三維立體圖徵

在三維立體空間中，資料也可以帶有高程數值，而從二維轉換而來的資訊並無高程資訊，因此在繪製時取其二維坐標，並伏貼於地表DTM上，這樣的呈現模式無法展現資料實際所在的高度與位置。利用三維立體圖徵相關功能，即可使線面圖徵資訊界尤其設定的高程值，正確繪製該圖徵在三維空間中的位置，並隨著圖台操作、視點改變，而呈現不同的形狀，營造出完全立體的視覺效果。

不論線圖徵或面圖徵，在建置時都是由三維點資料結構組成，三維點資料結構支援高程值紀錄，因此在XY坐標後，僅需加入高程值，即可在資料繪製成圖徵時顯示。這些圖徵於沒有設定高度值的圖徵一樣，可以設定框線、填色顏色、透明度、粗細等屬性，改變其視覺樣式。

function online3DClick()

{

var path = []; //建立路徑

path[0] = new TGOS.TEPoint(121.543794, 25.041626, 1000); //組成路徑的三維點資料

path[1] = new TGOS.TEPoint(121.543794, 25.041626, 3000);

path[2] = new TGOS.TEPoint(121.540794, 25.044626, 2500);

path[3] = new TGOS.TEPoint(121.546794, 25.044626, 2500);

path[4] = new TGOS.TEPoint(121.546794, 25.044626, 3500);

var lineStr = new TGOS.TELineString(path);

var testline3D = new TGOS.TELine(tg3dEarth,lineStr,{ //繪製線圖徵

strokeWeight:300,

strokeColor:'#ff3300',

AltitudeMode : TGOS.TEAltitudeModeType.RelativeToGround

});

TGOS.TEEvent.addListener(testline3D, "click", function (tEvent) {

alert('立體線圖徵');

});

}

function onfill3DClick()

{

var path = []; //建立路徑

path[0] = new TGOS.TEPoint(121.48633, 25.16105,2000); //組成路徑的三維點資料

path[1] = new TGOS.TEPoint(121.56735, 25.24617,5000);

path[2] = new TGOS.TEPoint(121.59070, 25.10386,3000);

path[3] = new TGOS.TEPoint(121.51585, 25.06469,5000);

path[4] = new TGOS.TEPoint(121.42453, 25.12718,4000);

path[5] = new TGOS.TEPoint(121.48633, 25.16105,2000);

var lineStr = new TGOS.TELineString(path);

var ring = new TGOS.TELinearRing(lineStr);

var polygon = new TGOS.TEPolygon([ring]);

var testFill = new TGOS.TEFill(tg3dEarth,polygon,{ //繪製面圖徵

fillColor:"#cccc00",

fillOpacity:0.6,

strokeColor:"#ffcc00",

strokeWeight:10000,

strokeOpacity:0.8,

AltitudeMode : TGOS.TEAltitudeModeType.Absolute

});

}