FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION TITLE: FLORIDA'S STATEWIDE SEAGRASS - 2011 Geodataset Name: SEAGRS_2011 Geodataset Type: SHAPEFILE Geodataset Feature: Polygon Feature Count: 27116 |
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GENERAL DESCRIPTION:
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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 |
FEATURE ATTRIBUTE TABLES:
Datafile Name: SEAGRS_2011.DBF
ITEM NAME | WIDTH | TYPE |
OBJECTID
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4 | OID |
Shape
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4 | Geometry |
SEAGRASS
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20 | String |
SOURCEDATE
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20 | String |
METADATA
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30 | String |
DESCRIPT
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50 | String |
FGDLAQDATE
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36 | Date |
AUTOID
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4 | Integer |
SHAPE.AREA
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0 | Double |
SHAPE.LEN
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0 | Double |
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
Item | Item Description | |
OBJECTID |
Internal feature number. |
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Shape |
Feature geometry. |
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SEAGRASS |
Description of seagrass density
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SOURCEDATE |
Ground condition date of source data. |
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METADATA |
This field will contain a hyperlink to metadata for the source data of each polygon. |
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DESCRIPT |
Description of submerged aquatic vegetation. |
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FGDLAQDATE |
FGDL added field based on date acquired from source |
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AUTOID |
Unique ID added by GeoPlan |
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SHAPE.AREA |
Area in meters |
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SHAPE.LEN |
Perimeter in meters |
These data appear logically consistent. Geodatabase topology was run to detect overlapping polygons - none are present. Some slivers may be present. |
These data are complete as of data available to FWRI in September, 2010. The study areas for the source data varied. 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. 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 |
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 http://ocean.floridamarine.org/mrgis/Description_Layers_Marine.htm |
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 uninterrupted 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 |
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 Fish and Wildlife Research Institute, 100 Eighth Avenue Southeast St. Petersburg, Florida 33701 727-896-8626 |
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 Contact FGDL: Technical Support: http://www.fgdl.org/fgdlfeed.html FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html For FGDL Software: http://www.fgdl.org/software.html