xcoord

package

v1.0.4 Latest Latest Go to latest Published: Feb 20, 2025 License: Apache-2.0 Imports: 2 Imported by: 0

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github.com/yiigo/contrib

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Documentation ¶

Index ¶

type EllipsoidParameter
- func NewWGS84Parameter() *EllipsoidParameter
type Location
- func NewLocation(lng, lat float64) *Location
type Point
- func NewPoint(x, y float64, ml ...int) *Point
type ProjType
type ZtGeoCoordTransform
- func NewZtGeoCoordTransform(ml int, pt ProjType) *ZtGeoCoordTransform
- func (zgct *ZtGeoCoordTransform) BL2XY(loc *Location) *Point
- func (zgct *ZtGeoCoordTransform) XY2BL(p *Point) *Location

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type EllipsoidParameter ¶

type EllipsoidParameter struct {
	A   float64
	B   float64
	F   float64
	E2  float64
	EP2 float64
	C   float64
	A0  float64
	A2  float64
	A4  float64
	A6  float64
}

EllipsoidParameter 椭球体参数

func NewWGS84Parameter ¶

func NewWGS84Parameter() *EllipsoidParameter

NewWGS84Parameter 生成 WGS84 椭球体参数

type Location ¶

type Location struct {
	// contains filtered or unexported fields
}

Location 地理位置(经纬度)

func NewLocation ¶

func NewLocation(lng, lat float64) *Location

NewLocation 生成一个Location

func (*Location) Azimuth ¶

func (l *Location) Azimuth(t *Location) float64

Azimuth 根据经纬度计算方位角(0 ～ 360)

func (*Location) Distance ¶

func (l *Location) Distance(t *Location) float64

Distance 根据经纬度计算距离(单位：m)

func (*Location) Latitude ¶

func (l *Location) Latitude() float64

Latitude 返回维度

func (*Location) Longtitude ¶

func (l *Location) Longtitude() float64

Longtitude 返回经度

func (*Location) String ¶

func (l *Location) String() string

String 实现 Stringer 接口

type Point ¶

type Point struct {
	// contains filtered or unexported fields
}

Point 直角坐标系点

func NewPoint ¶

func NewPoint(x, y float64, ml ...int) *Point

NewPoint 生成一个直角坐标系的点；可选参数 `ml` 是用于大地平面直角坐标系间转经纬度的子午线值

func (*Point) MLine ¶

func (p *Point) MLine() int

MLine 返回用于大地平面直角坐标系间转经纬度的子午线值

func (*Point) String ¶

func (p *Point) String() string

String 实现 Stringer 接口

func (*Point) X ¶

func (p *Point) X() float64

X 返回x坐标

func (*Point) Y ¶

func (p *Point) Y() float64

Y 返回y坐标

type ProjType ¶

type ProjType int

ProjType 投影类型

const (
	GK  ProjType = iota // 高斯-克吕格(Gauss-Kruger)投影
	UTM                 // UTM投影
)

type ZtGeoCoordTransform ¶

type ZtGeoCoordTransform struct {
	// contains filtered or unexported fields
}

ZtGeoCoordTransform 经纬度与大地平面直角坐标系间的转换；

[翻译自C++代码](https://www.cnblogs.com/xingzhensun/p/11377963.html)

func NewZtGeoCoordTransform ¶

func NewZtGeoCoordTransform(ml int, pt ProjType) *ZtGeoCoordTransform

NewZtGeoCoordTransform 返回经纬度与大地平面直角坐标系间的转换器；

[示例]
zgct := contrib.NewZtGeoCoordTransform(-360, contrib.GK)

func (*ZtGeoCoordTransform) BL2XY ¶

func (zgct *ZtGeoCoordTransform) BL2XY(loc *Location) *Point

BL2XY 经纬度转大地平面直角坐标系点

func (*ZtGeoCoordTransform) XY2BL ¶

func (zgct *ZtGeoCoordTransform) XY2BL(p *Point) *Location

XY2BL 大地平面直角坐标系点转经纬度

Source Files ¶

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