Page History

...

• layers (required): the layerId of the plot to display. Only one layerid is supported.
• time (required, optional since 2021.01): the time for which the grid has to be plotted. Only one time is supported. Time ranges are NOT supported. Time has to be in the xml dateformat:  yyyy-MM-ddTHH:mm:ssZ. The times returned by the GetCapabilities are in this format as well. Since 2020.02 milliseconds are supported as well in the format: yyyy-MM-ddTHH:mm:ss.sssZ. Since 2021.01 the default time as reported by the GetCapabilities will be used if no time parameter was specified.
• elevation (optional, since 2020.02): for 3d grids an elevation can be specified. The elevations should be inside the range as reported by the GetCapabilities.
• width (optional): width of the image. Default is 800. 
• height (optional): height of the image. Default is 600
• version (optional): supported version is 1.3 and is the default if not set. Older versions might work, but are not supported
• crs (required): the output projection of the plot. Only supported projection is: EPSG:3857
• bbox (required): the bounding box (in the projection as defined by the SRS parameter) of the extent that should be plot.
• styles (optional, since 2020.02 ): a style can be passed as request parameter by passing the styles parameter. N.B. only one style can currently be passed to the GetMap request.  For example: styles=Class.Temperature.Extreme. Available styles are reported by GetCapabilities per layer.
• format (optional, image/png is the default): image/png or image/tiff is supported. Image tiff is only supported for wind layers using u and v time series in combination with the following vendor parameters: convertUVtoRG and convertMagnitudeDirectiontoRG.

Vendor specific request parameters

• showContours (optional, since 2018.02): Display contour lines if enabled in the gridplot. Default is false. Set to true to show contour lines.
• externalForecastTime (optional, dateTime: yyyy-MM-ddTHH:mm:ssZ, since 2019.02): get the map for a specific forecast time. If omitted the latest/current forecast is returned
• importFromExternalDataSource (boolean, optional, default=false, since 2020.01): apply seamless integration with the archive. Only valid for external forecasts. Both an externalForecast time and layers have to be specified as well.
• ensembleId (optional). Since 2020.01. Specify the ensemble id of the requested grid. When using this parameter, specifying the ensembleMemberId is required as well. The available ensembleId is reported by the GetCapabilities request.
• ensembleMemberId (optional). Since 2020.01. Specify the ensemble member id of the requested grid. When using this parameter, specifying the ensembleId is required as well. The available ensembleMemberIds are reported by the GetCapabilities request.
• dim_ensemble_member (otpional). Since 2020.01. This parameter can be used instead of the ensembleId and ensembleMemberId parameters and follow the recommendations in: https://docs.opengeospatial.org/bp/16-086r3/16-086r3.html#23. This parameter can be used to pass both the ensembleId and ensembleMemberId separated by a underscore. For example: dim_ensemble_member=MOSurge_1
• colorscalerange (optional, since 2020.02): rescale the colors in the map by changing the min and max values of the range. The minimum value and maximum value are separated by a comma, For example: colorscalerange=2.0,10.0. This option can be used for legends as well.

Restrictions:

• convertUVtoRG (optional, default = false, since 2021.02):  Only supported in combination with format=image/tiff for wind layers using u and v time series sets. The u and v values will be stored in the R and G values of a TIFF image. The alpha channel is set to 255 if the pixel maps to a grid value. If the pixel is outside the grid, the alpha channel is set to 0. The scales and offsets are stored in geo tiff tags: ModelPixelScaleTag (first double contains the scale for u values, the second double contains the scale for v values) and ModelTiepointTag (first double contains the offset for u values, the second double contains the offset for v values). To calculate the u an v values the pixel values for R and G channels should be multiplied by the scale value and the offet should be added. For example. The R value of a pixel in the TIFF value has value: 200, the u scale = 0.1 and the offset is 1.0. The u value = 200*0.1 + 1.0 = 21.0. A missing value is indicated by setting the R and G value to 255. In case a pixel doesn't map to a grid value, the alpha channel is set the 0. Otherwise the alpha channel is set to 255.
• convertMagnitudeDirectiontoRG (optional, default = false, planned for 2021.02): not implemented yet.
  
  

Restrictions:

• The product of width and height is limited to the full HD resolution of 1920x1200 to avoid memory issues. In case a GetMap request is done The product of width and height is limited to the full HD resolution of 1920x1200 to avoid memory issues. In case a GetMap request is done where WIDTH*HEIGHT > 2304000 a bad request error will be returned. Since 2020.01 the default max width*height has been increased to 10000000.

...

Transparent PNG image of the requested gridPlot for the specified timeStep, size and extent. Since 2021.02 Image tiff is only supported for wind layers using u and v time series in combination with the following parameters: convertUVtoRG=true and convertMagnitudeDirectiontoRG. 

Example request

http://localhost:8080/FewsWebServices/wms?service=WMS&request=GetMap&version=1.3&layers=Temp_forecast_nwp&crs=EPSG%3A3857&time=2018-09-01T00%3A00%3A00.000Z&width=920&height=500&bbox=-1261269.140637805,4786137.922323937,1921144.283455659,6515710.435418212

...