I am calculating the total length of poly-lines (pipes) within a polygon. I am querying the layer and I am getting the result. The problem is that when I'm comparing the results with ArcMap I have some difference in the length. My code is:featureLayer.on("click", function (evt) {
map.graphics.clear();
var highlightGraphic = new Graphic(evt.graphic.geometry, highlightSymbol);
map.graphics.add(highlightGraphic);
var query = new Query();
var queryTask = new QueryTask("feature layer with polylines");
query.geometry = evt.graphic.geometry;
query.returnGeometry = true;
query.outSpatialReference = map.spatialReference;
query.outFields = ["*"];
queryTask.execute(query, function (results) {
var lengthParams = new LengthsParameters();
var pipesList = [];
for (var i = 0; i < results.features.length; i++) {
pipesList.push(results.features.geometry);
}
lengthParams.polylines = pipesList;
lengthParams.lengthUnit = GeometryService.UNIT_KILOMETER;
geometryService.lengths(lengthParams);
});
dojo.connect(geometryService, "onLengthsComplete", outputDistance);
function outputDistance(result) {
var total = 0;
for (var i = 0; i < result.lengths.length; i++) {
total += result.lengths;
}
alert("Count: " + result.lengths.length + " Distance: " + total.toFixed(2) + "km");
}
Am I doing something wrong with my code? Thanks
