| 1995 Land Use and Land Cover | |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
1995 land use/cover categorized according to the Florida Land Use and Cover Classification System (FLUCCS). The features were photointerpreted from 1:12,000 USGS color infrared (CIR) digital orthophoto quarter quadrangles.
This data layer was created to illustrate the different land uses in the Southwest Florida Water Management District as seen in 1995. This may be useful for future management applications regarding land use change detection.
Use caution when performing change detection between this data layer and the 1950 or 1990 land use and land cover data set. These data layers were generated using different source materials, with different positional accuracy, and using different mapping methodologies. Attempts to conduct change detection analysis between these two data layers will result in false changes and silver polygon features.
ground condition
These data were not collected under the supervision of a licensed Professional Surveyor and Mapper. Use of these data requires a general understanding of GIS.
2379 Broad Street (U.S. 41 South)
A visual inspection of the 1995 land use and land cover data over the DOQQs was completed. The 1990 land use and land cover data was used as reference data. Additional checks included ArcInfo's LABELERROR procedures to verify proper annotation of features. No statistical accuracy verifications have been completed. Based on past projects of a similar nature it is estimated that classification accuracies of between 80% - 90% can be expected for Level II categories between September of 1996 and of July 1998..
The final product was checked against the source material. The Mapping and GIS section of the Southwest Florida Water Management District corrected any errors found.
There are no significant omissions.
A visual inspection of the 1995 linework over the DOQQs, at a scale of 1:8,000, was used to verify the positional placement of the linework. Accuracy is estimated at +/- 33.3 feet (National Map Accuracy Standards for 1:12,000) as of September 1996 and July 1998. The goal of this project was to rectify and update the existing 1990 land use and land cover data layer using the 1995 DOQQs that meet or exceed National Map Accuracy Standards for 1:12,000. Land use and land cover boundaries are not always well defined, however, given the use of ancillary data sources (e.g. soils data or National Wetlands Inventory) to determine feature boundaries, it is expected that data acreage should be accurate.
As part of a contract with the District, EarthData photointerpreted land use and land cover features from the USGS digital orthophoto quarter quadrangles. Prior to automation, the digital orthophotos were converted from the USGS BIP format to RGB format for use in Microstation Base Imager. The 1990 land use and land cover was imported from the ArcInfo format into a Microstation compatible format. District and EarthData staff made pre- and post-interpretation helicopter overflights of selected areas. Additional locations were field verified as necessary. Land use and land cover features were delineated, on screen, using the USGS color infrared (CIR) digital orthophoto quarter quadrangles DOQQs as a backdrop. All image analysts had prior experience in wetland and/or land use mapping. The Florida Department of Transportation's Florida Land Use, Cover and Forms Classification System (FLUCCS) was used for all mapping. Uplands were mapped with a 5-acre minimum mapping unit and using FLUCCS Level II categories. In some upland areas of tree coverage, Level III was used. Wetlands were mapped using a .5 acre minimum mapping unit and using FLUCCS Level III categories. Some open water wetlands were mapped to Level II. Upland feature boundaries separated by roads were defined by the centerline of the road. Wetland feature boundaries were defined by the edge of the road. Transportation and power line corridors were mapped when they fell into natural vegetation areas and could be easily identified. In areas where adjacent quadrangles were of different over-flight dates, the more recent photo was used to the fullest extent. In Microstation, the 1995 land use and land cover features were delineated by digitizing polygons in DGN format over the DOQQs at a scale of 1:8000. The 1990 land use and land cover linework was used a reference. Linework was digitized to fit the feature boundaries as interpreted from the DOQQs. Image analyst had the original NAPP 1:40,000 CIR aerial photography to examine where feature boundaries were not easily identified from the DOQQs. The Microstation DGN files were converted into ArcInfo coverages and linework completeness checks were performed. Any additional edits were performed using ArcEdit. During this process, linework between adjacent sheets were verified for edgematching. Topology was generated using the ArcInfo BUILD command. Upon 100% completeness of files, they were converted into ArcInfo export files for delivery. Inspection of on-screen linework was performed, with source materials, by District personnel. The new 1995 linework was displayed over the DOQQs along with the 1990 linework as a reference. The data was visually inspected to note areas where the two data layers differed significantly and to identify incorrect delineations. District personnel corrected any errors that were identified.
45 West Watkins Mill Road
Character description of the Land Use/Land Cover classification code as defined in the Florida Department of Transportations (DOT) Florida Land Use and Land Cover Classification System (FLUCCS).
DOT
Character description of the FLUCCSCODE (i.e. fluccscode 2000 = Agriculture)
DOT
The date the feature was last edited or entered into the map libraries by SWFWMD staff.
User Defined
Very general classification of land use/cover as defined in the Florida DOT's FLUCCS classification system.
DOT
Land use classification more detailed than Lev 1 as defined in the Florida DOT's FLUCCS classification system.
DOT
Detailed classification of Land use/cover as defined in the Florida DOT's FLUCCS classification system.
DOT
Very specific classification of Land Use/cover as defined in the Florida DOT's FLUCCS classification system.
DOT
2379 Broad Street (U.S. 41 South)
Translation of files to formats other than those described here is the sole responsibility of individuals downloading the data.
2379 Broad Street (U.S. 41 South)