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A turf.js-like geospatial analysis library working with GeoJSON, written in pure Dart.

turf.dart #

pub package

THIS PROJECT IS WORK IN PROCESS

A turf.js-like geospatial analysis library working with GeoJSON, written in pure Dart.

This includes a fully RFC 7946-compliant object-representation and serialization for GeoJSON.

Most of the implementation is a direct translation from turf.js.

GeoJSON Object Model #

polymorphism

Notable Design Decisions #

  • Nested GeometryCollections (as described in RFC 7946 section 3.1.8) are not supported which takes a slightly firmer stance than the "should avoid" language in the specification

Tests and Benchmarks #

Tests are run with dart test and benchmarks can be run with dart run benchmark

Any new benchmarks must be named *_benchmark.dart and reside in the ./benchmark folder.

Components #

Measurement #

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

Coordinate Mutation #

  • cleanCoords
  • flip
  • rewind
  • round
  • truncate

Transformation #

  • bboxClip
  • bezierSpline
  • buffer
  • circle
  • clone - implemented as a member function of each [GeoJSONObject]
  • concave
  • convex
  • difference
  • dissolve
  • intersect
  • lineOffset
  • polygonSmooth
  • simplify
  • tesselate
  • transformRotate
  • transformTranslate
  • transformScale
  • union
  • voronoi

Feature Conversion #

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

MISC #

  • ellipse
  • kinks
  • lineArc
  • lineChunk
  • lineIntersect
  • lineOverlap
  • lineSegment
  • lineSlice
  • lineSliceAlong
  • lineSplit
  • mask
  • nearestPointOnLine
  • sector
  • shortestPath
  • unkinkPolygon

Random #

  • randomPosition
  • randomPoint
  • randomLineString
  • randomPolygon

Data #

  • sample

Interpolation #

  • interpolate
  • isobands
  • isolines
  • planepoint
  • tin

Joins #

  • pointsWithinPolygon
  • tag

Grids #

  • hexGrid
  • pointGrid
  • squareGrid
  • triangleGrid

Classification #

Aggregation #

  • collect
  • clustersDbscan
  • clustersKmeans

META #

Booleans #

  • booleanClockwise
  • booleanConcave
  • booleanContains
  • booleanCrosses
  • booleanDisjoint
  • booleanEqual
  • booleanIntersects
  • booleanOverlap
  • booleanParallel
  • booleanPointInPolygon
  • booleanPointOnLine
  • booleanWithin

Unit Conversion #

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Publisher

verified publishergeometrico.dev

A turf.js-like geospatial analysis library working with GeoJSON, written in pure Dart.

Repository (GitHub)
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License

unknown (LICENSE)

Dependencies

json_annotation

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