FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2006

TITLE: USGS 1:250,000 LAND USE LAND COVER -1970's

Geodataset Name:       USGSLU_1974
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         59000
GENERAL DESCRIPTION:
This dataset contains 1970's Land Use Land Cover information for the State of Florida . In 1999 the Florida Department of Environmental Protection created this dataset by merging four USGS WMD tiles representing Land Use Land Cover from the 1970's. The Land Use Land Cover classification standards are based on the United States Geological Survey (USGS) Land Use Land Cover (LU/LC) classification format.
DATA SOURCE(S):                    United States Geological Survey and Florida Department of Environmental Protection
SCALE OF ORIGINAL SOURCE MAPS:     250,000
DATE OF AUTOMATION OF SOURCE:      1974
GEODATASET EXTENT:                 STATE OF FLORIDA

FEATURE ATTRIBUTE TABLES:

Datafile Name: USGSLU_1974.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
LEVEL1
6 Number
LEVEL2
6 Number
LU_CODE
6 Number
DESCRIPT
100 String
FGDLAQDATE
8 Date
SHAPE
4 Geometry
AUTOID
4 Integer
SHAPE.AREA
0 Double
SHAPE.LEN
0 Double

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

LEVEL1 Land Use Code, Level 1
1 = Urban or Built-up Land

2 = Agricultural Land

3 = Rangeland

4 = Forest Land

5 = Water

6 = Wetland

7 = Barren Land


LEVEL2 Land Use Code, Level 2
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

21 = Cropland and Pasture

22 = Orchards, Groves, Vineyards, Nurseries, and Ornamental Horticultural Areas

23 = Confined Feeding Operations

24 = Other Agricultural Land

31 = Herbaceous Rangeland

32 = Shrub and Brush Rangeland

33 = Mixed Rangeland

41 = Deciduous Forest Land

42 = Evergreen Forest Land

43 = Mixed Forest Land

51 = Streams and Canals

52 = Lakes

53 = Reservoirs

54 = Bays and Estuaries

61 = Forested Wetland

62 = Nonforested Wetland

71 = Dry Salt Flats

72 = Beaches

73 = Sandy Areas Other than Beaches

75 = Strip Mines, Quarries, and Gravel Pits

76 = Transitional Areas


LU_CODE Land use code, Level 2
1100 = Residential

1200 = Commercial and Services

1300 = Industrial

1400 = Transportation, Communications, and Utilities

1500 = Industrial and Commercial Complexes

1600 = Mixed Urban or Built-up Land

1700 = Other Urban or Built-up Land

2100 = Cropland and Pasture

2200 = Orchards, Groves, Vineyards, Nurseries, and Ornamential Horticultural Areas

2300 = Confined Feeding Operations

2400 = Other Agricultural Land

3100 = Herbaceous Rangeland

3200 = Shrub and Brush Rangeland

3300 = Mixed Rangeland

4100 = Deciduous Forest Land

4200 = Evergreen Forest Land

4300 = Mixed Forest Land

5100 = Streams and Canals

5200 = Lakes

5300 = Reservoirs

5400 = Bays and Estuaries

6100 = Forested Wetland

6200 = Nonforested Wetland

7100 = Dry Salt Flats

7200 = Beaches

7300 = Sandy Areas other than Beaches

7500 = Strip Mines, Quarries, and Gravel Pits

7600 = Transitional Areas


DESCRIPT FGDL added field based upon DESCRIPTIO field, Original [DESCRIPTIO] field based on Level 2 LUCODE - see above

FGDLAQDATE Date FGDL acquired the data.

SHAPE Feature geometry.

AUTOID Unique ID added by GeoPlan

SHAPE.AREA Area

SHAPE.LEN Perimeter

Breaks in the data of this dataset are inherited from its source.

This dataset predates current standard FLUCCS codes.  While many of the codes
represent similar values, be careful to check specific codes before making
time change comparisons with more current Land Use/Land Cover layers.
USER NOTES:
This data is provided 'as is'. GeoPlan relied on the integrity
of the original data layer's topology
This data is provided 'as is' by GeoPlan and is complete to our
knowledge.
GeoPlan relied on the integrity of the attribute information within
the original data.
This data was received from the Florida Department of 
Environmental Protection (FDEP) in September 2006.  
FDEP downloaded a previous version from FGDL and 
made several undocumented corrections.  
The original dataset posted by FGDL was initially produced 
by the United States Geological Survey (USGS).

