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본질적으로 이전 쿼리에서 반환 된 결과 집합에 대해 두 번째 공간 쿼리를 수행하려고합니다. 원본이 실행되지만 두 번째 for 루프에 floodCalcs.businessF에 대한 결과가 반환되지 않습니다. 나는 이것으로부터 어떤 오류도 얻지 않으며 폴리곤이 다각형 (이것은 전역 변수 임)에로드되었는지 확인합니다.ArcGIS JS의 기능/폴리곤을 사용하는 서브 쿼리
queryShapes = function() {
for (var v = 0; v < shapes.length; v++) {
query = new Query();
select = shapes[v];
query.geometry = shapes[v].getExtent();
query.returnGeometry = true;
businessLayer.queryFeatures(query, selectBusiness);
//featureLayer.queryFeatures(query, selectInBuffer);
//perform query on business layer using user drawn shape's bounding box (extent)
function selectBusiness(response) {
var feature;
var features = response.features;
var floodFeatures = [];
var floodFeature;
var inBuffer = [];
var floodBuffer = [];
var q = new Query();
q.geometry = shapes[v].getExtent();
q.where = "1=1";
q.outSpatialReference = map.spatialReference;
q.outFields = ["*"];
q.returnGeometry = true;
var qTask = new QueryTask("ommitted URL");
qTask.execute(q);
qTask.on("complete", queryBlock);
//query flood layer using user drawn shapes and cast the returned features as polygons
function queryBlock(f) {
for (var i = 0; i < f.featureSet.features.length; i++) {
polygons.push(new Polygon({ "rings": f.featureSet.features[i].geometry.rings, "spatialReference": f.featureSet.features[i].geometry.spatialReference }));
}
}
//filter out features that are not actually in buffer, since we got all points in the buffer's bounding box
for (var c = 0; c < features.length; c++) {
feature = features[c];
if (shapes[v].contains(feature.geometry)) {
inBuffer.push(feature.attributes[businessLayer.objectIdField]);
}
//use flood polygons that were returned in queryBlock function to find points in flood zones
for (var b = 0; b < polygons.length; b++) {
var poly = polygons[b];
if (poly.contains(feature.geometry)) {
floodCalcs.businessF += 1;
}
}
}
var subQuery = new Query();
subQuery.objectIds = inBuffer;
//use a fast objectIds selection query (should not need to go to the server)
featureLayer.selectFeatures(subQuery, FeatureLayer.SELECTION_NEW, function (results) {
floodCalcs.business += sumPopulation(results);
});
}
function sumPopulation(features) {
var popTotal = 0;
popTotal = features.length;
return popTotal;
}
}
}