pre-release version 0.9 (September, 2001)
© Pedro Pereira Gonçalves (pedro@inovagis.org)
GIServer is capable of registering new spatial data process algorithms and defining them as new services (defined in the Services Available property). This feature is enhanced by the possibility of making composite requests that will chain a different number of other services. These services can be locally on the server or in other remote Internet Server. For example the RGB function needs three layers as input parameters and with them creates three new GETMap requests. With the images returned by these requests, it creates a color composition where each image goes respectively to the red, blue and green channel. For example the request for a color composition from a temporal data set of NOAA/AVHRR satellite images creates three new requests to a GetMap service that will draw the necessary bands of the color composition.  It is still possible to chain other services to this request by asking to overlay a given file to the color compositions  The request URL LAYERS parameter would be : LAYERS=RGB(portugal.noaa.band1,portugal.noaa.band2,portugal.noaa.band3),portugal.conc See Also : Cascading requests example, Requesting functions, Creating a New Function | ||||||||||||||
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