GetFeatureInfo Requests

Yes

Request version number.

REQUEST=GetFeatureInfo

Yes

Request name.

Request GetFeatureInfo operation. The request name needs to be set to GetFeatureInfo ".

Yes

Get Map request parameter.

are not included. Determine the target map of the query, that is, on which map picture to query.

Yes

to be queried, separated by commas.

Yes

feature information.

Can be an application/vnd. Ogc. WMS _ XML. , application/geojson , text/xml , text/html。

No

to return information (default is 1).

With ( I , J ) as the center point, according to The request parameters BBOX, Width and Height in the GetMap operation determine the radius of the initial search range and search the specified query layer. If the result returned by the query is less than user-specified The number value will double the search radius and continue to search. If the number of query results meets the number of elements returned as required by the user, the results will be returned. Otherwise, the radius will continue to be expanded. When the search radius reaches 8 times of the initial search radius, the query is terminated, the query result is returned, and the query of the next layer is entered.

The query order of layers is consistent with the order in the layer list to be queried.

Yes

in pixels (0 on the leftmost side, increasing to the right).

Yes

The Y coordinate of the feature in pixels (0 on the topmost side, increasing downward).

No

As GetMap.

When querying with this parameter, it supports returning a response body in application/geojson format. The response body contains the LayerName, which is the title in the capability document obtained by the GetCapabilities operation.

Please note: This parameter and the layerDefs parameter must selected one, and can also be set at the same time and will take effect at the same time.

No

Attribute filtering, the syntax is  {<layer1>:<layerDefs1>,<layer2>:<layerDefs2>}, the filter conditions of different layers are separated by ','.

Among them, the value of <layer1>,<layer2> is the value of the layer attribute Name in the capability document; the supported comparison operations inclue =, <>, >, >=, <, <=; the supported string matching operations include BETWEEN AND, IN, like; the supported logical relationship judgement includes AND, OR, NOT. An example is as follows:

layerDefs={"0.11":"Shape_Area <500 and OBJECTID>100","0.12": "STATE_NAME LIKE‘N%'"}   

When querying with this parameter, it supports returning a response body in application/geojson format. The response body contains the LayerName.

Please note: This parameter and the layerDefs parameter must selected one, and can also be set at the same time and will take effect at the same time. This parameter only takes effect for vector layers.

No

Exception reporting format for WMS (default is application/vnd.ogc.se_xml).