categories, the minimum width of a feature to be shown is 200 m; (that is, if a square with sides 200 m in length is delineated, the area will be 4 ha). Although the minimum-width consideration precludes the delineation of very narrow and very long 4-ha polygons, triangles or other polygons are acceptable if the base of the triangle or minimum width of the polygon is 200 m in length and if the area of the polygon is 4 ha. Exceptions to this specification are limited access highways (14) and all double line rivers (51) on the 1:250,000-scale base which shall have a minimum width of 92 m. For categories other than Urban or Built-up Land and Water, the 16-ha minimum size for delineation requires a minimum-width polygon of 400 m. Line weight for delineating Land Use and Land Cover polygons and for neatlines is 0.l0 mm at the production scale of l:250,000.
Pensacola 1973 Tallahassee 1972-74 Valdosta 1972-74 Jacksonville 1972-73 Apalachicola 1972-73 Gainesville 1972 Daytona Beach 1972 Plant City 1972 Orlando 1972 Tampa 1972 Fort Pierce 1972 West Palm Beach 1973 Miami 1972-73 Key West 1974
MAP PROJECTION PARAMETERS
Projection ALBERS Units METERS Datum HPGN Spheroid GRS1980 1st standard parallel 24 0 0.000 2nd standard parallel 31 30 0.000 central meridian -84 0 0.000 latitude of projection's origin 24 0 0.000 false easting (meters) 400000.00000 false northing (meters) 0.00000
DATA SOURCES CONTACT(S):
Name: U.S. Geological Survey, Branch of Technical Management
Abbr.name: USGS
Address: 510 National Center
Reston, Virginia 22092
Web site: www.usgs.gov
FGDL CONTACT:
Name: FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name: FGDL
Address: Florida Geographic Data Library
431 Architecture Building
PO Box 115706
Gainesville, FL 32611-5706
Web site: http://www.fgdl.org
Contact FGDL:
Technical Support: http://www.fgdl.org/fgdlfeed.html
FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html
FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html
For FGDL Software: http://www.fgdl.org/software.html