/// <summary>
/// Returns geometry Object IDs whose bounding box intersects 'bbox'
/// </summary>
/// <param name="bbox"></param>
/// <returns></returns>
public Collection <uint> GetObjectIDsInView(SharpMap.Geometries.BoundingBox bbox)
{
_OgrLayer.SetSpatialFilterRect(bbox.Min.X, bbox.Min.Y, bbox.Max.X, bbox.Max.Y);
OGR.Feature _OgrFeature = null;
_OgrLayer.ResetReading();
Collection <uint> _ObjectIDs = new Collection <uint>();
while ((_OgrFeature = _OgrLayer.GetNextFeature()) != null)
{
_ObjectIDs.Add((uint)_OgrFeature.GetFID());
_OgrFeature.Dispose();
}
return(_ObjectIDs);
}
/// <summary>
/// Returns geometries within the specified bounding box
/// </summary>
/// <param name="bbox"></param>
/// <returns></returns>
public Collection <SharpMap.Geometries.Geometry> GetGeometriesInView(SharpMap.Geometries.BoundingBox bbox)
{
Collection <SharpMap.Geometries.Geometry> geoms = new Collection <SharpMap.Geometries.Geometry>();
_OgrLayer.SetSpatialFilterRect(bbox.Left, bbox.Bottom, bbox.Right, bbox.Top);
OGR.Feature _OgrFeature = null;
_OgrLayer.ResetReading();
while ((_OgrFeature = _OgrLayer.GetNextFeature()) != null)
{
geoms.Add(this.ParseOgrGeometry(_OgrFeature.GetGeometryRef()));
_OgrFeature.Dispose();
}
return(geoms);
}
/// <summary>
/// Returns the geometry corresponding to the Object ID
/// </summary>
/// <param name="oid">Object ID</param>
/// <returns>geometry</returns>
public SharpMap.Geometries.Geometry GetGeometryByID(uint oid)
{
using (OGR.Feature _OgrFeature = _OgrLayer.GetFeature((int)oid))
return(this.ParseOgrGeometry(_OgrFeature.GetGeometryRef()));
}