arcgis engine在地图上任意画两个多边形,分别实现两个多边形的交集代码
时间: 2024-04-22 19:22:07 浏览: 166
以下是实现两个多边形的交集代码,假设两个多边形分别为polygon1和polygon2:
```csharp
// 获取polygon1和polygon2的交集
IPolygon intersectPolygon = null;
ITopologicalOperator topoOperator1 = polygon1 as ITopologicalOperator;
ITopologicalOperator topoOperator2 = polygon2 as ITopologicalOperator;
intersectPolygon = topoOperator1.Intersect(topoOperator2, esriGeometryDimension.esriGeometry2Dimension) as IPolygon;
```
其中,`ITopologicalOperator` 接口是用于拓扑操作的,`Intersect` 方法可以获取两个几何对象的交集。`esriGeometryDimension.esriGeometry2Dimension` 表示在二维平面上进行操作。
希望这个代码能帮到你!
相关问题
arcgis engine在地图上任意画两个多边形,分别实现两个多边形的逻辑运算代码
好的,以下是基于 ArcGIS Engine 的代码示例,实现在地图上任意画两个多边形,并对它们进行逻辑运算:
```csharp
private IGeometry m_Polygon1 = null;
private IGeometry m_Polygon2 = null;
// 在地图上任意画两个多边形
private void DrawPolygons()
{
// 获取地图控件
IMapControl3 mapControl = axMapControl1.Object as IMapControl3;
// 创建绘制工具
ITool tool = new ControlsNewPolygonToolClass();
mapControl.CurrentTool = tool;
// 等待用户在地图上绘制第一个多边形
IGeometry geometry1 = null;
while (geometry1 == null)
{
Application.DoEvents();
geometry1 = mapControl.TrackNewPolygon();
}
// 等待用户在地图上绘制第二个多边形
IGeometry geometry2 = null;
while (geometry2 == null)
{
Application.DoEvents();
geometry2 = mapControl.TrackNewPolygon();
}
// 显示多边形
IElement element1 = new PolygonElementClass();
element1.Geometry = geometry1;
IElement element2 = new PolygonElementClass();
element2.Geometry = geometry2;
mapControl.ActiveView.GraphicsContainer.AddElement(element1, 0);
mapControl.ActiveView.GraphicsContainer.AddElement(element2, 0);
mapControl.ActiveView.Refresh();
// 保存多边形
m_Polygon1 = geometry1;
m_Polygon2 = geometry2;
}
// 计算两个多边形的交集
private void IntersectPolygons()
{
// 创建几何运算对象
IGeometryFactory3 geometryFactory = new GeometryEnvironmentClass();
IGeometryBag geometryBag = geometryFactory.CreateGeometryBag();
geometryBag.AddGeometry(m_Polygon1);
geometryBag.AddGeometry(m_Polygon2);
ITopologicalOperator3 topoOp = (ITopologicalOperator3)geometryBag;
// 计算两个多边形的交集
IGeometry intersection = topoOp.IntersectEx(m_Polygon1, esriGeometryDimension.esriGeometry2Dimension);
// 显示交集
IElement element = new PolygonElementClass();
element.Geometry = intersection;
IMapControl3 mapControl = axMapControl1.Object as IMapControl3;
mapControl.ActiveView.GraphicsContainer.AddElement(element, 0);
mapControl.ActiveView.Refresh();
}
// 计算两个多边形的并集
private void UnionPolygons()
{
// 创建几何运算对象
IGeometryFactory3 geometryFactory = new GeometryEnvironmentClass();
IGeometryBag geometryBag = geometryFactory.CreateGeometryBag();
geometryBag.AddGeometry(m_Polygon1);
geometryBag.AddGeometry(m_Polygon2);
ITopologicalOperator3 topoOp = (ITopologicalOperator3)geometryBag;
// 计算两个多边形的并集
IGeometry union = topoOp.Union(m_Polygon1, m_Polygon2);
