geo

package
v0.0.0-...-d078246 Latest Latest
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 Go to latest Published: Jul 18, 2022 License: MIT Imports: 10 Imported by: 0

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Index

Constants

View Source 
const (
	DefaultTileSize = 256
	DefaultMinZoom  = 0
	DefaultMaxZoom  = 23
)
View Source 
const (
	// E Eccentricity of Earth ellipsoid
	E                = 0.0818191908426
	MajorEarthRadius = 6378137.0
	SubRadius        = 1 / MajorEarthRadius
	Equator          = 2 * math.Pi * MajorEarthRadius
	HalfEquator      = Equator / 2
	SubEquator       = 1 / Equator
	HalfPi           = math.Pi / 2
	Rad2Deg          = 180 / math.Pi

	MaxLat = 90.0
	MinLat = -90.0
	MaxLon = 180.0
	MinLon = -180.0

	EGS3857MinLat = -85.0840
	EGS3857MaxLat = 85.0840
)
View Source 
const DegreesToRadiansFactor = math.Pi / 180
View Source 
const RadiansToDegreesFactor = 180 / math.Pi

Variables

View Source 
var DefaultGeoSystemConfig = &Config{
	ProjectionType: WGS84,
	MinZoom:        DefaultMinZoom,
	MaxZoom:        DefaultMaxZoom,
	TileSize:       DefaultTileSize,
}

Functions

func Bits 

func Bits(val int64) string

func Colorize 

func Colorize(color string, s interface{}) string

func CycleRestrict 

func CycleRestrict(value, min, max float64) float64

func DegreesToRadians 

func DegreesToRadians(x float64) float64

func FromWKT 

func FromWKT(s string) geom.T

func GlobalPixelsToWGS84WithGD 

func GlobalPixelsToWGS84WithGD(gpx, gpy float64, zoom int64) (lat, lon float64)

GlobalPixelsToWGS84WithGD GD - https://en.wikipedia.org/wiki/Gudermannian_function

func ParseAsFloatArray 

func ParseAsFloatArray(line string) ([]float64, error)

func ParseAsInt64Array 

func ParseAsInt64Array(line string) ([]int64, error)

func RadiansToDegrees 

func RadiansToDegrees(x float64) float64

func Restrict 

func Restrict(value, min, max float64) float64

func RoundToDigit 

func RoundToDigit(v float64, n int) float64

RoundToDigit rounds number to N digits after dot

func ToWKT 

func ToWKT(g Primitive) string

Types

type AbstractGeographic 

type AbstractGeographic struct {
	SRID
	geom.T
}

func (*AbstractGeographic) Scan 

func (g *AbstractGeographic) Scan(input interface{}) error

func (AbstractGeographic) Value 

func (g AbstractGeographic) Value() (driver.Value, error)

type BBox 

type BBox struct {
	XMin float64
	XMax float64
	YMin float64
	YMax float64
}

func NewBBox 

func NewBBox(coordsStr string) (BBox, error)

func (*BBox) AsPolygon 

func (r *BBox) AsPolygon() *GeographicPolygon

type Config 

type Config struct {
	TileSize       int64 `json:"tile_size" yaml:"tile_size"`
	MinZoom        int64 `json:"min_zoom" yaml:"min_zoom"`
	MaxZoom        int64 `json:"max_zoom" yaml:"max_zoom"`
	ProjectionType SRID  `json:"projection_type" yaml:"projection_type"`
}

type Data 

type Data interface {
	Scan(input interface{}) error
	Value() (driver.Value, error)
}

type DataSource 

type DataSource interface {
	LoadMapView(ctx context.Context, mr *MapRequest, fc *FeatureCollection) error
	StoreGeoData(ctx context.Context, d interface{}) error
}

type FeatureCollection 

type FeatureCollection struct {
	geojson.FeatureCollection
}

func NewFeatureCollection 

func NewFeatureCollection() *FeatureCollection

func (*FeatureCollection) Add 

func (f *FeatureCollection) Add(id interface{}, geo interface{}, properties map[string]interface{}) error

func (*FeatureCollection) MarshalToJSONP 

func (f *FeatureCollection) MarshalToJSONP(callbackID string) ([]byte, error)

