FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: Johnson Seagrass Critical Habitat

Geodataset Name:       JOHN_SGRASS
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         10
GENERAL DESCRIPTION:
These data represent the critical habitat for Johnson's Seagrass as designated by Federal Register Vol. 65, No. 66, Wednesday, April 5, 2000, Rules and Regulations.
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
4 OID ---
Id
6 Number ---
SHAPE
4 Geometry ---
AUTOID
4 Integer ---
SHAPE.AREA
0 Double ---
SHAPE.LEN
0 Double ---
Location
50 String ---
Acre
19 Number 11
DESCRIPT
50 String ---

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

Id User Assigned Unit Identification number used for data creation.

SHAPE Feature geometry.

AUTOID FGDL Unique ID

SHAPE.AREA Area in meters

SHAPE.LEN Perimeter in meters

Location Name of physical location of designated unit

Acre Number of Acres

DESCRIPT GeoPlan added field based on LOCATION


USER NOTES:
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

REFERENCES:
50 CFR Part 226

DATA LINEAGE SUMMARY:
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

GeoPlan added Descript based on LOCATION, renamed file from john_sgrass_CH_FL_2003_po to john_sgrass.shp, and projected to FGDL Albers Process Date: 20050808
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:
NOAA/NESDIS/NODC/NCDDC- National Coastal Data Development Center
NCDCC
Building 1100
Stennis Space Center, MS
39529
866-732-2382

chris.henton@noaa.gov Chris Henton

FGDL CONTACT:
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