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http://geoport.whoi.edu/thredds/wms/bathy/smith_sandwell_v11?service=WMS &version=1.3.0 &request=GetMap &bbox=0,50,10,55 &layers=topo &format=image/png &crs=EPSG%3A4326 &width=800 &height=600 &styles=boxfill/redblue |
Use WMS server content
The procedure described above is ullustratory to understand how WMS works, and to implement your own WMS request in scritping languages like Matlab, Python or R. However, most users of WMS will never have to see how WMS works, because user friendly computer programs can construct the WMS urls, or the WMS have been integrated as back-ground technology in portals. Well-known user-friendly WMS clients are Google Earth for the general public, and GIS packages for professionals like ESRI ArcGis.
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Some additional, optional WMS keywords are:
keyword | value | source |
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TRANSPARENT | True | Background transparency of map, valid for encoding format that can handle transparency, e.g. png. |
time | yyyy-mm-ddTHH:MM:SSZ | ISO time notation. Only when data are time-dependent. When not specified for data that is time-depended, the latest time is returned. Time is not implemented in most GIS-minded software packages yet. For an example on how to specify time requests see MapServer . For an example of time implementation see the ADAGUC WMS server and WMS web client. |
elevation | number | elevation of layer desired |
BGCOLOR |
| background color of map |
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WMS offers more than described in this primer. It it also possible to request a legend for a specific style, and to request the data at one pixel an image you requested. For these more sophisticated options, please refer to the full WMS specifications.
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