Seagrass Southwest Florida 2008
Metadata also available as
Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: Photo Science, Inc.
- Publication_Date: Unknown
- Title: Seagrass Southwest Florida 2008
- Geospatial_Data_Presentation_Form: vector digital data
- Description:
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- Abstract:
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The Southwest Florida Water Management District (SWFWMD) is responsible for the protection and management of natural systems and water quality within its geographic boundaries. One component of evaluating the ecological health of coastal ecosystems is to map and monitor submerged aquatic vegetation (SAV) communities. The dataset serves as documentation of the seagrass habitat within St. Joseph Sound and Clearwater Harbor, Tampa Bay, Sarasota Bay, Lemon Bay and Charlotte Harbor as it existed from January to Febuary 2008. Seagrass data were photointerpreted from 2008 1:24,000 scale natural color aerial photography and classified using the SWFWMD modified FLUCCS classification system. Horizontal accuracy of meets NMAS for 1:12,000 scale maps. The minimum mapping unit for classification was 0.5 acres.
- Purpose:
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Creation of a 2008 seagrass map from 1:24,000 scale natural color aerial photography that is consistent with and aligned to the previous 2002, 2004 and 2006 seagrass maps. This data was produced for the SWFWMD's "2008 Seagrass Distribution from Tarpon Springs to Boca Grande" project.
- Supplemental_Information:
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Interpreted from 1:24,000 natural color aerial photography flown on the 7th,8th,9th,15th,25th,29th of January 2008 and the 2nd,3rd,4th,5th,10th of Febuary 2008.Data were compiled using ARCGIS in a heads up environment.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Multiple_Dates/Times:
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- Single_Date/Time:
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- Calendar_Date: 01/07/08
- Single_Date/Time:
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- Calendar_Date: 01/08/08
- Single_Date/Time:
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- Calendar_Date: 01/09/08
- Single_Date/Time:
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- Calendar_Date: 01/15/08
- Single_Date/Time:
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- Calendar_Date: 01/25/08
- Single_Date/Time:
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- Calendar_Date: 01/29/08
- Single_Date/Time:
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- Calendar_Date: 02/02/08
- Single_Date/Time:
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- Calendar_Date: 02/03/08
- Single_Date/Time:
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- Calendar_Date: 02/04/08
- Single_Date/Time:
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- Calendar_Date: 02/05/08
- Single_Date/Time:
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- Calendar_Date: 02/10/08
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: every two years
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -82.864927
- East_Bounding_Coordinate: -81.855880
- North_Bounding_Coordinate: 28.173600
- South_Bounding_Coordinate: 26.690256
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: none
- Theme_Keyword: 2008 seagrass
- Theme_Keyword: sav
- Theme_Keyword: benthic
- Theme_Keyword: habitat
- Theme_Keyword: submerged vegetation
- Theme_Keyword: FLUCCS
- Theme_Keyword: coastal
- Theme_Keyword: map
- Place:
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- Place_Keyword_Thesaurus: none
- Place_Keyword: Southwest Florida Water Management District
- Place_Keyword: St. Joseph's Sound and Clearwater Harbor
- Place_Keyword: Tampa Bay
- Place_Keyword: Sarasota Bay
- Place_Keyword: Lemon Bay
- Place_Keyword: Charlotte Harbor
- Access_Constraints: none
- Use_Constraints:
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The positional accuracy of this data meets USGS NMAS for 1:12000 scale maps. This data has a minimum classification accuracy of 90% for all categories. Mapping conventions applied to the delineation and classification of seagrass categories were:
1) Outer boundaries of beds are more important than internal structure (patchiness, shapes of sand patches within beds).
2) Outer boundaries of beds are more important than density categorization within beds.
3)Minimum Mapping Unit (MMU) is 0.5 acres. It is more important to include small isolated patches than similar sized patches that were a part of a large matrix. Care shold be taken in mapping small areas of seagrass when only a small amount of seagrass is present, e.g. around a spoil island.
a. When deciding whether an area with patches of seagrass was one polygon of patchy seagrass or individual seagrass polygons, apply guideline 3 with a MMU of 0.5 acres. Err on the side of lumping except in areas where small patches are the only seagrass present.
b. If an area has a few patches, all <0.25 acres, include the polygon of patchy seagrass if the total seagrass area is >0.5 acres. Err on the side of including these rather than excluding them.
- Point_of_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Richard Eastlake
- Contact_Organization: Photo Science, Inc.
