FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION TITLE: Johnson Seagrass Critical Habitat Geodataset Name: JOHN_SGRASS Geodataset Type: SHAPEFILE Geodataset Feature: Polygon Feature Count: 10 |
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GENERAL DESCRIPTION:
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DATA SOURCE(S): National Oceanic and Atmospheric Administration (NOAA) SCALE OF ORIGINAL SOURCE MAPS: Unknown DATE OF AUTOMATION OF SOURCE: 20031114 GEODATASET EXTENT: State of Florida |
FEATURE ATTRIBUTE TABLES:
Datafile Name:
ITEM NAME | WIDTH | TYPE | N. DECIMAL DEGREES |
OBJECTID
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4 | OID | --- |
Id
|
6 | Number | --- |
SHAPE
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4 | Geometry | --- |
AUTOID
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4 | Integer | --- |
SHAPE.AREA
|
0 | Double | --- |
SHAPE.LEN
|
0 | Double | --- |
Location
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50 | String | --- |
Acre
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19 | Number | 11 |
DESCRIPT
|
50 | String | --- |
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
Item | Item Description | |
OBJECTID |
Internal feature number. |
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Id |
User Assigned Unit Identification number used for data creation. |
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SHAPE |
Feature geometry. |
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AUTOID |
FGDL Unique ID |
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SHAPE.AREA |
Area in meters |
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SHAPE.LEN |
Perimeter in meters |
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Location |
Name of physical location of designated unit |
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Acre |
Number of Acres |
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DESCRIPT |
GeoPlan added field based on LOCATION |
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. |
GeoPlan relied on the integrity of the attribute information within the original data. In addition to the coordinates provided in the Federal Register document, the following data were used to assist in the production of this dataset: US Army Corps of Engineers - IWW_IR to DA.dgn (Microstation Design File depicting the Intracoastal Waterway), Miami Harbor 83-90.dgn (Microstation Design File epicting the federally authourized navigation channels in Miami Harbor; According to the USACE, these channels are likely to be updated in the near future). St. John's River Water Management District - cb24_det.e00 (ArcInfo Interchange format file, converted to an ArcInfo Coverage depicting a detailed shoreline, last update 12/10/99.) |
POLYGON |
The purpose of these data is to visually represent the critical habitat areas for GIS analysis and display. |
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 |
Due to the collection of data used in this analysis from multiple data sources, some instances occur where the USACE ICW file intersects areas of the SJRWMD file classified as "Land", particularly in the vicinity of Hobe Sound. Clearly this is not the real world situation and efforts will be made to resolve these conflicts in the data. At this time, these were the best data available. The text description in 50 CFR Part 226 is always the one, true definition of Johnson's seagrass critical habitat. These or any other depictions are for information purposes only and shouldn't be relied on for regulatory purposes. THE DATA INCLUDED IN FGDL ARE 'AS IS' AND SHOULD NOT BE CONSTRUED AS LEGALLY BINDING. 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 modelling 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 |
50 CFR Part 226 |
A point layer was created using the coordinates in the Federal Register. Those points were then used to digitize polygons. The polygons were then "clipped" to a detailed shoreline (cb24_det.e00) obtained from St. John's River Water Management District (SJRWMD). Following the clip operation, microstation design files of the ICW and Miami Harbor navigation channels were obtained from the US Army Corps of Engineers (USACE) and converted to shapefiles. The final ICW shapefile was created by using a 62.5ft buffer on either side of the centerline and editing that buffer file to match the widening areas in the vicinity of the critical habitat areas. The final Miami Harbor shapefile was created by digitizing a polygon over the channel edge line work in the design file. An Edit Clip was then performed to "punch a hole" through the Critical Habitat areas where they intersected the ICW and the Miami Harbor navigation channel, thus excluding the federally authorized navigation channels from the Critical Habitat areas. Finally, the data in the vicinity of Miami Harbor in Biscayne Bay were edited visually to correspond to the paper maps in the federal register document. Additionally, all data used were reprojected to match the detailed shoreline. (UTM Zone 17, NAD 83, HARN) Process Date: 20031114 |
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: |
NOAA/NESDIS/NODC/NCDDC- National Coastal Data Development Center NCDCC Building 1100 Stennis Space Center, MS 39529 866-732-2382 |
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