type Geographic 

type Geographic interface {
	SRID() int
}

type GeographicCollection 

type GeographicCollection struct {
	SRID
	Figures []Primitive
}

func (*GeographicCollection) FromGeom 

func (p *GeographicCollection) FromGeom(t geom.T) error

func (*GeographicCollection) Scan 

func (p *GeographicCollection) Scan(input interface{}) error

func (*GeographicCollection) ToGeom 

func (p *GeographicCollection) ToGeom() (geom.T, error)

func (GeographicCollection) Value 

func (p GeographicCollection) Value() (driver.Value, error)

type GeographicMultiPolygon 

type GeographicMultiPolygon struct {
	SRID
	Polygons []*GeographicPolygon
}

func (*GeographicMultiPolygon) FromGeom 

func (p *GeographicMultiPolygon) FromGeom(t geom.T) error

func (*GeographicMultiPolygon) Scan 

func (p *GeographicMultiPolygon) Scan(input interface{}) error

func (*GeographicMultiPolygon) ToGeom 

func (p *GeographicMultiPolygon) ToGeom() (geom.T, error)

func (GeographicMultiPolygon) Value 

func (p GeographicMultiPolygon) Value() (driver.Value, error)

type GeographicPoint 

type GeographicPoint struct {
	SRID
	Latitude  float64
	Longitude float64
}

func (*GeographicPoint) FromGeom 

func (p *GeographicPoint) FromGeom(t geom.T) error

func (*GeographicPoint) Scan 

func (p *GeographicPoint) Scan(input interface{}) error

func (*GeographicPoint) ToGeom 

func (p *GeographicPoint) ToGeom() (geom.T, error)

func (GeographicPoint) Value 

func (p GeographicPoint) Value() (driver.Value, error)

type GeographicPolygon 

type GeographicPolygon struct {
	SRID
	Points []*GeographicPoint
}

func (*GeographicPolygon) FromGeom 

func (p *GeographicPolygon) FromGeom(t geom.T) error

func (*GeographicPolygon) Scan 

func (p *GeographicPolygon) Scan(input interface{}) error

func (*GeographicPolygon) ToGeom 

func (p *GeographicPolygon) ToGeom() (geom.T, error)

func (GeographicPolygon) Value 

func (p GeographicPolygon) Value() (driver.Value, error)

type GeographicSystem 

type GeographicSystem struct {
	TileSystem    *TileSystem
	QuadKeySystem *QuadKeySystem
	Projection    Projection
	// contains filtered or unexported fields
}

func NewGeographicSystem 

func NewGeographicSystem(cfg *Config) *GeographicSystem

func (*GeographicSystem) CoordinatesToQuadKey 

func (g *GeographicSystem) CoordinatesToQuadKey(lat, long float64) QuadKey

func (*GeographicSystem) DrawROMBBox 

func (g *GeographicSystem) DrawROMBBox(mr *MapRequest, fc *FeatureCollection) error

func (*GeographicSystem) DrawROMTiles 

func (g *GeographicSystem) DrawROMTiles(mr *MapRequest, fc *FeatureCollection) error

func (*GeographicSystem) MRToTiles 

func (g *GeographicSystem) MRToTiles(mr *MapRequest) (tiles map[int64]Tile)

func (*GeographicSystem) TileIDToCenterPoint 

func (g *GeographicSystem) TileIDToCenterPoint(tileID int64) (*GeographicPoint, error)

func (*GeographicSystem) TileXYToCenterPoint 

func (g *GeographicSystem) TileXYToCenterPoint(tx, ty int64, z int64) *GeographicPoint

func (*GeographicSystem) TileXYToPoint 

func (g *GeographicSystem) TileXYToPoint(tx, ty int64, z int64) *GeographicPoint

func (*GeographicSystem) TileXYToPolygon 

func (g *GeographicSystem) TileXYToPolygon(tx, ty int64, zoom int64) *GeographicPolygon

type MapRequest 

type MapRequest struct {
	TileBBox
	BBox
	Zoom         int64
	CallbackID   string
	Debug        bool
	ClusterDepth int64
}

func ParseMapRequest 

func ParseMapRequest(coordsStr, tileStr, zoomStr, callbackID, debugStr, clusterDepthStr string) (*MapRequest, error)

