FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: BATHYMETRY FOR THE SOUTHEASTERN UNITED STATES - 2009 

Geodataset Name:       SE_BATHYMETRY_FEB11
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         49
GENERAL DESCRIPTION:
This dataset represents nested polygons at 0, -200, -1,000, -2,000, -3,000, -4,000, -5,000, -6,000, and -7,000 meters which show bathymetry for the Southeastern United States. Bathymetry is the measurement of the depth of an ocean or other large body of water. The data was created from SRTM (Shuttle Radar Topography Mission) Plus. The minus 200 meter bathymetry layer is buffered slightly around all coastlines to avoid coastline overlaps. Isobaths surrounding islands, seamounts, and near other steep slopes received considerable manual generalization to improve legibility. Please Note: This layer is only to be used for large scale cartography via web mapping and should not be released on FGDL. 
DATA SOURCE(S):                    Natural Earth
SCALE OF ORIGINAL SOURCE MAPS:     Unknown
GEODATASET EXTENT:                 Southeastern US, Gulf of Mexico, and Atlantic Ocean

PUBLICATION DATE:                  20091203
TIME PERIOD OF CONTENT:            20091203
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES: 

Datafile Name: SE_BATHYMETRY_FEB11.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
GROUP_
5 String
Shape
4 Geometry
DEPTH
10 String
GROUP_ID
2 SmallInteger
DESCRIPT
10 String
FGDLAQDATE
36 Date
AUTOID
4 Integer
SHAPE.AREA
0 Double
SHAPE.LEN
0 Double

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item

Item Description





OBJECTID

Internal feature number.
















GROUP_

No description
















Shape

Feature geometry.
















DEPTH

Generalized ocean depth in meters.  ABOVE SEA = Above Sea Level.
















GROUP_ID

Group identification based on drawing order.
















DESCRIPT

Based on the field DEPTH.
















FGDLAQDATE

The date FGDL acquired the data from the Source.
















AUTOID

Unique ID added by GeoPlan
















SHAPE.AREA

Area in meters
















SHAPE.LEN

Perimeter in meters




























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.













Bathymetry is the measurement of the depth of an ocean or other large body of water.















The data was created to serve as base information for use in GIS systems 
for a variety of planning and analytical purposes.















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















None

All versions of Natural Earth raster + vector map data found on the website are in 
the public domain. You may use the maps in any manner, including modifying the 
content and design, electronic dissemination, and offset printing. The primary 
authors, Tom Patterson and Nathaniel Vaughn Kelso, and all other contributors 
renounce all financial claim to the maps and invites you to use them for personal, 
educational, and commercial purposes.

No permission is needed to use Natural Earth. Crediting the authors is 
unnecessary.














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: 






Natural Earth:
http://www.naturalearthdata.com/

Shuttle Radar Topography Mission:
http://www2.jpl.nasa.gov/srtm/cbanddataproducts.html









DATA LINEAGE SUMMARY: 








The GeoPlan Center downloaded the worldwide bathymetry data from the 
Natural Earth website (http://www.naturalearthdata.com/) 
on February 21st, 2011.

http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/physical/10m-bathymetry-all.zip

The 10m-bathymetry-all.zip contained the following layers, 
and they were in the GCS_WGS_1984 projection.

10m_bathymetry_A_10000.shp
10m_bathymetry_B_9000.shp
10m_bathymetry_C_8000.shp
10m_bathymetry_D_7000.shp
10m_bathymetry_E_6000.shp
10m_bathymetry_F_5000.shp
10m_bathymetry_G_4000.shp
10m_bathymetry_H_3000.shp
10m_bathymetry_I_2000.shp
10m_bathymetry_J_1000.shp
10m_bathymetry_K_200.shp
10m_bathymetry_L_0.shp

A GROUP field was then added and populated for each layer where the GROUP 
was equal to the alpha code in the layer name (i.e. 10m_bathymetry_A_10000.shp 
GROUP field was equal to the letter A).

Next an extent layer was created based on the worldwide layers extent.  

Next all the bathymetry layers were Appended with the worldwide extent layer to 
create one worldwide bathymetry layer.  

The layers were Appended in the following order to create a proper drawing order.

10m_bathymetry_L_0.shp
10m_bathymetry_K_200.shp
10m_bathymetry_J_1000.shp
10m_bathymetry_I_2000.shp
10m_bathymetry_H_3000.shp
10m_bathymetry_G_4000.shp
10m_bathymetry_F_5000.shp
10m_bathymetry_E_6000.shp
10m_bathymetry_D_7000.shp
10m_bathymetry_C_8000.shp
10m_bathymetry_B_9000.shp
10m_bathymetry_A_10000.shp

Next a DEPTH field was added and populated based on the original layer name 
(i.e. 10m_bathymetry_K_200.shp DEPTH field was equal to 200m).

Next a GROUP_ID field was added and populated.

Next a Southeastern Area Extents box was created for the focus area in the GCS_WGS_1984 projection.

Next the worldwide updated bathymetry layer was clipped to the focus region.  

This clipped layer was then reprojected to the FGDL albers projection NAD83 HARN.

Once in the FGDL albers projection this clipped layer was then reclipped using a slightly smaller southeastern 
extents box so as to square up the perimeter of the final layer.

Next this newly created reclipped bathymetry layer was renamed to southeast_bathymetry.shp

A DESCRIPT field was then added based on DEPTH.
A FGDLAQDATE field was also added and populated.
Process Date: 20110225


Data imported to ArcSDE and exported as a shapefile.
Process Date: 20110302









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:




Natural Earth
Natural Earth
Physical Location Not Available
Unknown, Unknown
Unknown



http://www.naturalearthdata.com/downloads/10m-physical-vectors/10m-bathymetry/
nathaniel@naturalearthdata.com
Nathaniel Vaughn









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

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