gsvc.buffer(params, showBuffer) issue

ZhanGao — Thu, 18 Sep 2014 17:04:49 GMT

Hi,

I try do a buffer around selected one polygon, but no buffer shows up. here is some code if anyone can find out why. this is a html page.

function doBuffer(evt) {

var geometry = evt[0].geometry;

map = theMap;

symbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID,

new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID,

new dojo.Color([255, 0, 0]), 2), new dojo.Color([255, 255, 0, 0.25]));

var gsvc;

gsvc = new esri.tasks.GeometryService("https://xxx.com/arcgis/rest/services/Utilities/Geometry/GeometryServer");

switch (geometry.type) {

case "point":

//var symbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_SQUARE, 10, new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, new Color([255, 0, 0]), 1), new Color([0, 255, 0, 0.25]));

break;

case "polyline":

var symbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASH, new Color([255, 0, 0]), 1);

break;

case "polygon":

//var symbol = new esri.symbols.SimpleFillSymbol(SimpleFillSymbol.STYLE_NONE, new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT, new Color([255, 0, 0]), 2), new Color([255, 255, 0, 0.25]));

break;

}

//var graphic = new esri.Graphic(geometry, symbol);

//theMap.graphics.clear();

//setup the buffer parameters

var params = new esri.tasks.BufferParameters();

params.distances = 500;

params.bufferSpatialReference = new esri.SpatialReference({ wkid: 32612});

params.outSpatialReference = theMap.spatialReference;

params.unit =eval("esri.tasks.GeometryService.UNIT_FOOT");

//polygon = new esri.geometry.Polygon(theMap.spatialReference);

//polygon.addRing(theMap.graphics.graphics[0].geometry.rings);

// params.geometries = [evt[0].geometry];

// gsvc.buffer(params, showBuffer);

if (geometry.type === "polygon") {

//if geometry is a polygon then simplify polygon. This will make the user drawn polygon topologically correct.

gsvc.simplify([geometry], function (geometries) {

params.geometries = geometries;

gsvc.buffer(params, showBuffer);

});

} else {

params.geometries = [geometry];

gsvc.buffer(params, showBuffer);

}

function showBuffer(bufferedGeometries) {

symbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID,

new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID,

new dojo.Color([255, 0, 0]), 2), new dojo.Color([255, 255, 0, 0.25]));

dojo.forEach(bufferedGeometries, function(geometry) {

var graphic = new esri.Graphic(geometry, symbol);

theMap.graphics.add(graphic);

});

}

//end for buffer.

topic gsvc.buffer(params, showBuffer) issue in ArcGIS JavaScript Maps SDK Questions

gsvc.buffer(params, showBuffer) issue