SQL服务器地理纬度经度错误

Question

我正在使用地理数据类型来计算最短距离。

CREATE TABLE Landmark (
    Id int,   
    Latitude FLOAT,
    Longitude FLOAT
)

INSERT Landmark VALUES
(1, 49.242458, -123.153465),
(2, 49.249381, -122.866683)

WITH GeographyLandmark AS
(
    SELECT Id, geography::STPointFromText('POINT(' + CAST(Latitude AS VARCHAR(20)) + ' ' + CAST(Longitude AS VARCHAR(20)) + ')', 4326) Location
    FROM Landmark
)

--this query calculates distance between point and localizations in meters
SELECT Id, geography::STPointFromText('POINT(' + CAST(49.2424566 AS VARCHAR(20)) + ' ' + CAST(-123.1534623 AS VARCHAR(20)) + ')', 4326).STDistance(Location) Distance
FROM GeographyLandmark

但是我收到这个错误：

A .NET Framework error occurred during execution of user-defined routine or aggregate "geography": System.FormatException: 24201: Latitude values must be between -90 and 90 degrees. System.FormatException: at Microsoft.SqlServer.Types.GeographyValidator.ValidatePoint(Double x, Double y, Nullable1 z, Nullable1 m) at Microsoft.SqlServer.Types.Validator.BeginFigure(Double x, Double y, Nullable1 z, Nullable1 m) at Microsoft.SqlServer.Types.ForwardingGeoDataSink.BeginFigure(Double x, Double y, Nullable1 z, Nullable1 m) at Microsoft.SqlServer.Types.CoordinateReversingGeoDataSink.BeginFigure(Double x, Double y, Nullable1 z, Nullable1 m) at Microsoft.SqlServer.Types.WellKnownTextReader.ParsePointText(Boolean parseParentheses) at Microsoft.SqlServer.Types.WellKnownTextReader.ParseTaggedText(OpenGisType type) at Microsoft.SqlServer.Types.WellKnownTextReader.Read(OpenGisType type, Int32 srid) at Microsoft.SqlServer.Types.SqlGeography.ParseText(OpenGisType type, SqlChars taggedText, Int32 srid) at Microsoft.SqlServer.Types.SqlGeography.GeographyFromText(OpenGisType type, SqlChars taggedText, Int32 srid) .

这里有什么问题？

Answer 1

您似乎调换了纬度和经度。几件事：

一个简单的完整性检查是使用 Lat and/or Long 扩展属性。这是 Long 的 doc。
Microsoft 实现提供的另一个扩展是Point 创建点的静态方法。因此，您不必为要传递给 STPointFromText 的点创建 WKT，而只需执行 geography::Point(Latitude, Longitude, SRID)。这是 doc。

SQL服务器地理纬度经度错误

SQL Server geography latitude longitude error

sql-server

sqlgeography