Headings defined in a map service published to ArcGIS Server are correctly reflected in the service’s JSON configuration but do not appear in the results when performing a legend query (e.g.: MapServer/legend) through the Feature Service REST API.

解决办法

Perform a QueryLegend operation on a map service to return information about the map service's legend by layer, refer to this documentation: https://developers.arcgis.com/rest/services-reference/enterprise/query-legends-map-service/ for more information.

重现步骤