合并部分的代码：
Func<List<GeoJSON.Net.Geometry.IGeometryObject>, ESRI.ArcGIS.Geometry.IGeometry> MergePolygon = (lsGeometry) =>
{
ESRI.ArcGIS.Geometry.IGeometryCollection pGeoCol = new ESRI.ArcGIS.Geometry.GeometryBagClass();
foreach (var aGeo in lsGeometry)
{
pGeoCol.AddGeometry(GeometryFactory.CreateEsriGeometryFromGeoJson(aGeo) as ESRI.ArcGIS.Geometry.IGeometry);
}
if (pGeoCol.GeometryCount == 0)
{
return null;
}
ESRI.ArcGIS.Geometry.ITopologicalOperator pTopo = new ESRI.ArcGIS.Geometry.PolygonClass() as ESRI.ArcGIS.Geometry.ITopologicalOperator;
pTopo.ConstructUnion(pGeoCol as ESRI.ArcGIS.Geometry.IEnumGeometry);
pTopo.Simplify();
return pTopo as ESRI.ArcGIS.Geometry.IGeometry;
}; Func<List<Ge
