public void TestST3DLength()
        {
            using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
            {
                var geom1 = db.Select(() => GeometryInput.STGeomFromText("LINESTRING(743238 2967416 1,743238 2967450 1,743265 2967450 3,743265.625 2967416 3, 743238 2967416 3)", 2249));

                var length1 = db.Select(() => MeasurementFunctions.ST3DLength(geom1));
                Assert.AreEqual(122.704716741457, length1, 1.0E-9);

                Assert.IsNull(db.Select(() => MeasurementFunctions.ST3DLength(null)));
            }
        }