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.


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

This dataset was created for use in a GIS mapping applicaiton and for researching 
changes in Florida land use since the 1970's.

This data is provided 'as is' and its horizontal positional accuracy
has not been verified by GeoPlan

This data is provided 'as is' and its vertical positional accuracy
has not been verified by GeoPlan

THE DATA INCLUDED IN FGDL ARE 'AS IS' AND SHOULD NOT BE CONSTRUED
AS LEGALLY BINDING. THE UNIVERSITY OF FLORIDA GEOPLAN CENTER SHALL
NOT BE LIABLE FOR ANY DAMAGES SUFFERED AS A RESULT OF USING,
MODIFYING, CONTRIBUTING OR DISTRIBUTING THE MATERIALS.

A note about data scale: 

Scale is an important factor in data usage.  Certain scale datasets
are not suitable for some project, analysis, or modeling purposes.
Please be sure you are using the best available data. 

1:24000 scale datasets are recommended for projects that are at the
county level.
1:24000 data should NOT be used for high accuracy base mapping such
as property parcel boundaries.
1:100000 scale datasets are recommended for projects that are at the
multi-county or regional level.
1:125000 scale datasets are recommended for projects that are at the
regional or state level or larger.

Vector datasets with no defined scale or accuracy should be
considered suspect. Make sure you are familiar with your data
before using it for projects or analysis. Every effort has been
made to supply the user with data documentation. For additional
information, see the References section and the Data Source Contact
section of this documentation. For more information regarding
scale and accuracy, see our webpage at:
http://geoplan.ufl.edu/education.html

REFERENCES:
USGS Landcover Classification System
http://landcover.usgs.gov/pdf/anderson.pdf#search=%22usgs%20land%20use%20classifications%22

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:
This dataset was first created by the USGS as part of a larger nationwide dataset 
developed in the 1970's and early 1980's.  This dataset was first created by the 
USGS by using NHAP (NASA High-Altitude Photography) and USGS 1:250,000 
Topographic Base Maps. 
Below are the Source dates for the original data.

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
Process Date: 1974

GeoPlan downloaded the Date from the USGS in 1998. GeoPlan, during the QA/QC process included the following aspects: (1) Added DESCRIPT Item based on LUCOD (2) Set to Double Precision (3) Set Tolerances to FGDL Standards (4) Reprojected from a Nationwide Albers to FGDL Albers. Process Date: 1998
The Florida Department of Environmental Protection performed the following process steps: This data was received from GeoPlan as four WMD tile shapefiles in NAD27. The tiles were SHAPEARCed and PROJECTed into HPGN (NAD83/90) using ARC/INFO 7.2.1 and the resulting regions were converted back to shapefiles in ArcView 3.2 were the four tiles were then merged into one statewide shapefile. In ArcView 3.2, the fields LEVEL1 and LU_CODE were added and the field LUCODE was changed to LEVEL2 to improve consistency with DEP Land Use layers. Process Date: 1999
GeoPlan downloaded the Date from FDEP in 2002. GeoPlan, during the QA/QC process included the following aspects: (1) Added DESCRIPT Item based on LUCODE (2) Set to Double Precision (3) Set Tolerances to FGDL Standards (4) Reprojected Albers NAD83 HARN to FGDL Albers. Process Date: 2002
FDEP downloaded the 2002 version from FGDL and made several undocumented corrections. Process Date: Unknown
GeoPlan downloaded the Date (in shapefile format) from the Florida Department of Environmental Protection ftp site in in September 2006. GeoPlan, during the QA/QC process, included the following aspects: (1) Original dataset filename: statewide_landuse_1974.shp (2) Projected data to FGDL Albers. (3) The dataset was downloaded from the Florida Department of Environmental Protection. There were 182 "slivers" which are areas with no land use information. 158 slivers lied along USGS quad boundaries and were elimnated using the ELIMINATE tool within ArcMap 9.1. The remaining 24 slivers were larger polygons and remain within the dataset. (4) Added the FGDLAQDATE field. (5) Added DESCRIPT item based on DESCRIPTIO. (6) Deleted DESCRIPTIO field. Process Date: 20060922
MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:
U.S. Geological Survey, Branch of Technical Management
USGS
510 National Center
Reston, Virginia
22092


www.usgs.gov 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