| Parameter | Required | Description |
| VERSION | Required | Version as required by OGC interfaces. |
| REQUEST | Required | Value must be GetLegendRequest . |
| LAYER | Required | Layer for which to produce legend graphic. |
| STYLE | Optional | Style of layer for which to produce legend graphic. If not present, the default style is selected. The style may be any valid style available for a layer, including non-SLD internally-defined styles. |
| FEATURETYPE | Optional | Feature type for which to produce the legend graphic. This is not needed if the layer has only a single feature type. |
| RULE | Optional | Rule of style to produce legend graphic for, if applicable. In the case that a style has multiple rules but no specific rule is selected, then the map server is obligated to produce a graphic that is representative of all of the rules of the style. |
| SCALE | Optional | In the case that a RULE is not specified for a style, this parameter may assist the server in selecting a more appropriate representative graphic by eliminating internal rules that are outof- scope. This value is a standardized scale denominator, defined in Section 10.2 |
| SLD | Optional | This parameter specifies a reference to an external SLD document. It works in the same way as the SLD= parameter of the WMS GetMap operation. |
| SLD_BODY | Optional | This parameter allows an SLD document to be included directly in an HTTP-GET request. It works in the same way as the SLD_BODY= parameter of the WMS GetMap operation. |
| FORMAT | Required | This gives the MIME type of the file format in which to return the legend graphic. Allowed values are the same as for the FORMAT= parameter of the WMS GetMap request. |
| WIDTH | Optional | This gives a hint for the width of the returned graphic in pixels. Vector-graphics can use this value as a hint for the level of detail to include. |
| HEIGHT | Optional | This gives a hint for the height of the returned graphic in pixels. |
| EXCEPTIONS | Optional | This gives the MIME type of the format in which to return exceptions. Allowed values are the same as for the EXCEPTIONS= parameter of the WMS GetMap request. |
| TRANSPARENT | Optional | true if the legend image background should be transparent. Defaults to false. |
