1米应该用什么值来表示?我使用GeometryFactorySRID 为 4326 的 来创建点和多边形。我正在使用的代码大致如下:GeometryFactory Geography = NtsGeometryServices.Instance.CreateGeometryFactory(4326); var point = Geography.CreatePoint(coordinate.Latitude, coordinate.Longitude); var polygonCoordinates = point.Buffer(1...
目前,我循环遍历所有多边形,并将它们转换为SqlGeometry对象,并通过调用multiPolygon = multiPolygon.STUnion(nextGeometry);创建多个多边形来合并这些对象,然后可以将其转换为DbGeography并保存。这方面有两个问题: 保存的多边形在它们重叠的地方合并。不是世界末日,但不是理想。 当我将形状转换回GeoJson并将其添加到地图...
在sql "geometry_column::geography".中,我可以通过使用sql查询“geometry_column::geography”.中的以下语法将几何列转换为地理,从而获得以米为单位的距离。就像这样: select * from "Tags" where ST_Distance("Location",'POINT(31.233334 30.033333)'::geography) < 1000 ; 现在,我想将、tag.Location、和点转换...
I have a string stored in Sql server with DataType Geography: "0xE61000000104040000005C8FC2F5280C54C0A01A2FDD24C639409CC420B0723050C00C022B8716294040643BDF4F8D8750C09EEFA7C64B7732405C8FC2F5280C54C0A01A2FDD24C6394001000000020000000001000000FFFFFFFF0000000003" I need to convert it in NTS Geometry....
NetTopologySuite IO project to read and write geometry in Tiny Well-Known-Binary fromat ntsnettopologysuitents-io UpdatedApr 3, 2020 C# steepl/Blaeu.NET Star4 Code Issues Pull requests Discussions A .NET Core GIS solution for creating and storing GeoJSON using EF Core, NetTopologySuite and ...
I could convert the stored Location from geography to geometry, but the problem is that the application uses distance queries. The latter is the correct distance in meters. The first is something else, maybe degrees? It is a easy way that change the poly switches x y to y x , or anyway...
/* Include modules to your migration db context */ builder.HasPostgresExtension("postgis"); builder.Entity<Station>().Property(b => b.Location).HasColumnType("geography"); ... } public override void ConfigureServices(ServiceConfigurationContext context) { var dataSourceBuilder = new Npgs...
//var currentLocation = geometryFactory.CreatePoint(new Coordinate(13.003725d, 55.604870d)); //testFacility.Location = currentLocation; db.Facilities.Add(testFacility); //Exception on Save db.SaveChanges(); I'm using the following NuGets, version3.1.0 ...
select*from sys.spatial_reference_systems where spatial_reference_id='4326'
EntityFrameworkCore IndexOutOfRangeException when saving geometry using NetTopologySuite dotnet/efcore#18813 Closed UDT parameters are limited to 64K dotnet/SqlClient#329 Closed Author juliusfriedman commented Feb 20, 2020 It seems this has something to do with the length of the LineString I...