.NET spatial query REST SOE

This sample illustrates how to develop a REST server object extension (SOE) with a spatial query operation. The spatial query operation returns all the features of a map service layer that fall within the user-defined search distance of a location point. The location point and the search distance are the input parameters of the REST operation, which generate a search buffered area. This SOE will return the features that are within the buffered area and also a summary of the total areas by those features' vegetation types. At last, a JavaScript client application is provided with this sample to demonstrate how to consume this SOE's spatial query operation.

NetSpatialQuery0

Features

  • Spatial Query
  • Conversion.ToGeometry()
  • ISpatialFilter
  • ITopologicalOperator
  • Default SOE properties

Sample data

This sample uses the Veg map service as the sample service to test with the SOE.

Instructions

Deploy the SOE

  1. Log in to ArcGIS Server Manager and click the Site tab.
  2. Click Extensions.
  3. Click Add Extension.
  4. Click Choose File and choose the SpatialQueryREST_ent.soe file (..\bin\Release\SpatialQueryREST_ent.soe or ..\bin\Debug\SpatialQueryREST_ent.soe).
  5. Click Add.

Enable the SOE on a map service

  1. Make sure you have published the Veg map service using ArcGIS Pro. If not, refer to veg map service.
  2. Log in to ArcGIS Server Manager and click the Services tab. Select the Veg map service and select Capabilities.
  3. In the list of available capabilities, find .Net Spatial Query REST SOE and check the box to enable it.
  4. Keep the SOE selected to check the SOE's properties. Leave them as their default values.

    NetSpatialQuery1

  5. Click the Save and Restart button to restart the service.

Test the SOE in the ArcGIS Server Services Directory

  1. Open a browser and navigate to the REST services endpoint of the USA map service (URL: http://<serverdomain>/<webadaptorname>/rest/services/Veg/MapServer).
  2. Scroll to the bottom of the above page. Click SpatialQueryREST in Supported Extensions.
  3. Click SpatialQuery at Supported Operations, which leads to the following URL:

    http://<serverdomain>/<webadaptorname>/rest/services/Veg/MapServer/exts/SpatialQueryREST/SpatialQuery
    
  4. In location box, paste the following text: {"x":548866.0975094471, "y":4920138.946296035, "spatialReference":26712}
  5. In distance box, paste the following test: 5000
  6. Click the SpatialQuery(Get) button. You should be able to see a valid result:

    NetSpatialQuery2

Test the SOE in a JavaScript REST application

  1. Open the SpatialQueryClient.html file in an editor.
  2. Modify soeURL at Ln 51 and serviceURL at Ln 52 to reflect your own service.
  3. Save the code and deploy this JavaScript application.
  4. Open this application on a browser and click on the map.
  5. You should be able to see the clipped features on the map and a summary table showing the vegetation type and total area as the following:

    NetSpatialQuery0

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