Geodataset Name:       SEAGRS_JUN19
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         56960

DATA SOURCE(S):                    Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute
SCALE OF ORIGINAL SOURCE MAPS:     Varies
GEODATASET EXTENT:                 State of Florida

PUBLICATION DATE:                  20190620
TIME PERIOD OF CONTENT:            Begin Date: 1987    End Date: 2017
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: SEAGRS_JUN19.DBF

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
Shape	Feature geometry.
SEAGRASS	Description of seagrass density Discontinuous = Discontinuous seagrass may range from 0 to 90% ground cover. The user should be aware that different sources and scales of seagrass information and classification systems were used to create this dataset Continuous = Continuous seagrass may range from 85% ground cover to 100%. The user should be aware that different sources and scales of seagrass information and classification systems were used to create this dataset
SOURCEDATE	Ground condition date of source data
METADATA	This field will contain a hyperlink to metadata for the source data of each polygon
DESCRIPT	Description of submerged aquatic vegetation
FGDLAQDATE	FGDL added field based on date data was received from the source
AUTOID	Unique ID added by GeoPlan
SHAPE.AREA	Area in meters
SHAPE.LEN	Perimeter in meters

USER NOTES:

These data appear logically consistent. Geodatabase topology was run to detect overlapping polygons - none are present. Polygons with area less than 1 square meter were removed. Some slivers may be present.

These data are complete as of data available to FWRI in June, 2017. The study areas for the source data varied. With the exception of the Springs Coast mapped in 2016, offshore data have not been mapped to any consistent distance or depth statewide. Broward and Collier counties are included; however, these counties were mapped using field measurements, rather than complete aerial photography, so additional unmapped seagrass may still be present within these counties. Additional data gaps may be present. Contact GIS Librarian to request extent of mapping.

GeoPlan relied on the integrity of the attribute information within the original data.

Prior to July 1, 2004, the Fish and Wildlife Research Institute (FWRI) was known as the Florida Marine Research Institute (FMRI). The institute name has not been changed in historical data sets or references to work completed by the Florida Marine Research Institute. The institute name has been changed in references to ongoing research, new research, and contact information. These data are for statewide mapping and analysis only. The original regional data sets may contain more detailed seagrass attribution schemes. Contact GIS Librarian to request the source data sets.

This GIS data set was developed to represent the most recent seagrass mapping available in Florida for current statewide display and analysis. Not all areas have been mapped. This data set includes areas that were not previously mapped in other statewide compilations. This data set is not appropriate for time series comparisons to previous statewide compilations.

Positional accuracy varies according to source data. No positional alterations have been performed for this compilation.

This data is provided 'as is' and its vertical positional accuracy has not been verified by GeoPlan

Acknowledgment of the Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute as the data source would be appreciated in any products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected by users of this data. Please cite the original metadata when using portions of the record to create a similar record of slightly altered data, such as reprojection. If any data are modified or adjusted, please share the edited information with FWC. Users should be aware that comparison with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in mapping conventions, data collection, and computer processes over time. Users are strongly encouraged to read and fully comprehend the metadata prior to using this dataset. Please refer to the original source metadata where applicable. FWC shall not be liable for improper or incorrect use of this data. These data are not legal documents and are not to be used as such. This is not a survey data set and should not be utilized as such. These data are not to be used for navigation.

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

REFERENCES:

For more information contact the Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute, Division of Marine Fisheries Management (DMFM) GIS data librarian at gislibrarian@myfwc.com

DATA LINEAGE SUMMARY:

