mputil

package
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Published: Oct 6, 2018 License: MIT Imports: 3 Imported by: 0

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Functions

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Types

type MultiSegment

type MultiSegment []Segment

MultiSegment is an ordered set of segments that form a continuous section of a multipolygon.

func Join

func Join(segments []Segment) []MultiSegment

Join will join a set of segments into a set of connected MultiSegments.

func (MultiSegment) First

func (ms MultiSegment) First() orb.Point

First returns the first point in the list of linestrings.

func (MultiSegment) Last

func (ms MultiSegment) Last() orb.Point

Last returns the last point in the list of linestrings.

func (MultiSegment) LineString

func (ms MultiSegment) LineString() orb.LineString

LineString converts a multisegment into a geo linestring object.

func (MultiSegment) Orientation

func (ms MultiSegment) Orientation() orb.Orientation

Orientation computes the orientation of a multisegment like if it was ring.

func (MultiSegment) Ring

func (ms MultiSegment) Ring(o orb.Orientation) orb.Ring

Ring converts the multisegment to a ring of the given orientation. It uses the orientation on the members if possible.

type Segment

type Segment struct {
	Index       uint32
	Orientation orb.Orientation
	Reversed    bool
	Line        orb.LineString
}

Segment is a section of a multipolygon with some extra information on the member it came from.

func Group

func Group(
	members osm.Members,
	ways map[osm.WayID]*osm.Way,
	at time.Time,
) (outer, inner []Segment, tainted bool)

Group will take the members and group them by inner our outer parts of the relation. Will also build the way geometry.

func (Segment) First

func (s Segment) First() orb.Point

First returns the first point in the segment linestring.

func (Segment) Last

func (s Segment) Last() orb.Point

Last returns the last point in the segment linestring.

func (*Segment) Reverse

func (s *Segment) Reverse()

Reverse will reverse the line string of the segment.

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