將地理座標轉換為 Well-Known Text 格式
輸入:25.037571 121.557846
結果:POINT (121.557846 25.037571)
輸入:25.037571 121.557846, 25.040000 121.560000
結果:MULTIPOINT ((121.557846 25.037571), (121.560000 25.040000))
輸入:25.037571 121.557846, 25.040000 121.560000, 25.042000 121.562000
結果:LINESTRING (121.557846 25.037571, 121.560000 25.040000, 121.562000 25.042000)
輸入:25.037571 121.557846, 25.040000 121.560000, 25.042000 121.562000, 25.037571 121.557846
結果:POLYGON ((121.557846 25.037571, 121.560000 25.040000, 121.562000 25.042000, 121.557846 25.037571))