File Geodatabase Feature Class

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World, Ocean, Reefs


This layer contains major coral reefs and atolls located around the world. This polygon file is intended for large scale thematic mapping and analysis.



The spatial data were obtained from the Natural Earth website. The data originated primarily from the World Data Bank 2 with additions from other various sources. The data are suitable for making relatively generalized maps of countries and regions and are intended for use at a scale no larger than 1:10,000,000. Attributes were modified to include scalerank and type. The coordinate system of this data is WGS 1984.

"Great barrier reef off Australia and reefs elsewhere could use better definition." - Natural Earth


Center for Geospatial Technology, Texas Tech University
Natural Earth

Use limitations


West  -180.000000    East  180.000000
North  28.445189    South  -29.984061

Scale Range
Maximum (zoomed in)  1:5,000
Minimum (zoomed out)  1:150,000,000

ArcGIS Metadata 

Topics and Keywords 

*Content type  Downloadable Data


*Title WRD_Reefs_Detail_NE

Presentation formats* digital map

Resource Details 

Dataset languages* English (UNITED STATES)

Spatial representation type* vector

*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS

Center for Geospatial Technology, Texas Tech University
Natural Earth

ArcGIS item properties
*Name WRD_Reefs_Detail_NE
*Location file://\\cgstdb\CGSTGeognet\Geognet\Geognet2014\WRDLayers2014\WRD_Oceans\Oceans.gdb
*Access protocol Local Area Network


Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -180.000000
*East longitude 180.000000
*North latitude 28.445189
*South latitude -29.984061
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude -180.000000
*East longitude 180.000000
*South latitude -29.984061
*North latitude 28.445189
*Extent contains the resource Yes

Spatial Reference 

ArcGIS coordinate system
*Type Geographic
*Geographic coordinate reference GCS_WGS_1984
*Coordinate reference details
Geographic coordinate system
Well-known identifier 4326
X origin -400
Y origin -400
XY scale 11258999068426.238
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 8.983152841195215e-009
Z tolerance 0.001
M tolerance 0.001
High precision true
Left longitude -180
Latest well-known identifier 4326
Well-known text GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],METADATA["World",-180.0,-90.0,180.0,90.0,0.0,0.0174532925199433,0.0,1262],AUTHORITY["EPSG",4326]]

Reference system identifier
*Value 4326
*Codespace EPSG
*Version 8.2.6

Spatial Data Properties 

*Level of topology for this dataset  geometry only

Geometric objects
Feature class name WRD_Reefs_Detail_NE
*Object type  composite
*Object count 1043

ArcGIS Feature Class Properties
Feature class name WRD_Reefs_Detail_NE
*Feature type Simple
*Geometry type Polyline
*Has topology FALSE
*Feature count 1043
*Spatial index TRUE
*Linear referencing FALSE


Distribution format
*Name File Geodatabase Feature Class


Details for object WRD_Reefs_Detail_NE 
*Type Feature Class
*Row count 1043

*Data type OID
*Width 4
*Precision 0
*Scale 0
*Field description
Internal feature number.

*Description source

*Description of values
Sequential unique whole numbers that are automatically generated.

Field Shape
*Alias Shape
*Data type Geometry
*Width 0
*Precision 0
*Scale 0
*Field description
Feature geometry.

*Description source

*Description of values
Coordinates defining the features.

Field scalerank
*Alias scalerank
*Data type Double
*Width 8
*Precision 0
*Scale 0

Field featurecla
*Alias featurecla
*Data type String
*Width 32
*Precision 0
*Scale 0

Field Shape_Length
*Alias Shape_Length
*Data type Double
*Width 8
*Precision 0
*Scale 0
*Field description
Length of feature in internal units.

*Description source

*Description of values
Positive real numbers that are automatically generated.

Metadata Details 

*Metadata language English (UNITED STATES)
*Metadata character set  utf8 - 8 bit UCS Transfer Format

Scope of the data described by the metadata* dataset
Scope name* dataset

*Last update 2015-01-05

ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style Item Description
Standard or profile used to edit metadata ItemDescription

Created in ArcGIS for the item 2014-12-12 12:58:59
Last modified in ArcGIS for the item 2015-01-05 93:51:80

Automatic updates
Have been performed Yes
Last update 2015-01-05 09:34:44

FGDC Metadata (read-only) 

Entities and Attributes