turf.kt

Advanced, cross platform, geospatial analysis for Kotlin.

turf.kt is a multi-platform Kotlin library for spatial analysis based on Turf .

turf.kt uses GeoJSON data classes provided by the geojson.kt project. turf.kt expects the data to be standard WGS84 longitude, latitude coordinates. Check out geojson.io for a tool to easily create this data.

Progress

The list below outlines the Turf functions which currently exist within turf.kt:

Measurement

• along
• area
• bbox
• bboxPolygon -> BBox:toPolygon
• bearing
• center
• centerOfMass
• centroid
• destination
• distance
• envelope
• length
• midpoint
• pointOnFeature
• polygonTangents
• pointToLineDistance
• rhumbBearing
• rhumbDestination
• rhumbDistance
• square
• greatCircle

Coordinate Mutation

• cleanCoords -> clean
• flip
• rewind
• round Use Kotlin's round
• truncate

Transformation

• bboxClip
• bezierSpline
• buffer
• circle
• clone Use copy
• concave
• convex
• difference
• dissolve
• intersect
• lineOffset
• simplify
• tesselate
• transformRotate
• transformTranslate
• transformScale
• union
• voronoi

Feature Conversion

• combine
• explode
• flatten
• lineToPolygon
• polygonize
• polygonToLine

Misc

• kinks
• lineArc -> arc
• lineChunk
• lineIntersect
• lineOverlap
• lineSegment -> segment
• lineSlice
• lineSliceAlong
• lineSplit
• mask
• nearestPointOnLine
• sector
• shortestPath
• unkinkPolygon

Helper

See geojson.kt.

Random

• randomPosition
• randomPoint
• randomLineString
• randomPolygon

Data

• sample

Interpolation

• interpolate
• isobands
• isolines
• planepoint
• tin

Joins

• pointsWithinPolygon
• tag

Grids

• hexGrid
• pointGrid
• squareGrid
• triangleGrid

Classification

• nearestPoint

Aggregation

• collect
• clustersDbScan
• clustersKMeans

Meta

• coordAll
• coordEach
• coordReduce
• featureEach
• featureReduce
• flattenEach
• flattenReduce
• getCoord
• getCoords
• getGeom
• getType
• geomEach
• geomReduce
• propEach
• propReduce
• segmentEach
• segmentReduce
• getCluster
• clusterEach
• clusterReduce

Assertions

See geojson.kt

Booleans

• booleanClockwise -> isClockwise()/isCounterClockwise()
• booleanContains
• booleanCrosses
• booleanDisjoint
• booleanEqual -> ==, !=
• booleanOverlap
• booleanParallel
• booleanPointInPolygon
• booleanPointOnLine
• booleanWithin

Unit Conversion

• bearingToAzimuth
• convertArea
• convertLength
• degreesToRadians -> Double.toRadians()
• lengthToRadians
• lengthToDegrees
• radiansToLength
• radiansToDegrees -> Double.toDegrees()
• toMercator
• toWgs84