- Contact_Position: Technical Manager
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 10033 Martin Luther King Street North Suite 200
- City: St. Petersburg
- State_or_Province: FL
- Postal_Code: 33716
- Country: USA
- Contact_Voice_Telephone: 727-576-9500
- Contact_Facsimile_Telephone: 727-576-9600
- Contact_Electronic_Mail_Address: reastlake@photoscience.com
- Hours_of_Service: 8.00-5.00 Monday through Friday
- Data_Set_Credit:
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Photo Science, Inc. created the data and metadata. FWRI has altered the metadata to include processing done by FWRI staff (such as projection and an attribute addition).
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000
- Cross_Reference:
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- Citation_Information:
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- Title: Seagrass 2008
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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The District performed an accuracy assessment on the data to compare in-field classification to photointerpreted map classification. Seventy-five random sample points from polygons coded as 9113 or 9116 were generated. The sites were located in the field with a Global Positioning System (GPS). A 90% accuracy rating for seagrass categories based on the 75 randomly selected seagrass sample points was required,69 of the 75 locations (92%) were correctly classified as seagrass.
- Logical_Consistency_Report:
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Comparison of the completed seagrass coverage with other data of similar accuracy was performed. The 2008 Seagrass coverage was compared to the 2006 Seagrass coverage so that the differences between the coverages could be analyzed. This was done during photointerpretation and quality assurance.
Polygon topology present. All polygons were tested for slivers. Every polygon has a label, there are no multiple labels within polygons, there are no contiguous polygons.
- Completeness_Report:
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Minimum mapping unit for seagrass polygons is 0.5 acres. The study area boundaries for the project were defined by the SFWMD. Seagrass habitat features were captured and classified according to the rules, conventions, and descriptions in the Statement of Work and the Photointerpretation Key for the "SWFWMD 2008 Seagrass Distribution from Tarpon Springs to Boca Grande" Seagrass Mapping project.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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The positional accuracy of this data meets USGS NMAS for 1:12000 scale maps. Horizontal accuracy of the data corresponds to the positional accuracy of the aerotriangulated photography that was controlled by GPS survey control points. Digital linework was reviewed over the 2008 seagrass data and positional accuracy checked by navigating to features using coordinates selected from aerotriangulated photography for comparison to linework data collected representing those features.
- Lineage:
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- Source_Information:
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- Source_Citation:
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- Citation_Information:
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- Originator: Photo Science, Inc
- Publication_Date: Unknown
- Title: 2008 Seagrass Aerial Photography
- Source_Scale_Denominator: 1:24000
- Type_of_Source_Media: Digital orthophotos
- Source_Time_Period_of_Content:
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- Time_Period_Information:
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- Multiple_Dates/Times:
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- Single_Date/Time:
-
- Calendar_Date: 01/07/08
- Single_Date/Time:
-
- Calendar_Date: 01/08/08
- Single_Date/Time:
-
- Calendar_Date: 01/09/08
- Single_Date/Time:
-
- Calendar_Date: 01/15/08
- Single_Date/Time:
-
- Calendar_Date: 01/25/08
- Single_Date/Time:
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- Calendar_Date: 01/29/08
- Single_Date/Time:
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- Calendar_Date: 02/02/08
- Single_Date/Time:
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- Calendar_Date: 02/03/08
- Single_Date/Time:
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- Calendar_Date: 02/04/08
- Single_Date/Time:
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- Calendar_Date: 02/05/08
- Single_Date/Time:
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- Calendar_Date: 02/10/08
- Source_Currentness_Reference: ground condition
- Source_Citation_Abbreviation: none
- Source_Contribution: photographic signature for interpretation of seagrass data.
- Process_Step:
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- Process_Description:
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Photointerpretation Key
The current photointerpretation key contains examples of all FLUCCS classification types delineated for the study and includes both textural descriptions of the classification types along with several aerial photo clips clearly delineated to show users the seagrass signatures on the photos.
- Process_Date: March 25, 2008
- Process_Step:
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- Process_Description:
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Photointerpretation
Photointerpretation for the project was accomplished using heads up photogrammetric techniques.
Photointerpreters utilized previously collected field data and in-process collection of field data along with other available collateral data to assist in their interpretation. Throughout the photointerpretation process, positional accuracy of seagrass boundaries was maintained according to the photographic signatures apparent on the photography.
