Latest Contributions by FC_Basson

I'm running a GP task through the Leaflet-Esri API which returns polygon geometries.  I then union these geometries with the standard ArcGIS Server Geometry utilities through a L.esri.request process and the union result must then be used in a final Leaflet GP task process, which is asynchronous and using CORS to force a POST request.  The problem is that the final GP Task call does not "detect" the task result (a URL string to a JSON file), even though I can see it being returned in the browser XHR requests and the result is in the ArcGIS Server GP jobs folder.  The one issue that I've picked up is that after the Union task, the callback ID for the last GP task does not increment again and I suspect that the Leaflet API is trying to fetch some of the previous GP tasks' results.  Is there a way to "reset" the callback ID for the GP task results to ensure that the API is trying to fetch the correct GP task results.   Here is the code for the final GP task call: var gpServiceTest = L.esri.GP.service({ url: myGPserviceURL, path: "submitJob", async:true, asyncInterval:5, useCors:true }); var gpTaskTest = gpServiceTest.createTask(); gpTaskTest.setParam("Input_Polygon_String", rings); gpTaskTest.setOutputParam('JSON_Features'); gpTaskTest.run(function(error, response, raw) { loadjson(response.JSON_Features.url); });   I've found that when I take the polygon results from the Union task and run the final GP task as an isolated function with it before any of the other initial GP tasks, there is no callback function ID added to the task results request.  However if I run the final GP task after the initial GP task and Union, a callback function ID, similar to a previous GP task result request callback ID, is added to the result request and that is when the response from the final GP task results give an error. ... View more

I'm working on a geoprocessing tool to export my online web application's map graphics to any other format via ArcGIS Server.  I want to be able to send the geometries to the server and return a KML, Shapefile or whatever format I prefer.  Since there is no standard method in the API to convert geometries to other formats, I have created my own procedure. An example of the list of geometries being sent from the web app to the server look like this with Web Mercator coordinates: [    [[2097634.02,-4008451.29],[2097514.11,-4008426.54],[2097543.19,-4008329.14],[2097671.5,-4008357.4],[2097634.02,-4008451.29]],    ... ] The geometries list is built on the web app side with the following function: function exportGeometries(){   var exportGeoms = '[';   // each graphic feature geometry   for (g=0; g <= map.graphics.graphics.length - 1; g++){        exportGeoms += (g > 0 ? ',' : '');        rings = map.graphics.graphics .geometry.rings;        // each ring in the geometry        polyring = '[';        for (r=0; r <= rings.length - 1; r++){             ring = rings ;             // each point in the ring             for (pnt=0; pnt <= ring.length - 1; pnt++){                  polyring += (pnt > 0 ? ',' : '');                  polyring += '[' + ring[pnt][0] + ',' + ring[pnt][1] + ']';             }        }        polyring += ']';        exportGeoms += polyring;   }   exportGeoms += ']'; } The Python script tool on the server side needs to be able to read the list of geometries.  Just using arcpy.GetParameter() to read the list of geometries as a list object is not sufficient, because Python receives it as a unicode object. I've found a python module (ast) that converts the unicode object to a standard list object that can be iterated in Python with a for loop to create a new feature class that can be converted: import arcpy, ast geometries = arcpy.GetParameter(0) geomList = ast.literal_eval(geometries) sr = arcpy.SpatialReference(102100) newfc = arcpy.CreateFeatureclass_management(arcpy.env.scratchWorkspace, "webgeom", "POLYGON","","","",sr) cur = arcpy.da.InsertCursor(newfc, ("SHAPE@")) for polyring in geometries:    array = arcpy.Array()    for p in polyring:            array.add(arcpy.Point(p[0],p[1]))    polygon = arcpy.Polygon(array,sr)    cur.insertRow([polygon])   ) The new Feature Class can now be converted to any other format with the standard toolbox tools.  The Python script can be integrated into the final model or script that is published as a GP service that saves the converted object on the web server and returns a URL link as output. ... View more