arcgis engine計算點到線的最短距離

iproximityoperator介面用於獲取兩個幾何圖形的距離，以及給定乙個point，求另乙個幾何圖形上離離給定點最近的點。iproximityoperator介面的主要方法有：querynearespoint,returndistance, returnnearestpoint

returndistance方法用於返回兩個幾何物件間的最短距離，querynearespoint方法用於查詢獲取幾何物件上離給定輸入點的最近距離的點的引用，returnnearestpoint方法用於建立並返回幾何物件上離給定輸入點的最近距離的點

imap pmap = axmapcontrol1.map;

ilayer player = null;

ipoint po=null;

ipolyline pl=null;

ifeaturelayer featurelayer=null;

ifeatureclass featureclass = null;

igraphicscontainer gra;

ielement ptele;

ipointcollection lineptcol;

gra = axmapcontrol1.map as igraphicscontainer;

lineptcol = new polylineclass();

for (int i = 0; i < pmap.layercount; i++)

else

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}double dis = gettwogeometrydistance(po, pl);

ipoint po2 = nearestpoint(po, pl);

object a = type.missing;

lineptcol.addpoint(po, ref a, ref a);

lineptcol.addpoint(po2, ref a, ref a);

ielement lineele = new lineelementclass();

ipolyline pline = new polylineclass();

pline = lineptcol as ipolyline;

lineele.geometry = pline as igeometry;

gra.addelement(lineele, 0);

axmapcontrol1.refresh();

messagebox.show(dis.tostring());

計算幾何圖形之間的距離

public

double gettwogeometrydistance(igeometry pgeometrya, igeometry pgeometryb)

else

}離給定的幾何圖形最近的點

//離給定的幾何圖形最近的點

public ipoint nearestpoint(ipoint pinputpoint, igeometry pgeometry)

catch (exception err)

}計算出來最近的點，然後和初始的那個點連成乙個線，也就做出了直線的中垂線