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7.0.0 (prerelease)

We intend to keep making breaking changes before 7.0.0 is fully released. If you intend to take a dependency on the 7.0 prereleases consider pinning the exact version dependency to avoid unintended breaks.

⚠️ Breaking

  • Move to @types/geojson package instead of declaring our own (#2158)
  • Move distribution JS to target ES2017 (#2237)
  • @turf/helpers Correct the conversion factor for degrees (#2177)
  • @turf/helpers polygon() will now throw if the first and last coordinates are not the same (#2173)
  • @turf/helpers Separate AreaUnits into its own type (#2393)
  • @turf/area Fix earth radius to use WGS84 median earth radius (#2166)
  • @turf/turf Remove re-exports for turf 4.x compatability (#2183)
  • @turf/rectangle-grid Fix correctness for large areas (#2106)
  • `@turf/square-grid Fix correctness for large areas (#2106)
  • @turf/union Accept FeatureCollection for multiple inputs (#2247)
  • @turf/difference Accept FeatureCollection for multiple inputs (#2247)
  • @turf/intersect Accept FeatureCollection for multiple inputs (#2247)

🏅 New Features/Enhancements

🐛 Bug Fixes

📖 Documentation

🔔 Misc

  • `@turf/turf Add booleanIntersects typescript export (#2157)
  • `@turf/turf Add booleanTouches export (#2170)
  • `@turf/turf Add booleanConcave export (#2265)
  • `@turf/helpers Make isObject a little more accurate (#2176)
  • Add custom types entry point to exports, required by Typescript for node16, nodenext and bundler module resolution strategies (#2400, #2452)
  • types.ts tests are now run in strict mode (#2363)
  • Uses tslib now for smaller bundles (#2165)
  • Remove object-assign dependency from all packages (#2241)
  • Lots of dependencies have been upgraded

6.5.0

🏅 New Features/Enhancements

🐛 Bug Fixes

📖 Documentation

🔔 Misc

  • Enable TS Strict Mode (PR #2126 - Author @mfedderly)

6.4.0

🏅 New Features/Enhancements

🐛 Bug Fixes

📖 Documentation

🔔 Misc

  • @turf/concave Replace deprecated topojson dependency (PR #2037 - Author @elliots)

  • Work towards enabling TS Strict Mode (PR #2053 - Author @mfedderly)

6.3.0

Fix issues importing Turf for react-native, webpack 5, and other bundlers

(PR #2004 - Author r0b0t3d) (PR #2011 - Author mfedderly)

[@turf/turf][turf] expose @turf/boolean-intersect

(PR #2007 - Author rowanwins)

6.2.0

After a bit of hiatus, TurfJS is resuming releases.

⭐️ Major Updates

  • ES Modules available for all packages
  • Tree shaking should significantly reduce import size of @turf/turf
  • Better support for ESM modules (PR #1942 - Author @diachedelic)
  • Clean-up of test and benchmark running to make publishing easier
  • Enforce styling using Prettier
  • Enable ESLint and get rid of unused variables
  • Upgrade rollup for more correct javascript module builds
  • Only include ES5 code

🚀 New Modules

[@turf/boolean-touches][boolean-touches]

Determines if two features touch but do not intersect

[@turf/boolean-valid][boolean-valid]

Checks if the geometry is a valid according to the OGC Simple Feature Specification

[@turf/quadrat-analysis][quadrat-analysis]

Performs a quadrat analysis on a set of points

[@turf/rectangle-grid][rectangle-grid]

Creates a grid of rectangles from a bounding box

@turf/voroni

Typescript types for the options parameter have been fixed (PR #1424 - Author @stevage)

@turf/points-within-polygon

Typescript types around the Feature's Properties will now be preserved. (PR #1761 - Author @rugheid)

@turf/rewind

Typescript types for the 'reverse' option are now correct. Previously it was misnamed as 'reversed'. (PR #1786 - Author @jonnycornwell)

@turf/difference

No longer publishes an .mjs file.

@turf/meta

No longer publishes an .mjs file.

@turf/tag

Add MultiPolygon support. (PR #1996 - Author bryceroney)

🐛 Bug Fixes

🏅 New Features/Enhancements

📖 Documentation

⚠️ Breaking Change

5.0.0 🎉

⭐️ Major Updates

  • TurfJS now supports ES Modules (Related PR's)
  • Optional parameters are now defined as an Object.

🚀 New Modules

@turf/voronoi

Takes a FeatureCollection of points, and a bounding box, and returns a FeatureCollection of Voronoi polygons. (PR #1043 - Author @stevage)

@turf/shortest-path

Returns the shortest path from start to end without colliding with any feature in obstacles (PR #956 - Author @stebogit)

@turf/boolean-parallel

Boolean-Parallel returns True if each segment of line1 is parallel to the correspondent segment of line2 (PR #941 - Author @stebogit)

@turf/nearest-point-on-line

Takes a {@link Point} and a {@link LineString} and calculates the closest Point on the (Multi)LineString. (PR #939 - Author @stebogit)

🏅 New Features/Enhancements

🐛 Bug Fixes

⚠️ Breaking Change

  • Optional parameters are now defined as an Object:

Before

var from = [-75.343, 39.984];
var to = [-75.534, 39.123];
var units = 'miles';
var distance = turf.distance(from, to, units);

After

var from = [-75.343, 39.984];
var to = [-75.534, 39.123];
var options = {units: 'miles'};
var distance = turf.distance(from, to, options);

4.7.0

🚀 New Modules

@turf/projection

  • toMercator: Converts a WGS84 GeoJSON object into Mercator (EPSG:900913) projection
  • toWgs84: Converts a Mercator (EPSG:900913) GeoJSON object into WGS84 projection

(PR #927 - Author @stebogit)

@turf/point-to-line-distance

Returns the minimum distance between a {@link Point} and a {@link LineString}, being the distance from a line the minimum distance between the point and any segment of the LineString.

