GMRT

Global Multi-Resolution Topography (GMRT)

GMRT Open Geospatial Consortium (OGC) WxS Services

Our Web Map Services (WMS) are available in three projections and allow any OGC-enabled client to access map imagery from our Global Multi-Resolution Topography (GMRT) Synthesis. Use one the following URLS to access GMRT:

WGS 84 / World Mercator (EPSG:3395) or WGS 84 / Latitude/Longitude (EPSG:4326)
- Unmasked: http://gmrt.org/services/mapserver/wms_merc?request=GetCapabilities&service=WMS&version=1.3.0
- Masked: http://gmrt.org/services/mapserver/wms_merc_mask?request=GetCapabilities&service=WMS&version=1.3.0
WGS 84 / Antarctic Polar Stereographic (EPSG:3031)
- Unmasked: http://gmrt.org/services/mapserver/wms_SP?request=GetCapabilities&service=WMS&version=1.3.0
- Masked: http://gmrt.org/services/mapserver/wms_SP_mask?request=GetCapabilities&service=WMS&version=1.3.0
WGS 84 / Arctic Polar Stereographic (EPSG:3995)
- Unmasked: http://gmrt.org/services/mapserver/wms_NP?request=GetCapabilities&service=WMS&version=1.3.0
- Masked: http://gmrt.org/services/mapserver/wms_NP_mask?request=GetCapabilities&service=WMS&version=1.3.0

GMRT REST-type Services

GMRT GridServer is a REST-type service for direct access to gridded data from the GMRT Synthesis. A variety of output formats are supported. Requested data may be up to 1GB in NetCDF, or approximately 14 by 14 degrees at 100 meters per node (maximum available resolution). GeoTIFF and ESRI ASCII grids have smaller node size limits (25% and 12.5% of NetCDF node size respectively). To request larger areas at higher resolution, use our URL Builder Service. More information about the service is available from its documentation page. (Output formats: GMT3 NetCDF, COARDS compliant NetCDF, ESRI ASCII (see note above), and GeoTIFF (see note above))
GMRT ImageServer provides access to images from the GMRT Synthesis. Requested images may be up to 8000 pixels in either dimension. (Output format: jpeg)
- GMRT ImageServer Documentation and Url Builder
- ImageServer WADL description
GMRT Profile Server provides access to bathymetry profiles from the GMRT Synthesis. Profiles are currently 100 points and can be specified as a single line or a multiline segment. (Output formats: json, geojson, plain text)
- GMRT ProfileServer Documentation and Url Builder
- ProfileServer WADL description
GMRT Point Server provides access to point data from the GMRT Synthesis. Point data is retrieved from the highest resolution data available. (Output formats: json, geojson, plain text, xml)
- GMRT PointServer Documentation and Url Builder
- PointServer WADL description
GMRT Cruise Info provides access to cruise metadata from the GMRT Synthesis. (Output formats: json)

GMRT Shape Files

GMRT powers its OGC services with a set of shape files that indicate data coverage and provide attribution information. These are available for direct download to users.
- GMRT contributed grids
- GMRT cruise tracks
- GMRT swath polygons - Polygons of data coverage based on swath file extent corresponding to curated multibeam content (~100m resolution). Includes additional attribution metadata, and GMRT version number. Polygons are aggregated by cruise.