// 显示并集
IElement element = new PolygonElementClass();
element.Geometry = union;
IMapControl3 mapControl = axMapControl1.Object as IMapControl3;
mapControl.ActiveView.GraphicsContainer.AddElement(element, 0);
mapControl.ActiveView.Refresh();
}
// 计算两个多边形的差集
private void DifferencePolygons()
{
// 创建几何运算对象
IGeometryFactory3 geometryFactory = new GeometryEnvironmentClass();
IGeometryBag geometryBag = geometryFactory.CreateGeometryBag();
geometryBag.AddGeometry(m_Polygon1);
geometryBag.AddGeometry(m_Polygon2);
ITopologicalOperator3 topoOp = (ITopologicalOperator3)geometryBag;
// 计算两个多边形的差集
IGeometry difference = topoOp.Difference(m_Polygon1, m_Polygon2);
// 显示差集
IElement element = new PolygonElementClass();
element.Geometry = difference;
IMapControl3 mapControl = axMapControl1.Object as IMapControl3;
mapControl.ActiveView.GraphicsContainer.AddElement(element, 0);
mapControl.ActiveView.Refresh();
}
// 计算两个多边形的对称差集
private void SymmetricDifferencePolygons()
{
// 创建几何运算对象
IGeometryFactory3 geometryFactory = new GeometryEnvironmentClass();
IGeometryBag geometryBag = geometryFactory.CreateGeometryBag();
geometryBag.AddGeometry(m_Polygon1);
geometryBag.AddGeometry(m_Polygon2);
ITopologicalOperator3 topoOp = (ITopologicalOperator3)geometryBag;
// 计算两个多边形的对称差集
IGeometry symmetricDifference = topoOp.SymmetricDifference(m_Polygon1, m_Polygon2);
// 显示对称差集
IElement element = new PolygonElementClass();
element.Geometry = symmetricDifference;
IMapControl3 mapControl = axMapControl1.Object as IMapControl3;
mapControl.ActiveView.GraphicsContainer.AddElement(element, 0);
mapControl.ActiveView.Refresh();
}
```
在这里,我们使用 ArcGIS Engine 的 `ControlsNewPolygonToolClass` 工具,让用户在地图上绘制两个多边形。然后,使用 `IGeometryBag` 将两个多边形的图形合并为一个几何对象,再使用 `ITopologicalOperator3` 提供的逻辑运算方法进行计算,最后将结果显示在地图上。
arcgis engine在地图上任意画两个多边形,分别实现两个多边形的逻辑运算(交集,并集,差集)代码
下面是利用 ArcObjects 实现 ArcGIS Engine 中对两个图形进行逻辑运算的示例代码:
```C#
// 获取要进行逻辑运算的两个多边形
IPolygon poly1 = ...; // 第一个多边形
IPolygon poly2 = ...; // 第二个多边形
// 创建一个拓扑运算器
ITopologicalOperator topoOp = poly1 as ITopologicalOperator;
// 计算两个多边形的交集
IGeometry intersection = topoOp.Intersect(poly2, esriGeometryDimension.esriGeometry2Dimension);
// 计算两个多边形的并集
IGeometry union = topoOp.Union(poly2);
// 计算两个多边形的差集(poly1 减去 poly2)
IGeometry difference = topoOp.Difference(poly2);
// 计算两个多边形的差集(poly2 减去 poly1)
ITopologicalOperator topoOp2 = poly2 as ITopologicalOperator;
IGeometry difference2 = topoOp2.Difference(poly1);
```
其中,`poly1` 和 `poly2` 分别代表两个多边形的几何对象。在代码中,首先使用 `poly1` 创建了一个拓扑运算器,然后分别调用了 `Intersect`、`Union` 和 `Difference` 方法来计算两个多边形的交集、并集和差集。由于差集是有顺序的,因此还需要分别计算 `poly1` 减去 `poly2` 和 `poly2` 减去 `poly1` 的差集。最终,`intersection`、`union`、`difference` 和 `difference2` 分别代表了两个多边形的逻辑运算结果。
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