karst

Coordinate system: NAD 1983 HARN StatePlane Florida North FIPS 0903 Feet

Theme keywords: geoscientificInformation, esa , geoscientificInformation

Abstract: Karst features derived from 1996 DEM.

FGDC and ESRI Metadata:

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 a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:


Citation:
Citation information:
Originators: Tallahassee - Leon County GIS


Title:
karst


Geospatial data presentation form: vector digital data


Publication information:
Publication place: Leon County, Florida

Publication information:
Publisher: Tallahassee - Leon County GIS

Online linkage: http://www.tlcgis.org


Description:
Abstract:
Karst features derived from 1996 DEM.

Purpose:
To provide members of the Tallahassee/Leon County GIS Interlocal group with base data to use in their maps, projects and business processes.

Status:
Progress: Complete
Maintenance and update frequency: Irregular

Keywords:
Theme:
Theme keywords: geoscientificInformation, esa
Theme keyword thesaurus: None

Theme:
Theme keywords: geoscientificInformation
Theme keyword thesaurus: ISO 19115 Topic Categories

Place:
Place keywords: Leon County, Tallahassee, State of Florida
Place keyword thesaurus: None

Access constraints: Public
Use constraints:
Not for use at scales greater than 1:2,400.

Point of contact:
Contact information:
Contact organization primary:
Contact person: Greg Mauldin
Contact organization: Tallahassee - Leon County GIS

Contact address:
Address type: mailing
Address:
P3 Level
Address:
301 S. Monroe St.
Address:
Leon County Courthouse
City: Tallahassee
State or province: Florida
Postal code: 32301
Country: US

Contact voice telephone: 850-606-5504


Contact electronic mail address: maulding@leoncountyfl.gov


Hours of service: 8:00 to 5:00 M-F Eastern Standard Time



Native data set environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552


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Data Quality Information:


Logical consistency report:
ESRI feature type: Simple, Geometry: Polygon, Topology:

Completeness report:
Data set has been visually inspected. All data produced strives to meet National Mapping Accuracy Standards (NMAS).

Lineage:
Source information:
Type of source media: hardDisk

Process step:
Process description:
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. Supplemental_Information Most features in this layer were not field verified. With the exception of Features identified as Known and/or active, features 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 Geologist should be acquired for verification.

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Spatial Data Organization Information:


Direct spatial Rreference method: Vector


Point and vector object information:
SDTS terms description:
SDTS point and vector object type: GT-polygon composed of chains
Point and vector object count: 0

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Spatial Reference Information:


Horizontal coordinate system definition:
Planar:
Map projection:
Map projection name: NAD 1983 HARN StatePlane Florida North FIPS 0903 Feet
Lambert conformal conic:
Standard parallel: 29.58333333333333
Standard parallel: 30.75
Longitude of central meridian: -84.5
Latitude of projection origin: 29.0
False easting: 1968500.0
False northing: 0.0

Planar coordinate information:
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.00025
Ordinate resolution: 0.00025
Planar distance units: foot_us

Geodetic model:
Horizontal datum name: D North American 1983 HARN
Ellipsoid name: GRS 1980
Semi-major axis: 6378137.0
Denominator of flattening ratio: 298.257222101

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Entity and Attribute Information:


Detailed description:
Entity type:
Entity type label: karst

Attribute:
Attribute label: OBJECTID
Attribute definition:
Internal feature number.
Attribute definition source:
Esri

Attribute domain values:
Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
Attribute label: Shape
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: AREA
Attribute definition:
Indexed-

Attribute:
Attribute label: PERIMETER
Attribute definition:
Indexed-

Attribute:
Attribute label: KARST_


Attribute:
Attribute label: KARST_ID
Attribute definition:
Indexed-

Attribute:
Attribute label: NAME
Attribute definition:
Indexed-?

Attribute:
Attribute label: ACTIVE
Attribute definition:
Indexed-?

Attribute:
Attribute label: ACREAGE
Attribute definition:
?

Attribute:
Attribute label: SOURCE
Attribute definition:
?

Attribute:
Attribute label: COMMENTS
Attribute definition:
?

Attribute:
Attribute label: SHAPE_Length
Attribute definition:
Length of feature in internal units.
Attribute definition source:
Esri

Attribute domain values:
Unrepresentable domain:
Positive real numbers that are automatically generated.


Attribute:
Attribute label: SHAPE_Area
Attribute definition:
Area of feature in internal units squared.
Attribute definition source:
Esri

Attribute domain values:
Unrepresentable domain:
Positive real numbers that are automatically generated.


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Metadata Reference Information:


Metadata date: 20160126


Metadata contact:
Contact information:
Contact organization primary:
Contact person: John Marquez
Contact organization: Tallahassee-Leon County GIS
Contact position: GIS Specialist II


Contact address:
Address type: mailing
Address:
Leon County Courthouse
Address:
301 S. Monroe Street
Address:
P3 Level
City: Tallahassee
State or province: Florida
Postal code: 32301
Country: US

Contact voice telephone: 850-606-5504
Contact facsimile telephone: 850-606-5501


Contact electronic mail address: marquezj@leoncountyfl.gov


Hours of service: 8:00 to 5:00 M-F Eastern Standard Time



Metadata standard name: FGDC Content Standard for Digital Geospatial Metadata
Metadata standard version: FGDC-STD-001-1998
Metadata time convention: local time


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