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<說明>
在本範例中,我們將示範如何執行圖面查詢,點擊圖面取得圖徵查詢結果,說明如下:
<範例>
var earth_ = null;
function documentLoad() { document.body.style.overflow = "hidden"; SuperGIS.Initialize("/ServerGate/", function () { SuperGIS.ServerEarth.Initialize(InitEarth); }); }
function InitEarth() { var pBody = new SuperGIS.Windows.HTMLContainer(document.getElementById("example"));
var sHost = location.href; var idx = sHost.indexOf("/", 8); if (idx >= 0) sHost = sHost.substring(0, idx); CreateHTML5Earth(pBody, function (pEarth) { EarthLoaded(pEarth); });
function EarthLoaded(pEarth) { earth_ = pEarth; pEarth.Scene.BackgroundColor = pEarth.CreateColor(0, 0, 0, 1); pEarth.SetupSystem(true, s_WGS84); pEarth.SetupSkin(pEarth.CreateEnvelope(-180, 180, -90, 90, s_WGS84), sHost + "/ServerGate/Skin1.jpg"); pEarth.MajorGraticule.Visible = false; pEarth.MinorGraticule.Visible = false;
// 指定向量磚服務的 WMTS 網址, 欲加入的圖層名稱, 及 callback function 名稱 VLayer = new SuperGIS.VectorLayer(getDataServicePath() + 'project_block/SimpleWMTS.aspx', pEarth, { layer: '土地使用分區' }, LanduseFinish);
pEarth.SetViewpoint(120.656, 24.160, 500, 0, 50, true);
var pTObj = pEarth.GetObject(); pTObj.addEventListener("mousedown", QueryAttribute, false, true); // 引入 mousedown 事件 }
// 在 callback 中設定每個 feature 的符號樣式 function LanduseFinish(array) { var rv = 128, gv = 255, bv = 128; for (var i = 0; i < array.length; i++) { var mark = array[i]; var fc = earth_.CreateColor(rv / 255.0, gv / 255.0, bv / 255.0, 128 / 255.0); mark.ReplaceZ = 0.5; // 設定高程 (公尺) mark.DDDSymbol = earth_.CreateSimpleDDDFillSymbol(earth_.CreateModelMaterial(0, fc), null); mark.Queryable = true; // 設定為可查詢 } }
function QueryAttribute(tEvent) {
if (tEvent.button == 2) // 使按右鍵無作用 return;
var pScene = earth_.GetScene(); var pCamera = earth_.GetCamera();
var CurPosition = pScene.PositionFromDevice(earth_.GetCurrentPosition()); var pPick = earth_.PlacemarkObjects.Picking(SuperGIS.DDDCore.RenderPriority.Unknown, pCamera.EyeAt, pCamera.Ray(CurPosition), 0); if (pPick != null) { var pm = pPick.Target; var feaData = pm.GetFieldValues(); var text = ""; for (f in feaData) { text += f + ": "; text += feaData[f] + "; "; } document.getElementById("result").innerHTML = text; } else document.getElementById("result").innerHTML = "無查詢結果"; } }
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