World Resources Institute
2011
Reefs at Risk Revisited
Washington, DC, United States
World Resources Institute
withheld
Burke, L., K. Reytar, M. Spalding, and A. Perry. Reefs at Risk Revisited. (Washington, DC, USA: World Resources Institute, 2011).
2011
withheld
Tropical Coral Reefs of the World (500-m resolution grid converted to polygon)
reef_500_poly
vector digital data
http://imars.usf.edu/MC/index.html
Global map of shallow, tropical coral reefs, gridded at 500-m resolution for use in the Reefs at Risk Revisited project and converted to polygon.
The coral reef location data were compiled from multiple sources by UNEP-WCMC, the WorldFish Center, and WRI. To standardize these data for the purposes of the Reefs at Risk Revisited project, data were converted to raster format (ESRI grid) at 500-m resolution. The original sources for the data include: - Institute for Marine Remote Sensing, University of South Florida (IMaRS/USF) and Institut de Recherche pour le Développement (IRD). Millennium Coral Reef Mapping Project, 2009 (30 m Landsat data classified and converted to shapefile).
- UNEP-WCMC. Coral Reef Map, 2002.
- Additional data have been acquired or digitized from a variety of sources. Scales typically range from 1:60,000 to 1:1,000,000. Sources include: the United Kingdom Hydrographic Office, Petroconsultants (CES) Ltd, NOAA, UNEP/IUCN, United States Department of the Interior (USDI) Geological Survey, Department of Lands and Survey (DLS), Directorate of Overseas Surveys (DOS), Great Barrier Reef Marine Park Authority, Wildlife Conservation Society-Fiji, Florida Department of Environmental Protection, Instituto Geográfico Nacional (IGN), Reefs at Risk in Southeast Asia (World Resources Institute), National Mapping and Resources Information Authority (NAMRIA), Digital Chart of the World, Google Earth, REBIOMA, World Wildlife Fund-Salary Bay, Shell, and University of the Philippines Marine Sciences Institute.
- Due to variation in the scale, precision, and source of coral reef input data (see above), the geo-processing of the global map of coral reefs involved converting polyline and polygon reef layers into a 500-m resolution raster grid. The gridding process included the following steps: 1. Coral reefs that were mapped as polylines were buffered to an extent of 300 m and then merged with the polygon map of coral reefs. 2. The polygon map of coral reefs was converted to grid such that if a reef polygon covered at least 8% of a 500-m grid cell, then the grid cell was considered a reef grid cell.
This gridding methodology was performed to avoid either over- or underestimating coral reef area due to the differences in the input data.
en
Shapefile of reef locations are based on 500 meter resolution gridded data reflecting shallow, tropical coral reefs of the world. Organizations contributing to the data and development of the map include the Institute for Marine Remote Sensing, University of South Florida (IMaRS/USF), Institut de Recherche pour le Développement (IRD), UNEP-WCMC, The World Fish Center, and WRI. The composite data set was compiled from multiple sources, incorporating products from the Millennium Coral Reef Mapping Project prepared by IMaRS/USF and IRD.
2011
publication date
None planned
-180.000000
180.000000
32.518077
-32.041436
-18663507.067162
14601492.932838
-3365385.331926
3410114.668074
coral
coral reefs
reefs
world
global
None
Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable, WRI cannot assume liability for any damages or misrepresentations caused by any inaccuracies in the data, or as a result of the data used on a particular system. WRI makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
World Resources Institute
mailing and physical address
10 G Street, NE Suite 800
Washington
DC
20002
United States
reefsatrisk@wri.org
9 am - 5 pm EST
ESRI ArcCatalog 9.3.1.3000
Shapefile
Institute for Marine Remote Sensing, University of South Florida (IMaRS/USF), Institut de Recherche pour le Développement (IRD), UNEPWCMC, The WorldFish Center and WRI, 2011. Global coral reefs composite data set compiled from multiple sources, incorporating products from the Millennium Coral Reef Mapping Project prepared by IMaRS/USF and IRD.
World Resources Institute
GIS Data Manager
202-729-7653
202-729-7600
reefsatrisk@wri.org
Downloadable Data and Data CD
11.985
11.985
20110406
World Resources Institute
GIS Data Manager
mailing and physical address
Washington
DC
20002
10 G Street NE Suite 800
United States
202-729-7600
reefsatrisk@wri.org
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
en
20130823
10523300
FALSE
20211006
10150700
20211006
10150700
1.0
Reefs__reefs_at_risk_revisited_WRI_
002
-18663507.067162
14601492.932838
-3365385.331926
3410114.668074
1
14.474
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/2.8.0'><WKT>PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem>
INSPIRE Metadata Directive
20211006
GCS_WGS_1984
WGS_1984_Cylindrical_Equal_Area
D_WGS_1984
WGS_1984
6378137.000000
298.257224
coordinate pair
meters
0.000000
0.000000
Esri ArcGIS 12.8.0.29751
Reefs__reefs_at_risk_revisited_WRI_
-18663507.067162
14601492.932838
3410114.668074
-3365385.331926
1
-180
180
32.518077
-32.041436
1
1
-180.000000
180.000000
32.518077
-32.041436
ISO 19115 Geographic Information - Metadata
DIS_ESRI1.0
dataset
withheld
Local Area Network
002
11.985
Shapefile
Enterprise Geodatabase Feature Class
14.474
Vector
Simple
FALSE
0
TRUE
FALSE
WGS_1984_Cylindrical_Equal_Area
EPSG
6.18.3(9.3.1.2)
2
1
80150
500
Meter
1 Meter = 1 Meter(s)
25456
500
Meter
1 Meter = 1 Meter(s)
0
Reefs__reefs_at_risk_revisited_WRI_
Feature Class
0
objectid
objectid
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
shape
Geometry
8
0
0
Feature geometry.
ESRI
Coordinates defining the features.
Geomorphic
Geomorphic
String
20
0
0
area_km2
area_km2
Double
8
38
8
ocean
ocean
String
20
0
0
st_area(shape)
st_area(shape)
Double
0
0
0
st_length(shape)
st_length(shape)
Double
0
0
0