Latest Contributions by LefterisKoumis

I used the gE to buffer a polygon but it seems that it ovelaps the whole polygon instead of only the buffer area. Measurement of the buffer area verifies that the area of the polygon itself is included in the buffer area calculation. How the buffer graphic can include only the buffer outside the polygon? I also tried the geometryEngine.difference to substract the polygon from the buffer polygon but I get spatialreference errors. Ideas? var polySym = new SimpleFillSymbol(SimpleFillSymbol.STYLE_DIAGONAL_CROSS,                 new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,                 new Color([255,0,0]), 2),new Color([255,255,0,0.25]));                                 var buffer = geometryEngine.geodesicBuffer(intersect_geom, thebufferdistance, "miles");     // added to see if difference could result to the buffer area      //     var newbuffer = geometryEngine.difference(buffer.geometry,intersect_area) var buffergraphic = new esri.Graphic(buffer, polySym);               bufferfeatures.push(buffergraphic) all(bufferfeatures).then(function (results) {                          for(j=0;j<results.length;j++){                 console.log(results[j])                 bufferGraphicsLayer.add(results[j]);               }           }) ------ ------ this.map.addLayer(bufferGraphicsLayer);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ... View more

I want to replicate the behavior of Arcmap analysis tools/overlay/intersect tool by using SPATIAL_REL_INTERSECTS. In that tool, when you specified two polygon classes, it doesn't matter the order, the area of intersection is the same. I want the users to be able to use any two polygon classes to run the intersect tool to get the intersected area. I am using the script below. If I switch the first layer with the second the results are different. Why? The intersected area should be the same regardless which layer is specified as first or second. Thanks. var firstgraphics = [];             var features = [];             array.forEach(firstlayer.graphics, function (feature) {               firstgraphics.push(feature.geometry)             })             var secondgraphics = [];             array.forEach(secondlayer.graphics, function (feature1) {               secondgraphics.push(feature1.geometry)             })                        var queryTask = new esri.tasks.QueryTask(firstlayer.url);             queryTask.on("error", this.queryTaskErrorHandler);             for (j = 0; j < secondgraphics.length; j++) {               query = new esri.tasks.Query();               query.geometry = secondgraphics[j];               query.returnGeometry = true;               query.where = "1=1";               query.maxAllowableOffset=0;               query.distance=0;               query.outFields = ["*"];               query.outSpatialReference = this.map.spatialReference;               query.spatialRelationship = esri.tasks.Query.SPATIAL_REL_INTERSECTS;               queryTask.execute(query, function (results) {                   for (i = 0; i < results.features.length; i++) {                     console.log(results.features[i].attributes);                    // thefeatureSet =  results.results;                     var graphic = new esri.Graphic(results.features[i].geometry, inter_symbol);                     bufferGraphicsLayer.add(graphic);                   }                 })               }                           this.map.addLayer(bufferGraphicsLayer);                        },‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ... View more

I tested the geometryEngine.intersect with two polygons. One has the purple boundary and the other one has the blue fill. So, when you run the intersect the red line shows the results. If the intersect was working properly, since the blue fill polygon is inside the purple polygon, the intersect (red line) should run along the the contour of the blue fill. It seems that it follows some vertices. This is an issue since the area of the intersect will be miscalculated. Ideas? Thanks. ... View more