ArcGIS 创建拓扑

/// <summary> /// 建立拓扑 /// </summary> /// <param name=”featureDataset”>目标数据集</param> /// <param name=”topologyName”>拓扑名称</param> 
public void CreateTopology(IFeatureDataset featureDataset, string topologyName) 
{ // 建立一个空拓扑（拓扑名称、获得数据集的XY容差作为拓扑容差） 
ITopologyContainer topologyContainer = (ITopologyContainer)featureDataset; 
ITopology topology = topologyContainer.CreateTopology(topologyName,
topologyContainer.DefaultClusterTolerance, -1, “”); 
// 获得“Roads”线状要素类加入到拓扑当中，拓扑等级为1 
IFeatureClassContainer featureclassContainer = (IFeatureClassContainer)featureDataset;
 IFeatureClass featureClass = featureclassContainer.get_ClassByName(“Roads”);
 topology.AddClass(featureClass, 5, 1, 1, false); // 建立一个拓扑规则（线丌重合） 
ItopologyRuleContainer topologyRuleContainer = (ITopologyRuleContainer)topology; 
ITopologyRule topologyRule = new TopologyRuleClass();
 topologyRule.TopologyRuleType = esriTopologyRuleType.esriTRTLineNoOverlap;
 topologyRule.OriginClassID = featureClass.ObjectClassID; 
topologyRule.AllOriginSubtypes = true; topologyRule.Name = “Roads No Overlap”; // 把建立好的拓扑规则添加到拓扑中 
if (topologyRuleContainer.get_CanAddRule(topologyRule)) 
{ topologyRuleContainer.AddRule(topologyRule); } 
// 验证拓扑 IGeoDataset geoDataset = (IGeoDataset)topology; 
//根据拓扑对象获得范围 IPolygon searchArea = new PolygonClass(); 
ISegmentCollection segmentCollection = (ISegmentCollection)searchArea; 
segmentCollection.SetRectangle(geoDataset.Extent); // 获得整个拓扑中的“脏区” 
IPolygon dirtyArea = topology.get_DirtyArea(searchArea); // 验证“脏区” 
IEnvelope dirtyAreaEnvelope = dirtyArea.Envelope; topology.ValidateTopology(dirtyAreaEnvelope);

转载自：https://blog.csdn.net/chanyinhelv/article/details/8508288