我需要DotSpatial
中未完全包含的相交功能。如果我使用feature.Intersects()
,它会为我提供相交和包含的功能,当我使用feature.Contains()
时,它会为我提供刚才包含的功能。
我是这样手动完成的。
feature1.Intersects(feature2) && !feature1.Contains(feature2)
DotSpatial
有任何方法可以直接执行此操作吗?
答案 0 :(得分:2)
所以为了做到这一点,不必同时执行Intersects和" Not Contains"测试,你可以使用Touches。从您可以在此处找到的入门指南:Getting Started Guide触摸应该具有您想要的定义。请注意,在底部的示例中,即使考虑了所有的县,Placer县本身也不会出现在结果集中,但是它周围的每个县都会出现。
IFeatureSet counties;
IFeature placer;
private void Form1_Load(object sender, EventArgs e)
{
// Open a FeatureSet from a shapefile containing Counties
counties = Shapefile.Open("D:\\Data\\Counties\\CntyBnds_ESRI.shp");
// Loop through the features to find the Feature with the Name equal to "Placer"
foreach (IFeature f in counties.Features)
{
if (f.DataRow["NAME"].ToString() == "Placer")
{
placer = f;
break;
}
}
// Add the counties layer to the map to show all the counties
this.map1.Layers.Add(counties);
}
private void button1_Click(object sender, EventArgs e)
{
FeatureSet result = new FeatureSet();
// Cycle thorugh the shapes using the Touches operation
foreach (IFeature county in counties.Features)
{
if (county.Touches(placer))
{
// Add only the features that touch to the result dataset.
result.AddFeature(county);
}
}
// Add the result to the map.
this.map1.Layers.Add(result);
}