Land cover and land use in the St. Johns River Water Management District based on 2004 Natural color and color infrared aerial photography.
This data layer was developed to support many of the District's critical projects or programs, including Pollution Load Reduction Goal Development, Land Acquisition, Land Management, Water Supply Planning, Floodplain Management, and Surface and Ground Water Quality Monitoring. Wetlands identified in this layer should only be used for general reference, not for legal purposes or detailed analysis. Local determinations always require field inspection.
The source imagery was obtained from December 2003 to March 2004 and used to produce orthophotos with a one meter ground resolution. Imagery was acquired at 0.62 meter ground sample distance (GSD) resolution. Flight height maintained during mission was 20,000 feet AGL. The imagery was captured at 12-bit radiometric resolution and converted to 8-bit radiometric resolution during post processing. The imagery was captured with 20% sidelap between all adjacent flight lines. The SJRWMD project area was divided into 5 flight blocks due to necessary base station and flight line length requirements. The imagery was obtained and processed by all digital means beginning with data acquisition using a Leica ADS40 Digital Airborne Sensor. The orthophotos are available in GeoTIFF form. The projected coordinate system is UTM zone 17 N, NAD 83 HARN, GRS 80, Units Meters.
ground condition
The St. Johns River Water Management District prepares and uses information for its own purposes and this information may not be suitable for other purposes. This information is provided "as is". Further documentation of this data can be obtained by contacting: St. Johns River Water Management District, Division of Integrated Application Systems, Post Office Box 1429, Palatka, Florida, 32178-1429, (386) 329-4500.
P.O Box 1429
This data set was compiled with input from SJRWMD project staff.
LCCODE and LUCODE values were screened to ensure that they belonged to the set of legal FLUCCS values for this data layer, as defined in the SJRWMD 2004 Photointerpretation Key.
Primary ancillary layers 2004 DOQQs SSURGO soils County parcels SJRWMD wetlands Other ancillary layers 1999 DOQQs 1994 DOQQs 1984 digital photography Mapping procedure Copy of 1999 layer is the input District divided into 10 mapping phases Progress monitored / measured by quarterquad (SDE status layer) Photointerpreters (PIs) work on independent quarterquads that are adjacent to encourage consistency Onscreen, ArcGIS editing Geodatabase: SDE layer SDE Versions created for each of the two editors Editor versions reconciled daily against default Attribute domains for LUCODE and LCCODE Includes fields for editor and edit date; scripts populate these fields automatically Editing process: ·map topology, not geodatabase topology. A cluster tolerance of 0.05 meters to be used ·emphasis on accuracy at 1:12,000 scale, even though the data look good enough to focus on larger scale No sliver polygons shall exist No overlapping polygons No gaps No label errors shall exist. No dangles shall exist. No intersection errors shall exist.
Minimum Mapping Units (see also the PI Key for additional guidelines) 1. Upland Classes (FLUCCS Codes of 1000, 2000, 3000, 4000, 7000, 8000) - 2 acres 2. Water and Wetland Classes (FLUCCS Codes of 5000 and 6000) - 0.5 acres 3. Special Cases a. Rivers - Rivers and canals shall be delineated where they are approximately 10 meters or greater in width and can be mapped as continuous features. b. Roads and Railroads - All major transportation corridors shall be mapped. Major transportation corridors shall include all US and State Routes identified on United States Geological Survey (USGS) 7.5 minute topographic quadrangle maps and all other roadways with at least four lanes and a substantial median. c. Utility Corridors - Utility corridors shall be delineated where they are approximately 30 meters or greater in width.
This layer is based upon 2004 digital orthophoto quarterquads. Digital orthophoto quadrangles and quarter-quadrangles must meet horizontal National Map Accuracy Standards (NMAS) at 1:24,000 scale and 1:12,000 scale, respectively. The NMAS specify that 90 percent of the well-defined points tested must fall within 40 feet (1/50 inch) at 1:24,000 scale and 33.3 feet (1/30 inch) at 1:12,000 scale. To create the data, the orthorectified images were displayed on a computer screen at varying scales of about 1:12,000 or less.
The 2004 layer is based on the 2000 land use / land cover layer, with revisions made to accomodate: a) thematic changes dictated by updates to the PI Key and classification system, and b) thematic and boundary changes indicated by the 2004 DOQQs.
