public string GetOverlapsClause(IGeometry geom)
{
string wkt = GeometryToWKT.Write(geom);
string retval = "Intersects(GeomFromText('" + wkt + "')," + _geometryColumn + ")=1";
return(retval);
}
/// <summary>
/// Returns the box filter string needed in SQL query
/// </summary>
/// <param name="bbox"></param>
/// <returns></returns>
private string GetBoxFilterStr(IEnvelope bbox)
{
ICoordinate ll = new Coordinate(bbox.MinX, bbox.MinY);
ICoordinate lr = new Coordinate(bbox.MaxX, bbox.MinY);
ICoordinate ur = new Coordinate(bbox.MaxX, bbox.MaxY);
ICoordinate ul = new Coordinate(bbox.MinX, bbox.MaxY);
LinearRing ring = new LinearRing(new[] { ll, lr, ur, ul, ll });
Polygon p = new Polygon(ring);
string bboxText = GeometryToWKT.Write(p);
string whereClause = String.Format(
"{0}{1}.STIntersects({4}::STGeomFromText('{2}', {3})) = 1",
this.GeometryColumn, this.MakeValidString, bboxText, this.SRID, this.spatialObject);
return(whereClause);
}
private string GetBoxClause(Envelope bbox)
{
if (UseSpatiaLiteIndex)
{
return(string.Format(Map.NumberFormatEnUs, _spatiaLiteIndexClause, bbox.MaxX, bbox.MinX, bbox.MaxY, bbox.MinY));
/*
* StringBuilder sql = new StringBuilder("ROWID IN ( ");
* sql.Append("SELECT pkid FROM ");
* sql.Append(SpatialIndex);
* sql.Append(" WHERE ");
* sql.AppendFormat(Map.NumberFormatEnUs,
* "xmin < {0} AND xmax > {1} AND ymin < {2} AND ymax > {3} )",
* bbox.Max.X, bbox.Min.X, bbox.Max.Y, bbox.Min.Y);
*
* return sql.ToString();
*/
}
string wkt = GeometryToWKT.Write(LineFromBbox(bbox));
return("MBRIntersects(GeomFromText('" + wkt + "')," + _geometryColumn + ")=1");
}
public string AsText()
{
return(GeometryToWKT.Write(this));
}
public new string AsText()
{
return(GeometryToWKT.Write(Envelope));
}
