type Degreesfloat64

funcMustParseDegrees¶

func MustParseDegrees(sstring)Degrees

MustParseDegrees parses s as decimal degrees, but panics on error.

funcParseDegrees¶

func ParseDegrees(sstring) (Degrees,error)

ParseDegrees parses s as decimal degrees.

func (Degrees)AppendText¶

func (dDegrees) AppendText(b []byte) ([]byte,error)

AppendText implementsencoding.TextAppender. The output is formatted indecimal degrees, prefixed by either the appropriate + or - sign.

func (Degrees)AppendZeroPaddedText¶

func (dDegrees) AppendZeroPaddedText(b []byte, nintint) []byte

AppendZeroPaddedText appends d formatted as decimal degrees to b. The number ofinteger digits will be zero-padded to nint.

func (Degrees)Radians¶

func (dDegrees) Radians()Radians

Radians converts d into radians.

func (Degrees)String¶

func (dDegrees) String()string

String implements the [Stringer] interface. The output is formatted indecimal degrees, prefixed by either the appropriate + or - sign, and suffixedby a ° degree symbol.

func (Degrees)Turns¶

func (dDegrees) Turns()Turns

Turns converts d into a number of turns.

type Distancefloat64

funcDistanceOnEarth¶

func DistanceOnEarth(tTurns)Distance

DistanceOnEarth converts t turns into the great-circle distance, in meters.

funcMustParseDistance¶

func MustParseDistance(sstring)Distance

MustParseDistance parses s as distance in meters, but panics on error.

funcParseDistance¶

func ParseDistance(sstring) (Distance,error)

ParseDistance parses s as distance in meters.

func (Distance)String¶

func (dDistance) String()string

String implements the [Stringer] interface.

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

funcMakePoint¶

func MakePoint(latitude, longitudeDegrees)Point

MakePoint returns a Point representing a given latitude and longitude ona WGS 84 ellipsoid. The Coordinate Reference System is EPSG:4326.Latitude is wrapped to [-90°, +90°] and longitude to (-180°, +180°].

func (Point)AppendBinary¶

func (pPoint) AppendBinary(b []byte) ([]byte,error)

AppendBinary implementsencoding.BinaryAppender. The output consists of twofloat32s in big-endian byte order: latitude and longitude offset by 180°.If p is not a valid, the output will be an 8-byte zero value.

func (Point)AppendText¶

func (pPoint) AppendText(b []byte) ([]byte,error)

AppendText implementsencoding.TextAppender. The output is a pointformatted as OGC Well-Known Text, as "POINT (longitude latitude)" wherelongitude and latitude are in decimal degrees. If p is not valid, the outputwill be "POINT EMPTY".

func (Point)DistanceTo¶

func (pPoint) DistanceTo(qPoint) (Distance,error)

DistanceTo reports the great-circle distance between p and q, in meters.

func (Point)EqualApprox¶

func (pPoint) EqualApprox(qPoint, tolfloat64)bool

EqualApprox reports if p and q are approximately equal: that is the absolutedifference of both latitude and longitude are less than tol. If tol isnegative, then tol defaults to a reasonably small number (10⁻⁵). If tol iszero, then p and q must be exactly equal.

func (Point)IsZero¶

func (pPoint) IsZero()bool

IsZero reports if p is the zero value.

func (Point)LatLng¶

func (pPoint) LatLng() (lat, lngDegrees, errerror)

LatLng reports the latitude and longitude.

func (Point)LatLngFloat64¶

func (pPoint) LatLngFloat64() (lat, lngfloat64, errerror)

LatLng reports the latitude and longitude in float64. If err is nil, then latand lng will never both be 0.0 to disambiguate between an empty struct andNull Island (0° 0°).

func (Point)MarshalBinary¶

func (pPoint) MarshalBinary() ([]byte,error)

MarshalBinary implementsencoding.BinaryMarshaller. The output matches thatof callingPoint.AppendBinary.

func (Point)MarshalText¶

func (pPoint) MarshalText() ([]byte,error)

MarshalText implementsencoding.TextMarshaller. The output matches thatof callingPoint.AppendText.

func (Point)MarshalUint64¶

func (pPoint) MarshalUint64() (uint64,error)

MarshalUint64 produces the same output as MashalBinary, encoded in a uint64.

func (Point)Quantize¶

func (pPoint) Quantize()Point

Quantize returns a newPoint after throwing away enough location data in pso that it would be difficult to distinguish a node among all the other nodesin its general vicinity. One caveat is that if there’s only one point in anobscure location, someone could triangulate the node using additional data.

This method is stable: given the same p, it will always return the sameresult. It is equivalent to snapping to points on Earth that are at leastMinSeparation apart.

func (Point)SphericalAngleTo¶

func (pPoint) SphericalAngleTo(qPoint) (Radians,error)

SphericalAngleTo returns the angular distance from p to q, calculated on aspherical Earth.

func (Point)String¶

func (pPoint) String()string

String returns a space-separated pair of latitude and longitude, in decimaldegrees. Positive latitudes are in the northern hemisphere, and positivelongitudes are east of the prime meridian. If p was not initialized, thiswill return "nowhere".

func (*Point)UnmarshalBinary¶

func (p *Point) UnmarshalBinary(data []byte)error

UnmarshalBinary implementsencoding.BinaryUnmarshaler. It expects inputthat was formatted byPoint.AppendBinary: in big-endian byte order, afloat32 representing latitude followed by a float32 representing longitudeoffset by 180°. If latitude and longitude fall outside valid ranges, thenan error is returned.

func (*Point)UnmarshalUint64¶

func (p *Point) UnmarshalUint64(vuint64)error

UnmarshalUint64 expects input formatted by MarshalUint64.

func (Point)Valid¶

func (pPoint) Valid()bool

Valid reports if p is a valid point.

type Radiansfloat64

funcMustParseRadians¶

func MustParseRadians(sstring)Radians

MustParseRadians parses s as radians, but panics on error.

funcParseRadians¶

func ParseRadians(sstring) (Radians,error)

ParseRadians parses s as radians.

func (Radians)Degrees¶

func (rRadians) Degrees()Degrees

Degrees converts r into decimal degrees.

func (Radians)String¶

func (rRadians) String()string

String implements the [Stringer] interface.

func (Radians)Turns¶

func (rRadians) Turns()Turns

Turns converts r into a number of turns.

type Turnsfloat64

func (Turns)Degrees¶

func (oTurns) Degrees()Degrees

Degrees converts t into decimal degrees.

func (Turns)Radians¶

func (oTurns) Radians()Radians

Radians converts t into radians.

func (Turns)String¶

func (oTurns) String()string

String implements the [Stringer] interface.