public void TestSTPerimeter()
{
using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
{
const string Ewkt1 = "SRID=2249;POLYGON((743238 2967416,743238 2967450,743265 2967450, 743265.625 2967416,743238 2967416))";
db.TestGeometries
.Value(g => g.Id, 1)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromEWKT(Ewkt1))
.Insert();
const string Ewkt2 = @"SRID=2249;
MULTIPOLYGON(((763104.471273676 2949418.44119003,
763104.477769673 2949418.42538203,
763104.189609677 2949418.22343004,763104.471273676 2949418.44119003)),
((763104.471273676 2949418.44119003,763095.804579742 2949436.33850239,
763086.132105649 2949451.46730207,763078.452329651 2949462.11549407,
763075.354136904 2949466.17407812,763064.362142565 2949477.64291974,
763059.953961626 2949481.28983009,762994.637609571 2949532.04103014,
762990.568508415 2949535.06640477,762986.710889563 2949539.61421415,
763117.237897679 2949709.50493431,763235.236617789 2949617.95619822,
763287.718121842 2949562.20592617,763111.553321674 2949423.91664605,
763104.471273676 2949418.44119003)))";
db.TestGeometries
.Value(g => g.Id, 2)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromEWKT(Ewkt2))
.Insert();
const string Ewkt3 = "SRID=2249;POINT(0 0)";
db.TestGeometries
.Value(g => g.Id, 3)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromEWKT(Ewkt3))
.Insert();
db.TestGeometries
.Value(g => g.Id, 4)
.Value(g => g.Geometry, () => null)
.Insert();
Assert.AreEqual(122.630744000095, db.TestGeometries.Where(g => g.Id == 1).Select(g => g.Geometry.STPerimeter()).Single().Value, 0.000000000001);
Assert.AreEqual(122.630744000095, db.TestGeometries.Where(g => g.Id == 1).Select(g => g.Geometry.STPerimeter2D()).Single().Value, 0.000000000001);
Assert.AreEqual(845.227713366825, db.TestGeometries.Where(g => g.Id == 2).Select(g => g.Geometry.STPerimeter()).Single().Value, 0.000000000001);
Assert.AreEqual(845.227713366825, db.TestGeometries.Where(g => g.Id == 2).Select(g => g.Geometry.STPerimeter2D()).Single().Value, 0.000000000001);
Assert.AreEqual(0.0, db.TestGeometries.Where(g => g.Id == 3).Select(g => g.Geometry.STPerimeter()).Single());
Assert.IsNull(db.TestGeometries.Where(g => g.Id == 4).Select(g => g.Geometry.STPerimeter()).Single());
Assert.IsNull(db.TestGeometries.Where(g => g.Id == 4).Select(g => g.Geometry.STPerimeter2D()).Single());
Assert.AreEqual(122.630744000095, db.Select(() => MeasurementFunctions.STPerimeter2D(Ewkt1)).Value, 0.000000000001);
var PolygonGeographyWkt = "POLYGON((-71.1776848522251 42.3902896512902,-71.1776843766326 42.3903829478009, -71.1775844305465 42.3903826677917,-71.1775825927231 42.3902893647987,-71.1776848522251 42.3902896512902))";
db.TestGeographies
.Value(g => g.Id, 1)
.Value(g => g.Geography, () => GeometryInput.STGeographyFromText(PolygonGeographyWkt))
.Insert();
var perimeterGeography = db.TestGeographies
.Where(g => g.Id == 1)
.Select(g => g.Geography.STPerimeter())
.Single();
Assert.AreEqual(37.379046, perimeterGeography.Value, 1.0E-6);
}
}
public void TestSTAsGeoJSON()
{
using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
{
const string Wkt1 = "POINT(2.48 4.75)";
db.TestGeometries
.Value(g => g.Id, 1)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromText(Wkt1))
.Insert();
var geojson1 = db.TestGeometries
.Where(g => g.Id == 1)
.Select(g => g.Geometry.STAsGeoJSON())
.Single();
Assert.AreEqual("{\"type\":\"Point\",\"coordinates\":[2.48,4.75]}", geojson1);
var geojson1crs = db.TestGeometries
.Where(g => g.Id == 1)
.Select(g => g.Geometry.STAsGeoJSON(1, 4))
.Single();
Assert.AreEqual("{\"type\":\"Point\",\"coordinates\":[2.5,4.8]}", geojson1crs);
const string Wkt2 = "LINESTRING(1 2 3, 4 5 6)";
db.TestGeometries.Value(g => g.Id, 2).Value(g => g.Geometry, () => GeometryInput.STGeomFromText(Wkt2)).Insert();