The following steps were conducted onsite by staff of Kyra InfoTech, Inc, to create the 2004 layer. See Statement of work and purchase order specifications (District Purchase order # PO038177) for further details. 1. For each DOQQ, the photointerpreters will create a 2004 layer by modifying a copy of the 2000 layer according to thematic and boundary changes indicated by the 2004 DOQQs. 2. All mapping shall be from screen digitizing color-infrared (CIR) 3.75' Digital Orthophoto Quarter Quadrangles (DOQQ), in ArcGIS 9, with an adjacent digital stereo capable imagery and software for inspecting the digital imagery. 3. All mapping shall be conducted while consulting the ancillary data. 4. All classification will be in keeping with specifications listed in the PI Key. If the PI Key is unclear or incorrect, or if the photointerpreters have questions regarding appropriate classification, the internal District photointerpreter will make the decision. 5. The 2004 layer will have two land use classification items: LCCODE and LUCODE. LCCODE will be used for land cover, while LUCODE will be used for land use; item values will differ only when land use and land cover for any given polygon differ. Detailed guidelines for application of this dual coding scheme are discussed in the PI Key. The contract was initiated Sept. 2004, work began November 2004, and work Sept 2006. Adapting the use of Geodatabase for update and editing of data as well as technical issues with software and hardware slowed the project down in its early phases.
All phases were QA'ed by the SJRWMD photointerpretation specialist. Comments were sent to the photointerpreter(s) who then revised the data accordingly.
Spatial data was checked for topology errors against the following rules: No gaps between polygons No overlapping polygons A cluster tolerance of 0.05 meters was used. Where substantial overlaps or gaps existed, an SJRWMD photointerpretation specialist was consulted and the errors corrected.
The Land Use/Land Cover code combinations were checked for all features against the modified FLUCCS code. Illegal code combinations were corrected.
The landuse/land cover data in quarter quad areas around the periphery of the SJRWMD boundary were checked for completeness. If changes to the LULC data for the quarter quad were a result of changes to features shared by complete, neighboring quarter quad data, the features for the quarter quad in question were clipped and deleted.
Internal feature number.
ESRI
Land cover code
SJRWMD 2004 Photointerpretation Key
Land use code
SJRWMD 2004 Photointerpretation Key
Feature geometry.
ESRI
Area in SQ meters
Perimeter of feature in meters
The coding scheme is a modified Florida Land Use/Land Cover and Forms Classification System (FLUCCS). A detailed discussion of the coding scheme can be found in the SJRWMD 2000 Photointerpretation Key. The PI Key lists each class used in the 2004 land use / land cover layer, along with a detailed description, keys to photointerpretation, a list of similar classes, special mapping conventions if they exist, a sample DOQ image, and a field picture. SJRWMD staff may access the PI Key through GISDOC (Data, Data Users Guides).
See below for a discussion of the use of LUCODE vs. LCCODE.
Following is a list of valid LCCODE and LUCODE values.
* Codes marked with an asterisk are not used for classification and are listed only for clarification.
1000* URBAN AND BUILT UP
1100 Residential, Low Density - Less than 2 dwelling units per acre
1180 Residential, Rural - Less than or equal to 0.5 dwelling units per acre (one unit on 2 or more acres)
1190 Low density under construction
1200 Residential, Med. Density - Two to five dwelling units per acre
1290 Medium density under construction
1300 Residential, High Density
1390 High density under construction
1400 Commercial and Services
1460 Oil and gas storage: except those areas associated
with industrial use or manufacturing
1480 Cemeteries
1490 Commercial and services under construction
1500* Industrial
1510 Food processing
1520 Timber processing
1523 Pulp and paper mills
1530 Mineral processing
1540 Oil and gas processing
1550 Other light industry
1560 Other heavy industrial
1561 Ship building and repair
1562 Prestressed concrete plants
1563 Metal fabrication plants
1590 Industrial under construction
1600 Extractive
1610 Strip mines
1611 Clays
1612 Peat
1613 Heavy metals
1620 Sand and gravel pits
1630 Rock quarries
1632 Limerock or dolomite
1633 Phosphates
1640 Oil and gas fields
1650 Reclaimed lands
1660 Holding ponds
1670 Abandoned mining lands
1700 Institutional
1730 Military
1750 Governmental (to be used for KSC only)
1800 Recreational
1810 Swimming beach
1820 Golf course
1830 Race tracks
1840 Marinas and fish camps
1850 Parks and zoos
1860 Community recreational facilities
1870 Stadiums: Those facilities not associated with
High Schools, Colleges, or Universities
1890 Other recreational
1900 Open Land
1920 Inactive land with street pattern but without
structures
2000* AGRICULTURE
2100* Cropland and Pastureland
2110 Improved pastures
2120 Unimproved pastures
2130 Woodland pastures
2140 Row crops
