FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2004

TITLE: HISTORIC RANGE OF CHIPOLA SLABSHELL (ELLIPTIO CHIOLAENSIS), (FAT THREERIDGE (AMBLEMA NEISLERII), GULF MOCCASINSHELL (MEDIONIDUS PENICILLATUS), OCHLOCKONEE MOCCASINSHELL (MEDIONIDUS SIMPSONIANUS), OVAL PIGTOE (PLEUROBEMA PYRIFORME), PURPLE BANKCLIMBER (ELLIPTOIDEUS SLOATIANUS), AND SHINY-RAYED POCKETBOOK (LANSILIS SUBANGULATA) 

Geodataset Name:       MUSSELS_HISTORIC
Geodataset Type:       SHAPEFILE
Geodataset Feature:    LINE
GENERAL DESCRIPTION: 




This shapefile was created to visually represent the historic 
range of the listed mussels species. Also, the dataset was 
created to calculate the species range in river miles so an 
estimate of historically occupied habitat could be determined.






DATA SOURCE(S):                    U.S. Fish and Wildlife Service
SCALE OF ORIGINAL SOURCE MAPS:     N/A
DATE OF AUTOMATION OF SOURCE:      1980
GEODATASET EXTENT:                 State of Forida

FEATURE ATTRIBUTE TABLES: 

Datafile Name: MUSSELS_HISTORIC.DBF
ITEM NAME WIDTH TYPE N. DECIMAL DEGREES
FID
4 OID ---
Shape
0 Geometry ---
LENGTH_MET
16 Number 3
LENGTH_MIL
11 Number 3
NAME
99 String ---
COMMENTS
80 String ---
SUB_BASIN
32 String ---
STATE
3 String ---
SOURCETHM
16 String ---
LABEL
32 String ---
FWS_SOURCE
16 String ---
COM_NAME
31 String ---
LATIN_NAME
23 String ---
DATE
20 String ---
DESCRIPT
31 String ---

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item

Item Description





FID

Internal feature number.
















Shape

Feature geometry.
















LENGTH_MET

River Length in meters
















LENGTH_MIL

River Length in miles
















NAME

River or Stream Name
















COMMENTS

Additional Comments
















SUB_BASIN

Sub-basin of Range
















STATE

State
















SOURCETHM

NHD Hydrologic Unit Code
















LABEL

Labels for mapping purposes
















FWS_SOURCE

Source from which the data was created
















COM_NAME

Common name
















LATIN_NAME

Latin name
















DATE

Date the data was created
















DESCRIPT

FGDL added field based on COM_NAME
















USER NOTES:







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























A note concerning data scale:

Scale is an important factor in data usage. Certain scale 
datasetsare 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.

1:250000 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 analyses. Every 
effort has been made to supply the user with data 
documentation. For additional information, see the 
References sectionand the Data Source Contact section of 
this documentation. For more information regarding scale 
and accuracy, see our web pages at:

http://www.geoplan.ufl.edu/education.html






REFERENCES: 






U.S Fish and Wildlife Services:

http://www.fws.gov/







DATA LINEAGE SUMMARY: 









Source data:

National Hydrography Dataset medium resolution arc data.
The NHD is based upon the content of USGS
Digital Line Graph (DLG) hydrography data integrated with reach-
related information from the EPA Reach File Version 3 (RF3). The
NHD supersedes DLG and RF3 by incorporating them, not by replacing
them. 

This data set was created using ArcView 3.2a

1) A list of occupied rivers and streams was compiled using
all available sources of mussel locations. These included
written sources and any existing GIS layers depicting
mussel locations and collections sites. Based on these
point locations, an upper extent was described for each
river or stream. For currently occupied ranges, a lower
extent was also described for each river or stream.
Continuous ranges were assumed for historically occupied
rivers and streams, so no lower extent was used. Instead,
the ranges extend downstream to the junction with the main
river.

2) Because the point locality typically occurred at a
bridge crossing, the occupied range was extended at least
one mile above the highest collection point and one mile
below the lowest collection point. 

3) Rivers and streams were selected from the NHD by performing
queries on the name field in the reach files. Rivers and
streams were also selected manually in the view. These
selections were then used to select the appropriate rivers
and streams in the NHD arc files. By using the arc files,
only river centerlines would be included in the ranges,
ensuring greater accuracy when calculating river miles.

4) Depending on the range of each species, selected records
from the NHD arc files for the Suwannee, Ochlockonee,
Apalachicola, Chattahoochee, Flint, Chipola, and Econfina
river basins were merged together using the X-Tools
extension (version 6/1/2001) Merge Themes command.

5) The tables of the resulting data layers were attributed
with the following fields: river or stream name, comments,
sub-basin, state, and NHD source theme.

6) Then the data layers were projected from Geographic to
UTM NAD 83, Zone 16, meters, using the ArcView Projector!
extension. 

7) The field Length in Meters was added to the attribute
tables using the X-Tools extension Calculate Length
command. The field Length in Miles was also added to the
attribute tables using the field calculator request
[Length_meters] / 1609.344. This field was queried by river
or stream name to calculate the occupied habitat in river miles.
Process Date: Unknown









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:




U.S. Fish and Wildlife Service
USFWS
1601 Balboa Ave.
Panama City, FL
32405
850-769-0552 x244


http://www.fws.gov/
wendy_gierhart@fws.gov
Wendy Gierhart







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