wgs转utm vb代码

### 回答1：
以下是一个将 WGS 坐标系转换为 UTM 坐标系的 VB 代码示例：

Private Sub WGS2UTM(ByVal lat As Double, ByVal lon As Double, ByRef zone As Integer, ByRef easting As Double, ByRef northing As Double)
    ' Constants
    Dim a As Double, f As Double, k As Double
    a = 6378137 ' WGS 84 semi-major axis
    f = 1 / 298.257223563 ' WGS 84 flattening
    k = .9996 ' UTM scale factor at the equator

    ' Compute intermediate values
    Dim b As Double, e As Double, e2 As Double, e4 As Double, e6 As Double, e8 As Double
    b = a * (1 - f) ' WGS 84 semi-minor axis
    e2 = (a ^ 2 - b ^ 2) / a ^ 2 ' Eccentricity squared
    e = Sqr(e2) ' Eccentricity
    e4 = e2 ^ 2
    e6 = e2 ^ 3
    e8 = e2 ^ 4

    ' Compute zone number
    zone = Int((lon + 180) / 6) + 1

    ' Compute central meridian
    Dim cm As Double
    cm = (zone - 1) * 6 - 180 + 3

    ' Convert latitude and longitude to radians
    Dim phi As Double, lambda As Double
    phi = lat * Pi / 180
    lambda = lon * Pi / 180

    ' Compute meridian distance
    Dim M As Double
    M = a * ((1 - e2 / 4 - 3 * e4 / 64 - 5 * e6 / 256) * phi - (3 * e2 / 8 + 3 * e4 / 32 + 45 * e6 / 1024) * Sin(2 * phi) + (15 * e4 / 256 + 45 * e6 / 1024) * Sin(4 * phi) - (35 * e6 / 3072) * Sin(6 * phi))

    ' Compute radius of curvature in the prime vertical
    Dim N As Double
    N = a / Sqr(1 - e2 * Sin(phi) ^ 2)

    ' Compute transverse mercator parameters
    Dim T As Double, C As Double, A As Double, M As Double
    T = Tan(phi) ^ 2
    C = e2 / (1 - e2) * Cos(phi) ^ 2
    A = (lambda - cm) * Cos(phi)
    M = a * ((1 - e2 / 4 - 3 * e4 / 64 - 5 * e6 / 256) * phi - (3 * e2 / 8 + 3 * e4 / 32 + 45 * e6 / 1024) * Sin(2 * phi) + (15 * e4 / 256 + 45 * e6 / 1024) * Sin(4 * phi) - (35 * e6 / 3072) * Sin(6 * phi))

    ' Compute easting and northing
    easting = k * N * (A + (1 - T + C) * A ^ 3 / 6 + (5 - 18 * T + T ^ 2 + 72 * C - 58 * e2) * A ^ 5 / 120)
    northing = k * (M - M + N * Tan(phi) * (A ^ 2 / 2 + (5 - T + 9 * C + 4 * C ^ 2) * A ^ 4 / 24 + (61 - 58 * T + T ^ 2 + 600 * C - 330 * e2) * A ^ 6 / 720))

    ' Add false easting and northing
    easting = easting + 500000
    If lat <  Then
        northing = northing + 10000000
    End If
End Sub

这段代码可以将给定的经纬度坐标转换为 UTM 坐标系下的东北坐标。其中，输入参数为经度和纬度，输出参数为所在 UTM 带号、东向坐标和北向坐标。

### 回答2：
WGS转UTM是一种将地理坐标从WGS84（World Geodetic System 1984）转换为UTM（Universal Transverse Mercator）的常见需求。在VB代码中，可以使用数学库中的相关函数来实现此转换。

首先，我们需要明确WGS坐标的经纬度和UTM坐标的东北方向。WGS坐标由经度和纬度表示，而UTM坐标由一个东北方向和一个区域表示。

在VB代码中，我们可以使用以下公式将WGS坐标转换为UTM坐标：
1. 使用大地主题反算公式将经纬度转换为大地平面坐标；
2. 将大地平面坐标转换为UTM坐标。

例如，以下是一个简单的VB代码示例，将WGS坐标转换为UTM坐标：

' 引入所需的命名空间和库
Imports System
Imports ProjNet
Imports ProjNet.CoordinateSystems
Imports ProjNet.CoordinateSystems.Transformations

' 定义WGS坐标和UTM坐标
Dim wgsCoordinate As New GeoAPI.Geometries.Coordinate(-122.4194, 37.7749) ' WGS坐标为旧金山市的经纬度
Dim utmCoordinate As GeoAPI.Geometries.Coordinate ' UTM坐标

' 定义WGS84和UTM投影
Dim wgs84 As ICoordinateSystem = GeographicCoordinateSystem.WGS84
Dim utm As IProjectedCoordinateSystem = ProjectedCoordinateSystem.WGS84_UTM(10, True)

' 创建坐标转换器
Dim transformFactory As New CoordinateTransformationFactory()
Dim transformer As ICoordinateTransformation = transformFactory.CreateFromCoordinateSystems(wgs84, utm)

' 将WGS坐标转换为UTM坐标
utmCoordinate = transformer.MathTransform.Transform(wgsCoordinate)

' 打印转换结果
Console.WriteLine("WGS Coordinate: " & wgsCoordinate.ToString())
Console.WriteLine("UTM Coordinate: " & utmCoordinate.ToString())

上述代码使用ProjNet库中的ProjNet.CoordinateSystems和ProjNet.CoordinateSystems.Transformations命名空间，定义了WGS坐标和UTM坐标，并创建了坐标转换器。最后，通过调用MathTransform.Transform方法，将WGS坐标转换为UTM坐标。

以上就是一个简单的VB代码示例，用于将WGS坐标转换为UTM坐标。您可以根据特定的需求进行定制和优化。