ArcEngine 实现 SurfaceAnalysis的Area/Volumn功能
/// <summary> /// 从目录加载Tin /// Esri的TIN,是一个文件夹,下面包好8个名称固定的adf文件 /// </summary> /// <param name="folder">TinDataSet的父目录</param> /// <param name="tinDataset">tinDataSet的名称</param> /// <returns></returns> public ITin GetTinLayer(string folder, string tinDataset) { IWorkspaceFactory pWSFact = new TinWorkspaceFactoryClass(); IWorkspace pWS = pWSFact.OpenFromFile(folder, 0); ITinWorkspace pTinWS = pWS as ITinWorkspace; ITin pTin = pTinWS.OpenTin(tinDataset); return pTin; }
li_TinDataset = new List<string> { "tdenv.adf", "tedg.adf", "thul.adf", "tmsk.adf", "tmsx.adf", "tnod.adf", "tnxy.adf", "tnz.adf" };
/// <summary> /// 检查是否是TIN dataset /// </summary> /// <param name="folderpath">用户选择的folder</param> /// <returns></returns> public bool CheckTinDataSet(string folderpath) { if (!Directory.Exists(folderpath)) return false; DirectoryInfo di = new DirectoryInfo(folderpath); FileInfo[] ar_fi= di.GetFiles("*.adf"); List<string> li_tem=new List<string>(); for (int i = 0; i <= ar_fi.Length - 1; i++) { li_tem.Add(ar_fi[i].Name); } int afirmed = 0; for (int i = 0; i <= li_TinDataset.Count - 1; i++) { if (li_tem.Contains(li_TinDataset[i])) afirmed++; else break; } if (afirmed == 8) return true; else return false; }
/// <summary> /// 将整个TIN作为计算对象,使用此方法 /// </summary> /// <param name="Tin">TinLayer</param> /// <param name="planeheight">参考面高度</param> public void CalculateAreaVolumeISurface(ITin Tin, double planeheight,esriPlaneReferenceType aboveOrBelow,out double projectedArea,out double surfaceArea,out double volume) { ISurface pSurface = Tin as ISurface; projectedArea = pSurface.GetProjectedArea(planeheight, aboveOrBelow); surfaceArea = pSurface.GetSurfaceArea(planeheight, aboveOrBelow); volume = pSurface.GetVolume(planeheight, aboveOrBelow); projectedArea = Math.Round(projectedArea, 2);//保留两位小数 surfaceArea = Math.Round(surfaceArea, 2); volume = Math.Round(volume, 2); }