The following coding and classification system was applied during photointerpretation:
CODE CLASS NAME
5400 Bays and Estuaries (Open Water)
5700 Marine (Gulf of Mexico)
6510 Tidal Flats
7100 Beaches (Other than swimming beaches)
9113 Seagrass - Patchy
9116 Seagrass - Continuous
9121 Attached Algae
0 Not Classified (land)
Classification Conventions
The following classification conventions were used in order to ensure consistency of delineation:
Bays and Estuaries are delineated using code of 5400. All permanently flooded, open water, non-vegetated areas within the study area to the brackish seaward limits.
Marine (Gulf of Mexico) are delineated using code of 5700. Includes only the marine open waters of the Gulf of Mexico. Marine (5700) was separated from Bays and Estuaries (5400) by dividing lines extending across the mouths of inlets that join the two classification types.
Tidal Flats areas are delineated using code of 6510. Tidal Flats are areas of sand or mud that are exposed at least once during the year or are capable of supporting seagrass populations for that segment of the water body (i.e. approximately six feet of depth).
Non-Swimming Beaches are delineated using code of 7100. Isolated strands of open (non-vegetated) sand, not typically accessible (on islands and fringes).
Continuous, dense seagrass beds are delineated using code of 9116. These areas exhibit a continuous and uniform signature. Small, (less than one-quarter acre) sandy bottom features may be interspersed within the bed, but these areas are not dominant. Areas that appear as continuous beds of seagrass communities, regardless of species composition, will be mapped.
Patchy seagrass beds are delineated using a code of 9113. This category appears as singular, isolated patches of seagrass or extensive areas of patch strands mixed with open bottom. Typically these areas appear as rounded clumps, or as elongated strands mixed with sand.
Attached Algae are delineated using code of 9121. Only pure stands of green algae, Caulerpa, are mapped. All polygons mapped as algae (9121) are field verified during the mapping process. When Caulerpa co-exists with seagrass beds, only the grass is mapped where beds of attached algae may be distinguishable from seagrass. Where feasible, they should be mapped and field verified if >10% cover.
While performing the photointerpretation for this project, the following guidelines were used:
A. The outer boundaries of beds are more important than internal structure (patchiness, shapes of sand patches within) of beds.
B. The outer boundaries of beds are more important than density categorization within beds.
C. The minimum mapping unit is .5 acres. It is more important to include small isolated patches than similar sized patches that are part of a larger seagrass complex. Care is taken in mapping small areas of seagrass when only a small amount of seagrass is present, e.g., around a spoil island. Under this guideline, small isolated (i.e. Stand alone) patches of seagrass will be mapped wherever visible on the photography. Within patchy (9113) seagrass beds each .5 acre "patch" is not mapped individually because the entire bed is the mapped object.
- Process_Date: June 2008 - March 2009
- Process_Step:
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- Process_Description:
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Quality Assurance and Quality Control
Photo Science, Inc. has established, documented, implemented and maintains a thorough quality control system.
Photo Science's Quality Control techniques are designed to ensure products/materials provided by Photo Science are subject to adequate control of quality to ensure customer satisfaction. The techniques are designed to prevent discrepancies from occurring and are enforced with positive corrective action when necessary.
Quality control reviews were ongoing throughout the project. The datasets were examined for adherence to mapping conventions, the PI Key, spatial and classification accuracy, and photointerpretation consistency.
Inspections were performed looking for smears and other indications of problems within the digital orthophoto creation process. The created tiles are reviewed again for anomalies and interactive radiometric adjustment applied where needed. The final product was GeoTIFF format digital orthos.
Control Point, Aerotriangulation and Positional Accuracy
Compliance with the accuracy standard was ensured by the collection of photo identifiable GPS ground control after the acquisition of aerial imagery. The following checks were performed. 1. The ground control and airborne GPS data stream were validated through a fully analytical bundle aerotriangulation adjustment. 2. The DMC data was checked against the project control. The technician visited and confirmed the accuracy of the points during initial processing. 3. Digital orthophotography was validated through an inspection of edge matching and visual inspection for image quality.checked and approved by a photogrammetrist prior to stereocompilation.
In-Process Photointerpretation Quality Assurance
Photo Science's Project Manager and the designated QA Photointerpreter systematically reviewed seagrass delineations and classifications interpreted from the aerial photographs.
During quality control review using ARC/GIS software, the QA Photointerpreter reviewed the seagrass delineations interpreted on the aerial photographs. The original photointerpreter completed the required revisions and resubmitted the data to the QA Photointerpreter. The work was checked again by the quality assurance photointerpreter prior to delivery.