var geojson2 = db.TestGeometries
.Where(g => g.Id == 2)
.Select(g => g.Geometry.STAsGeoJSON())
.Single();
Assert.AreEqual("{\"type\":\"LineString\",\"coordinates\":[[1,2,3],[4,5,6]]}", geojson2);
const string Ewkt3 = "SRID=3857;POINT(2.48 4.75)";
db.TestGeometries
.Value(g => g.Id, 3)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromEWKT(Ewkt3))
.Insert();
var geojson3 = db.TestGeometries
.Where(g => g.Id == 3)
.Select(g => g.Geometry.STAsGeoJSON())
.Single();
if (this.CurrentVersion >= new Version("3.0.0"))
{
Assert.AreEqual(
"{\"type\":\"Point\",\"crs\":{\"type\":\"name\",\"properties\":{\"name\":\"EPSG:3857\"}},\"coordinates\":[2.48,4.75]}",
geojson3);
}
else
{
Assert.AreEqual(
"{\"type\":\"Point\",\"coordinates\":[2.48,4.75]}",
geojson3);
}
var geojson3crs = db.TestGeometries
.Where(g => g.Id == 3)
.Select(g => g.Geometry.STAsGeoJSON(1, 4))
.Single();
Assert.AreEqual("{\"type\":\"Point\",\"crs\":{\"type\":\"name\",\"properties\":{\"name\":\"urn:ogc:def:crs:EPSG::3857\"}},\"coordinates\":[2.5,4.8]}", geojson3crs);
Assert.IsNull(db.Select(() => GeometryOutput.STAsGeoJSON(null)));
db.TestGeographies
.Value(g => g.Id, 1)
.Value(g => g.Geography, () => GeometryInput.STGeographyFromText("POINT(30 60)"))
.Insert();
var geojson4 = db.TestGeographies
.Where(g => g.Id == 1)
.Select(g => g.Geography.STAsGeoJSON())
.Single();
Assert.AreEqual(
"{\"type\":\"Point\",\"coordinates\":[30,60]}",
geojson4);
var pointGeography = new NTSGS.Point(-43.23456, 72.4567772)
{
SRID = SRID4326
};
db.Insert(new TestGeographyEntity(2, pointGeography));
var geojson5 = db.TestGeographies
.Where(g => g.Id == 2)
.Select(g => g.Geography.STAsGeoJSON(3))
.Single();
Assert.AreEqual(
"{\"type\":\"Point\",\"coordinates\":[-43.235,72.457]}",
geojson5);
}
}
public void TestSTLength()
{
using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
{
const string Ewkt1 = "SRID=2249;LINESTRING(743238 2967416,743238 2967450,743265 2967450, 743265.625 2967416,743238 2967416)";
db.TestGeometries
.Value(g => g.Id, 1)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromEWKT(Ewkt1))
.Insert();
const string Ewkt2 = "SRID=2249;POINT(0 0)";
db.TestGeometries
.Value(g => g.Id, 2)
.Value(g => g.Geometry, () => GeometryInput.STGeomFromEWKT(Ewkt2))
.Insert();
db.TestGeometries
.Value(g => g.Id, 3)
.Value(g => g.Geometry, () => null)
.Insert();
var length1 = db.TestGeometries
.Where(g => g.Id == 1)
.Select(g => g.Geometry.STLength())
.Single();
Assert.AreEqual(122.630744000095, length1.Value, 0.000000000001);
var length2 = db.TestGeometries
.Where(g => g.Id == 1)
.Select(g => g.Geometry.STLength2D())
.Single();
Assert.AreEqual(122.630744000095, length2.Value, 0.000000000001);
Assert.AreEqual(0.0,
db.TestGeometries
.Where(g => g.Id == 2)
.Select(g => g.Geometry.STLength())
.Single());
Assert.IsNull(
db.TestGeometries.Where(g => g.Id == 3)
.Select(g => g.Geometry.STLength())
.Single());
Assert.AreEqual(
122.630744000095,
db.Select(() => MeasurementFunctions.STLength(Ewkt1)).Value,
0.000000000001);
Assert.AreEqual(
122.630744000095,
db.Select(() => MeasurementFunctions.STLength2D(Ewkt1)).Value,
0.000000000001);
Assert.IsNull(db.Select(() => MeasurementFunctions.STLength((NTSG)null)));
var PolygonGeographyWkt = "SRID=4326;LINESTRING(-72.1260 42.45, -72.1240 42.45666, -72.123 42.1546)";
db.TestGeographies
.Value(g => g.Id, 1)
.Value(g => g.Geography, () => GeometryInput.STGeographyFromText(PolygonGeographyWkt))
.Insert();
var perimeter1 = db.TestGeographies
.Where(g => g.Id == 1)
.Select(g => g.Geography.STLength())
.Single();
Assert.AreEqual(34310.57036, perimeter1.Value, 1.0E-5);
var perimeter2 = db.TestGeographies
.Where(g => g.Id == 1)
.Select(g => g.Geography.STLength(false))
.Single();
Assert.AreEqual(34346.20609, perimeter2.Value, 1.0E-5);
}
}