2143 Potatoes and cabbage
2150 Field crops
2160 Mixed crops
2200 Tree Crops
2210 Citrus groves
2240 Abandoned tree crops
2300* Feeding Operations
2310 Cattle feeding operations
2320 Poultry feeding operations
2400 Nurseries and Vineyards
2410 Tree nurseries
2420 Sod farms
2430 Ornamentals
2431 Shade ferns
2432 Hammock ferns
2450 Floriculture
2500 Specialty Farms
2510 Horse farms
2520 Dairies
2540 Aquaculture
2600 Other Open Lands - Rural
2610 Fallow cropland
3000* UPLAND NONFORESTED
3100 Herbaceous Upland Nonforested
3200 Shrub and Brushland
3300 Mixed Upland Nonforested
4000* UPLAND FORESTS
4100* Upland Coniferous Forests
4110 Pine flatwoods
4120 Longleaf pine - xeric oak
4130 Sand pine
4200 Upland Hardwood Forest
4210 Xeric oak
4280 Cabbage palm
4300* Upland Mixed Forest
4340 Upland mixed coniferous/hardwood
4370 Australian pine
4400 Tree Plantations
4410 Coniferous pine
4430 Forest regeneration
5000* WATER
5100 Streams and waterways
5200 Lakes
5250 Marshy Lakes
5300 Reservoirs
5400 Bays and estuaries
5430 Enclosed saltwater ponds within a salt marsh
5500 Major springs
5600 Slough waters
6000* WETLANDS
6100* Wetland Hardwood Forests
6110 Bay swamps
6120 Mangrove swamp
6170 Mixed wetland hardwoods
6180 * Cabbage palm wetland
6181 Cabbage palm hammock
6182 Cabbage palm savannah
6200 * Wetland Coniferous Forest
6210 Cypress
6220 Pond pine
6250 Hydric pine flatwoods
6300 Wetland Forested Mixed
6400* Vegetated Non-Forested Wetlands
6410 Freshwater marshes
6420 Saltwater marshes
6430 Wet prairies
6440 Emergent aquatic vegetation
6460 Mixed scrub-shrub wetland
6500 Non-vegetated Wetland
7000* BARREN LAND
7100 Beaches other than swimming beaches
7200 Sand other than beaches
7400 Disturbed land
7410 Rural land in transition without positive
indicators of intended activity
7420 Borrow areas
7430 Spoil areas
8000* TRANSPORTATION, COMMUNICATION AND UTILITIES
8100* Transportation
8110 Airports
8120 Railroads
8130 Bus and truck terminals
8140 Roads and highways
8150 Port facilities
8160 Canals and locks
8180 Auto parking facilities - when not directly
related to other land uses
8190 Transportation under construction
8200 Communications
8290 Communications under construction
8300* Utilities
8310 Electrical power facilities
8320 Electrical power transmission lines
8330 Water supply plants
8340 Sewage treatment plants
8350 Solid waste disposal
8360 Other treatment ponds
8370 Surface Water Collection Basin
8390 Utilities under construction
*** LUCODE VS. LCCODE ***
Each feature is required to have two attributes, one emphasizing land
cover (LCCODE) and the second land use (LUCODE). In most cases, these two
values are the same. They differ in a minority of cases where separate cover and
use values are required in order to adequately describe the mapping unit. The
result is a map with dual codes. The LCCODE attribute can be used (mapped,
queried, etc.) alone for a land cover emphasis; LUCODE can be used alone for a
land use emphasis; or both can be used together.
Any polygon described by the following LUCODE values must be assigned a different LCCODE value:
1180 - Rural residential (2-5 acres per dwelling unit)
1650 - Reclaimed mining lands
1670 - Abandoned mining lands
1900 - Open land (urban)
1920 - Inactive land with street pattern but no structures (urban)
2600 - Other open lands (rural)
Any polygon described by the following LCCODE values must be assigned a different LUCODE value:
8340 - Wastewater treatment
8360 - Other treatment ponds (non-sewage).
In this case, the LUCODE must be populated with the
associated land use or purpose of the ponds, e.g.
dairy (2520) or cattle feeding operation (2310).
Polygons described by the following LUCODEs may at the discretion of the photointerpreter have differing values for LUCODE and LCCODE:
1700 - Institutional
1730 - Military
1750 - Governmental (Kennedy Space Center only)
1800 - Recreational
1850 - Parks and zoos
2240 - Abandoned tree crops
2310 - Cattle feeding operations
2320 - Poultry feeding operations
2500 - Specialty farms
2510 - Horse farms
2520 - Dairies
8350 - Solid waste disposal
The SJRWMD 2004 Land Cover / Land Use Photointerpretation Key
See also: Florida Department of Transportation. 1999. Florida Land Use, Cover and Forms Classification System. Surveying and Mapping, Thematic Mapping Section, Tallahassee Florida.
Post Office Box 1429
The St. Johns River Water Management District prepares and uses information for its own purposes and this information may not be suitable for other purposes. This information is provided "as is". Further documentation of this data can be obtained by contacting: St. Johns River Water Management District, Division of Integrated Application Systems, Post Office Box 1429, Palatka, Florida, 32178-1429, (386) 329-4500.
ESRI Shapefile, Compression
There is no charge for downloading data from the DISTRICT web site at http://www.sjrwmd.com. Data can be ordered on CD-ROM as instructed on the web site.
1. Use the DISTRICT website: http://www.sjrwmd.com to download data, or 2. Call or email to organizations listed under Distributor. Spatial data are in ARC/INFO interchange formats.
P.O. Box 1429