ParseMapRequest from comma separated strings

type Point 

type Point interface {
	X() float64
	Y() float64
}

type Primitive 

type Primitive interface {
	ToGeom() (geom.T, error)
	FromGeom(t geom.T) error
}

func FromGeom 

func FromGeom(g geom.T) (Primitive, error)

type Projection 

type Projection interface {
	ToGlobalPixels(lat, lon float64, z int64) (gpx, gpy float64)
	FromGlobalPixels(gpx, gpy float64, z int64) (lat, lon float64)
}

type QuadKey 

type QuadKey []rune

func NewQuadKeyFromInt64 

func NewQuadKeyFromInt64(val int64) QuadKey

func (QuadKey) Bits 

func (q QuadKey) Bits() string

func (QuadKey) Copy 

func (q QuadKey) Copy() QuadKey

func (QuadKey) Int64 

func (q QuadKey) Int64() int64

func (QuadKey) Len 

func (q QuadKey) Len() int64

func (QuadKey) String 

func (q QuadKey) String() string

func (QuadKey) View 

func (q QuadKey) View() string

type QuadKeySystem 

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

func NewQuadKeySystem 

func NewQuadKeySystem(minZoom int64, maxZoom int64) *QuadKeySystem

func (*QuadKeySystem) BitDelta 

func (q *QuadKeySystem) BitDelta(len int64) int64

func (*QuadKeySystem) Contains 

func (q *QuadKeySystem) Contains(point QuadKey, tile QuadKey) bool

func (*QuadKeySystem) CreateMask 

func (q *QuadKeySystem) CreateMask(qk QuadKey, zoom int64, clusterLevel int64) QuadKey

func (*QuadKeySystem) QuadKeyRange 

func (q *QuadKeySystem) QuadKeyRange(quadKey QuadKey) (min QuadKey, max QuadKey)

func (*QuadKeySystem) QuadKeyToTileXY 

func (q *QuadKeySystem) QuadKeyToTileXY(quadKey QuadKey) (tileX, tileY int64, err error)

func (*QuadKeySystem) TileXYToQuadKey 

func (q *QuadKeySystem) TileXYToQuadKey(tx, ty int64, zoom int64) QuadKey

type SRID 

type SRID int
const (
	WGS84       SRID = 4326
	WebMercator SRID = 3857
)

func DefaultSRID 

func DefaultSRID(srid SRID) SRID

type Tile 

type Tile struct {
	ID         int64
	X          int64
	Y          int64
	Zoom       int64
	QuadKey    QuadKey
	MinQuadKey QuadKey
	MaxQuadKey QuadKey
}

type TileBBox 

type TileBBox struct {
	TileXMin int64
	TileXMax int64
	TileYMin int64
	TileYMax int64
}

func NewTileBBox 

func NewTileBBox(tileStr string) (TileBBox, error)

func (*TileBBox) IterateTiles 

func (r *TileBBox) IterateTiles(cb func(x, y int64) error) error

func (*TileBBox) TilesNumber 

func (r *TileBBox) TilesNumber() int64

type TileSystem 

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

TileSystem allow transform any coordinate to TileXY

func NewTileSystem 

func NewTileSystem(minZoom, maxZoom int64, tileSize int64) *TileSystem

func (*TileSystem) GlobalPixelsToTileXY 

func (t *TileSystem) GlobalPixelsToTileXY(gpx, gpy float64) (tx, ty int64)

func (*TileSystem) TileXYToGlobalPixels 

func (t *TileSystem) TileXYToGlobalPixels(tx, ty int64) (gpx, gpy float64)

func (*TileSystem) TileXYToGlobalPixelsCenter 

func (t *TileSystem) TileXYToGlobalPixelsCenter(tx, ty int64) (gpx, gpy float64)

type YandexGPConverter 

type YandexGPConverter struct {
	E float64
}

YandexGPConverter https://yandex.ru/dev/maps/tiles/doc/dg/concepts/about-tiles.html#get-tile-number https://yastatic.net/s3/front-maps-static/maps-front-jsapi-v2-1/2.1.79-41/build/debug/full-f444800dea2e3f74c30f6b13a88f1a6a7b7eb78a.js

func NewYandexGPConverter 

func NewYandexGPConverter(e float64) *YandexGPConverter

func (YandexGPConverter) FromGlobalPixels 

func (g YandexGPConverter) FromGlobalPixels(gpx, gpy float64, zoom int64) (lat, lon float64)

func (YandexGPConverter) ToGlobalPixels 

func (g YandexGPConverter) ToGlobalPixels(lat, lon float64, zoom int64) (gpx, gpy float64)

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