Context Rendering is a service that creates a map image from OGC WMS context
documents. The service accesses a particular context document by downloading it from
a URL specified as one of the service parameters. The output of the service is currently
GIF images. The Context Rendering service will return any errors it finds in a PNG format.
The context document URL is specified along with other additional parameters in either a
GET or POST HTTP request to the ContextRenderer Servlet. The Servlet can render the
image between 10x10 and 2000x2000, along with specific background colors. You can
also specify a bounding box so that the generated map image will include only image data
within the specified box and override any bounding box in the context document.
Context Rendering
Parameters
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When passing a context document to the rendering service, the following parameters
can manipulate the response of the service to your requirements.
WIDTH: Integer (10...2000). Defaults to 800.
HEIGHT: Integer (10...2000). Defaults to 600.
BGCOLOR: String ("0xrrggbb"). A six digit hexadecimal number preceded by 0x which represents the background color. Defaults to 0x000000.
CONTEXTURL(mandatory): String - HTTP URL to a context document.
BBOX: String (minx,miny,maxx,maxy) - A comma-separated list of decimal geographic coordinates which define a bounding box. minx refers to the western bound (-180.0...180.0), miny refers to the southern bound (-90.0...90.0), maxx refers to the eastern bound (-180.0...180.0), and maxy refers to the northern bound (-90.0...90.0). If omitted, uses BBOX in context.
Note: The aspect ratio between the width & height should be the same as the aspect ratio of the bounding box coordinates.
Example Interface for Context Rendering
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Please see the parameters list for information on how to configure parameters.
Context Rendering
