Tallahassee - Leon County GIS (TLCGIS) 19990101 Leon County Karst Features Vector Digital Data Set (Polygon) Tallahassee, FL Tallahassee - Leon County GIS (TLCGIS) State of Florida http://www.tlcgis.org/ This dataset contains karst features derived from 1996 DEM. Karst is a type of topography that results from dissolution and collapse of carbonate rocks such as limestone and dolomite and characterized by closed depressions or sinkholes, caves, and underground drainage. This layer is the parent for Karst Areas of Leon County, which uses the following selection: C37_KARST.ACTIVE = 'Y'. The data was created to serve as base information for use in GIS systems for a variety of planning and analytical purposes. Most features in this layer were not field verified. With the exception of Features identified as Known and/or active, feartures were identified as potentially being karstic due to the closed depressional topography represented in the DEM. The Karst layer has been derived from the most accurate DEM data available, but in all cases where this data is used a Licensed Geologis should be acquired for verification. 19990101 publication date Complete -84.711239 -83.987056 30.683732 30.272108 ISO 19115 Topic Category Environment None The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist. Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. 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 Tallahassee - Leon County GIS (TLCGIS) unknown
301 South Monroe Street
Tallahassee FL 32301 US 805 - 4882818 webgis@mail.co.leon.fl.us FLORIDA GEOGRAPHIC DATA LIBRARY (FGDL). 431 Architecture Building, PO Box 115706, Gainesville, FL 32611-5706. http://www.fgdl.org Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 GeoPlan relied on the integrity of the attribute information within the original data. 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. 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. 0 onLine Tallahassee - Leon County GIS (TLCGIS) Create TIN for study area from 1996 Land base data. TIN should include mass polygon data, contour data, spot elevation data and breakline data. Create DEM lattice from TIN. Start with a resolution of 5 feet and interactively increase the resolution until the DEM resolution fits the terrain variance well. From DEM generate Flow direction, Sink,Sink Watershed and Sink Depth grids. Identify sink depth threshold which correctly eliminates DEM errors while preserving actual closed depressions in the landscape. Fill original DEM using this threshold. Some sink errors will remain but these will be eliminated in the remaining steps. Delete original DEM, flow direction, sink, sink watershed and sink depth models. Generate new flow direction and sink models from filled DEM. Convert new Sink grid to Polygon coverage. Establish linear relate linking Sink grid and Polygon coverage. Use point coverage of topographic sinks as a background coverage, open the contour coverage for edit. Construct a select set consisting of the highest closed contour for each depression making sure to include depressions within depressions. Create coverage from select set. Build polygon topology. Create regions to represent depressions within depressions. Create and populate attribute table. Known and active features are identified based on recommendations from licenced geologists who represent the Northwest Florida Water Management District, City of Tallahassee, and the Florida office of the United States Geological Survey. Features attributed as active are found to be consistent with the requirements and definitions put forth in the land development regulations of Leon County and the City of Tallahassee. Sources used as reference for the delineation process are 1988/1991Landbase, 1996 Land base 1996 Digital Elevation Model, and 1996 Digital Ortho Photography. TLCGIS unknown GeoPlan downloaded this dataset from the Tallahassee - Leon County GIS website (http://www.tlcgis.org/) in 2004. The data was downloaded as a shapefile and was in the following projection: State Plane Florida North (Zone 3576, FIPS 903) NAD 83 GRS 1980. The dataset was projected to FGDL Albers HPGN. - Updated area and perimeter - Projected to albers hpgn - Descript based on the ACTIVE field - Changed name to C37_KARST GeoPlan unknown Vector GT-polygon composed of chains 7923 NAD 1983 HARN Florida GDL Albers 24.0 31.5 -84.0 24.0 400000.0 0.0 coordinate pair 0.0001 0.0001 meter D North American 1983 HARN GRS 1980 6378137.0 298.257222101 C37_KARST C37_KARST Producer Defined OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. ETAT_C37_KARST_AREA Area of the polygon (sq meters). GeoPlan 0.23570000000000002 33308026.6596 PERIMETER Perimeter of the polygon (meters). GeoPlan 2.27079 98288.23403 NAME Name of the feature if available. GeoPlan ACTIVE Sites that have been examined and been determined to be active karst sites. Y = Active. U = Unconfirmed. GeoPlan ACREAGE Acreage of the site. GeoPlan 5.9999999999999995e-05 8230.2484 SOURCE Source of data. GeoPlan COMMENTS Comments on the site. GeoPlan DESCRIPT Based on ACTIVE field. GeoPlan AUTOID Undefined by Source GeoPlan 1 7923 SHAPE Feature geometry. ESRI Coordinates defining the features. SHAPE.AREA SHAPE.LEN The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist. Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. 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 Vector Digital Data Set (Polygon) 20210608 FLORIDA GEOGRAPHIC DATA LIBRARY (FGDL) unknown
PO Box 115706
Gainesville FL 32611-5706 US FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time