FWRI staff added four attributes to each data set: SEAGRASS - indicates "continuous" or "discontinuous". If a seagrass data set only indicated presence/absence this attribute defaulted to discontinuous. SOURCEDATE - year(s) of photography. Also indicates if date is unknown or if the polygon was not interpreted from photography. METADATA - the information in this field will be populated with a link to the metadata for the source data set that the polygon came from once the source metadata is online. Currently it is the source data set name used as a placeholder. DESCRIPT - standardized name field for labeling maps. Values include "Continuous Seagrass", or "Discontinuous Seagrass". Staff used the most recent information for an area. Staff determined the most recent information by creating footprints of all source polygons, minus any large land polygons and uninterpreted areas. Staff used these footprints with the ArcGIS Toolbox command "erase" to eliminate areas of overlap from older source data sets. In some areas the exclusion of shoreline resulted in sliver polygons due to different studies using different shorelines. Staff manually deleted these slivers after the "erase", defaulting to the more recent shoreline coverage. Once all the data were properly "erased", staff loaded all of the data into a single geodatabase feature class. Running a topology resulted in no overlaps. If an area was uninterpreted within a more recent study, but interpreted in an older study, then the older study was used. Sliver polygons less than one square meter were deleted. Any additional slivers are either due to preserving the "Source" attribute or they were present in the original source data sets. Process Date: 2010 The data set was updated to include the 2009 seagrass data from SJRWMD. Process Date: 20100929 The data set was updated to include the 2010 seagrass from SWFWMD Process Date: 201103 Where necessary, FWRI projected new datasets to NAD_1983_2011_Florida_GDL_Albers before processing according to the 2010 procedure. The dataset was updated to include 2007 Naples Bay seagrass data from the Conservancy of SW FL; 2010 Florida Bay seagrass data from Avineon, Inc.; 2010 Florida Panhandle data, 2014 Estero Bay, and 2016 Southwest Florida data from Photo Science, Inc. (now Quantum Spatial); 2011 data for the Caloosahatchee, Loxahatchee and St. Lucie Rivers from Dial Cordy & Associates; 2014 Rookery Bay data from Scheda Ecological Associates, Inc.; 2011 data for the Gulf Islands National Seashore from the U.S. National Park Service; 2015 data for the Indian River Lagoon from the St. Johns Water Management District; 2016 data for the Springs Coast from the Southwest Florida Water Management District and Avineon, Inc., and 2013 data for Lake Worth Lagoon from Palm Beach County Environmental Management. Additional data sets from the Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute were also added including 2007 data for Choctawhatchee Bay, and 2004 - 2015 seagrass data from the Unified Florida Reef Tract Map, Version 2. Process Date: 201706 The data set was updated to include SJRWMD's 2017 seagrass data. Process Date: 20180925 Staff reclassified all seagrass features in the Springs Coast 2016 dataset with FLUCCS code 9111 "Sparse-Medium Seagrass" as "Continuous" to match the classification used in the updated FWC Seagrass Integrated Mapping and Monitoring Program (SIMM) Mapping and Monitoring Report No. 3. This reclassified dataset replaces the previous version in the final compilation. Process Date: 20190620 GeoPlan downloaded this data in shapefile format from the Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute FTP site on June 28, 2019. The data was received as a shapefile in projection: NAD_1983_2011_Florida_GDL_Albers. The dataset was then projected from NAD_1983_2011_Florida_GDL_Albers to FGDL Albers HARN using NAD_1983_To_HARN_Florida transformation. This dataset is now received in the NAD_1983_2011_Florida_GDL_Albers projection. Previously it came in a custom PCS Albers projection. Projecting using the following transformation: nad_1983_harn_to_nad_1983_2011 has introduced a shift between 0.5 and 1 meter. - Reprojected data to FGDL Albers HARN - DESCRIPT field was already present. Fields were reordered. - Added an FGDLAQDATE field based on date received from source - Renamed shapefile from seagrass_fl_poly to SEAGRS_JUN19 - Upcased all records in the attribute table Process Date: 20190702 Dataset copied. Process Date: 20190705

MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:

Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute
FFWCC-FWRI
100 Eighth Avenue Southeast
St. Petersburg, Florida
33701
727-896-8626


http://geodata.myfwc.com/
GISLibrarian@MyFWC.com
GISLibrarian

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.fgdl.org

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