In SuperMap iServer distributed analysis service, it provides buffer analysis function for massive data. This article describes how to use iClient to dock buffer analysis in distributed analysis services.

I. Development preparation

1. iServe Opens Distributed Analysis Service, Reference Blog https://blog.csdn.net/supermapsupport/article/details/90903095
2. iClient development kit, through iClient Product Official Website Downloading

2. Distributed Analysis Buffer Analysis Job on iServer

On iServer, the analysis can be done through a graphical interface, and the results can be previewed to test whether the analysis results are the desired results.
1. Firstly, buffer analysis buffers under spatial analysis are found in distributed analysis services.

2. Create an analysis job and fill in the corresponding parameters.

3. After execution, you can preview the results of the analysis in iServer

iClient docking buffer analysis

We provide a number of GIS front-end development frameworks, in this case iClient for Classic docking.

1. Introducing files and services and creating containers

<script type="text/javascript" src="../../dist/classic/include-classic.js"></script>
<script type="text/javascript">
        var resultLayer,
            processingsUrl = "http://localhost:8090/iserver/services/distributedanalyst/rest/v1/jobs",
            mapURL ="http://localhost:8090/iserver/services/map-world/rest/maps/World",
            map = new SuperMap.Map("map", {
                controls: [
                    new SuperMap.Control.Navigation(),
                    new SuperMap.Control.Zoom(),
                    new SuperMap.Control.LayerSwitcher()

                ],
                allOverlays: true
            });           

2. Registration key

 SuperMap.SecurityManager.registerToken(processingsUrl, "XEYE-4vTLNnss6Ryd0xGzZL1La8iTw7jpaKRAE5GYEsGDM8fJD3_OsZW4yu2ZtiL9tMkQEAL3tyApDHAlz1GYw..");

3. Setting Analytical Parameters

 var buffersAnalystJobsParameter = new SuperMap.BuffersAnalystJobsParameter({
                datasetName: $('#datasetName').val(),//Analytical Data Set
                bounds: getBounds(),                 //Scope of analysis
                distance: $('#distace').val(),      //Buffer distance
                distanceField: $('#distanceField').val(),//Buffer distance field
                distanceUnit: $('#distanceUnit option:selected').attr('value'),//Buffer distance unit
                dissolveField: $('#dissoveField').val()                //Fusion field
            });
            

4. Executing tasks and displaying maps

     processingService.addBuffersJob(buffersAnalystJobsParameter, function (serviceResult) {
              if (serviceResult.error) {
                  widgets.loader.removeLoader();
                  var errorMsg = serviceResult.error.errorMsg || "code: " + serviceResult.error.code;
                  widgets.alert.showAlert(resources.msg_createFailed + "<br>" + errorMsg, false);
                  return;
              }
              serviceResult.result.setting.serviceInfo.targetServiceInfos.map(function (info) {
                  if (info.serviceType === 'RESTMAP') {
                      SuperMap.FetchRequest.get(info.serviceAddress + '/maps').then(function (
                          response) {
                          return response.json();
                      }).then(function (result) {
                          var mapUrl = result[0].path;
                          resultLayer = new SuperMap.Layer.TiledDynamicRESTLayer(
                              "resultLayer", mapUrl, {
                                  transparent: true
                              });
                          resultLayer.events.on({
                              "layerInitialized": addLayer
                          });

                          function addLayer() {
                              map.addLayer(resultLayer);
                              widgets.loader.removeLoader();
                          }
                      });
                  }
              });
          });

5. Display results

The complete code is as follows:
iClient for Classic:
http://iclient.supermap.io/examples/classic/editor.html#buffersAnalystJobService
iClient for Leaflet:
http://iclient.supermap.io/examples/leaflet/editor.html#buffersAnalystJobService
iClient for Openlayers:
http://iclient.supermap.io/examples/openlayers/editor.html#buffersAnalystJobService