Comparison of the completed seagrass coverage with other data of similar accuracy was performed. The 2008 Seagrass geodatabase was compared to the 2002, 2004 and 2006 Seagrass coverages so that the differences between the coverages could be analyzed. This was done during photointerpretation and quality assurance.
The quality of the ArcGIS digital data was monitored by a combination of manual and automated analyses. A set of automated quality control programs were used to check for errors, such as missing polygon label points, label points with no attributes, invalid attribute codes, missing attributes within the info tables, and two adjacent polygons with the same attributes.
- Process_Date: March 2009
- Process_Step:
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- Process_Description:
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Final Geodatabase
At the conclusion of the photointerpretation processes for building topology and validating the dataset were completed.
Unique identifiers (record numbers) for resulting polygons were assigned automatically by the system according to normal ARC/GIS conventions.
- Process_Date: March 2009
- Process_Step:
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- Process_Description:
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FWRI received the data from SWFWMD. FWRI added the DESCRIPT field to translate the FLUCCS codes. The data were projected to Albers and loaded to ArcSDE.
- Process_Date: 200910
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Vector
- Point_and_Vector_Object_Information:
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: coordinate pair
- Coordinate_Representation:
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- Abscissa_Resolution: 0.000179
- Ordinate_Resolution: 0.000179
- Planar_Distance_Units: meters
- Geodetic_Model:
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- Horizontal_Datum_Name: North American Datum of 1983
- Ellipsoid_Name: Geodetic Reference System 80
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257222
- Vertical_Coordinate_System_Definition:
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- Altitude_System_Definition:
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- Altitude_Resolution: 1.000000
- Altitude_Encoding_Method:
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Explicit elevation coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
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- Detailed_Description:
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- Entity_Type:
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- Entity_Type_Label: GIS_Archive.FWC.seagrass_swfwmd_2008_poly_H
- Attribute:
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- Attribute_Label: OBJECTID_1
- Attribute_Definition: Internal feature number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain:
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Sequential unique whole numbers that are automatically generated.
- Attribute:
-
- Attribute_Label: OBJECTID
- Attribute_Definition: Internal feature number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain:
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Sequential unique whole numbers that are automatically generated.
- Attribute:
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- Attribute_Label: DATESTAMP
- Attribute_Definition: Final delivery date
- Attribute_Definition_Source: Photo Science
- Attribute:
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- Attribute_Label: Shape
- Attribute_Definition: Feature geometry.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain: Coordinates defining the features.
- Attribute:
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- Attribute_Label: FLUCCS_COD
- Attribute:
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- Attribute_Label: SHAPE_Leng
- Attribute:
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- Attribute_Label: DESCRIPT
- Attribute:
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- Attribute_Label: Acres
- Attribute_Definition: Area of the polygon expressed in Acres
- Attribute_Definition_Source: Photo Science
- Attribute:
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- Attribute_Label: SHAPE.area
- Attribute:
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- Attribute_Label: SHAPE.len
- Overview_Description:
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- Entity_and_Attribute_Overview:
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The FLUCCS uses numeric codes to represent the land use or land cover types within the classification system pertaining to wetlands, uplands, and anthropogenic features. The FLUCCS code is defined in the attribute field of the PAT.
- Entity_and_Attribute_Detail_Citation:
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User should refer to the Florida Department of Transportation FLUCCS and the SWFWMD Photointerpretation Classification Key for full definition of the class codes and their application.
- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Kris Kaufman
- Contact_Organization: Southwest Florida Water Management District
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 7601 US Highway 301 N,
- City: Tampa
- State_or_Province: FL
- Postal_Code: 33637
- Country: USA
- Contact_Voice_Telephone: (813) 985-7481x2208
- Contact_Electronic_Mail_Address: Kristen.Kaufman@SWFWMD.STATE.FL.US
- Resource_Description: Downloadable Data
- Standard_Order_Process:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Transfer_Size: 10.106
- Metadata_Reference_Information:
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- Metadata_Date: 20100921
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Richard Eastlake
- Contact_Organization: Photo Science, Inc.
- Contact_Position: Technical Manager
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: 10033 Martin Luther King St. Suite 200
- City: St. Petersburg
- State_or_Province: FL
- Postal_Code: 33716
- Contact_Voice_Telephone: 727-576-9500
- Contact_Facsimile_Telephone: 727-576-9600
- Contact_Electronic_Mail_Address: reastlake@photoscience.com
- Hours_of_Service: 8.00-5.00 Monday through Friday
- Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: local time
- Metadata_Extensions:
-
- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.12 on Thu Nov 07 13:22:28 2019