(PR #925 - Author @stebogit)

@turf/boolean-within

Boolean-within returns true if the first geometry is completely within the second geometry. The interiors of both geometries must intersect and, the interior and boundary of the primary (geometry a) must not intersect the exterior of the secondary (geometry b). Boolean-within returns the exact opposite result of the @turf/boolean-contains.

(PR #924 - Author @rowanwins)

🏅 New Features/Enhancements

  • Updates @turf/unkink-polygon testing & added flattenEach instead of using flatten. (PR #889)
  • @turf/concave refactoring, replacing @turf/union with geojson-dissolve to increase speed and added support to null geometries (PR #907 - Contributor @stebogit @DenisCarriere)
  • Adds doc note on @turf/polygonize about "Edges must be correctly noded" (PR #898 - Contributor @stebogit @NickCis)
  • Adds support to foreign Members to @turf/clone (PR #904 - Contributor @DenisCarriere)
  • Extends support of any GeoJSON to @turf/simplify (PR #903 - Contributor @DenisCarriere @stebogit)
  • Adds new isNumber function and improves type checking for few @turf/helpers methods (PR #920 - Contributor @DenisCarriere @stebogit)
  • Adds throw errors to invalid MultiPolygons for @turf/simplify (PR #922 - Contributor @DenisCarriere)

🐛 Bug Fixes

4.6.0

🚀 New Modules

🏅 New Features/Enhancements

  • Sets centered param default to true in @turf/point-grid (PR #836 - Contributor @stebogit)
  • Adds MultiLineString support for @turf/point-on-line (PR #838 - Contributor @stebogit)
  • Renames @turf/clusters => @turf/clusters-kmeans, plus adds deprecated warning message to @turf/clusters@4.5.2 (See Issue #845)
  • Changes output type of @turf/clusters-kmeans (See Issue #850 - Contributor @DenisCarriere)
  • Adds segmentEach and segmentReduce functions to @turf/meta (See Issue #850 - Contributor @DenisCarriere)
  • Adds tests and linting on JSDoc in TurfJS core from turf-www; see Issue #859 (PR #857 + #864 + #870 - Contributor @DenisCarriere @stebogit)
  • Introduces null Geometry support across TurfJS modules (See Issue #853) (PR #866 - Contributor @DenisCarriere)
  • Includes feature(Sub)Index in coordEach/coordReduce (@turf/meta) 🎉 (PR #872 - Contributor @DenisCarriere)
  • Adds bbox and id params plus geometry method to @turf/helpers (PR #877 - Contributor @DenisCarriere)

🐛 Bug Fixes

  • Applies @turf/truncate to @turf/line-split splitter input to avoid approximation errors. Fixed #852 (PR #855)
  • Fixes @turf-mask error (See Issue #837) (PR #865 - Contributor @thiagoxvo)
  • Fixes create-new-module script error on LICENSE file creation (See Issue #861) (commit df6986e)
  • Fixes @turf/isobands error on commonProperties (See Issue #831) (commit 1663f07)

4.5.0

🚀 New Modules

  • @turf/clusters Takes a set of points and partition them into clusters using the k-means clustering algorithm. (PR #787 - Author @stebogit )

  • @turf/boolean-disjoint Boolean-disjoint returns (TRUE) if the intersection of the two geometries is an empty set. (PR #805 - Author @rowanwins)

  • @turf/boolean-contains Boolean-contains returns True if the second geometry is completely contained by the first geometry. The interiors of both geometries must intersect and, the interior and boundary of the secondary (geometry b) must not intersect the exterior of the primary (geometry a). Boolean-contains returns the exact opposite result of the @turf/boolean-within. (PR #797 - Author @rowanwins)

  • @turf/boolean-crosses Boolean-Crosses returns True if the intersection results in a geometry whose dimension is one less than the maximum dimension of the two source geometries and the intersection set is interior to both source geometries. Boolean-Crosses returns t (TRUE) for only multipoint/polygon, multipoint/linestring, linestring/linestring, linestring/polygon, and linestring/multipolygon comparisons. (PR #796 - Author @rowanwins)

  • @turf/boolean-clockwise Takes a ring and return true or false whether or not the ring is clockwise or counter-clockwise. (PR #789 - Authors @morganherlocker @stebogit)

  • @turf/clone Prevents GeoJSON coordinates from being mutated, similar to JSON.parse(JSON.stringify(geojson)). Only cloning the coordinates can be 3x-20x faster than the parse + stringify approach. (PR #824 - Author @DenisCarriere)

🏅 New Features/Enhancements

  • convertArea Converts a area to the requested unit. (PR #821 - Author @wnordmann)
  • Adds mask option to @turf/point-grid (PR #791)
  • New @turf/isolines based on MarchingSquares.js (PR #781)
  • Use ES6 modules / Add module.js to @turf/turf (PR #793)
  • Create-new-module script (PR #823)

🐛 Bug Fixes

  • Buffer - Drop circle buffer operation (PR #786)
  • Fixes @turf/idw bad property name #774 (PR #800)
  • Fix for @turf/polygon-tangents - Resolves #785 (PR #792)

4.4.0

🚀 New Modules

  • @turf/line-offset Adds a new lineOffset module as per this issue. Basically takes an input line and returns a new line offset by the distance. (PR #729 - Author @rowanwins)
  • @turf/polygonize Polygonizes (Multi)LineString(s) into Polygons. Implementation of GEOSPolygonize function (geos::operation::polygonize::Polygonizer). (PR #767 - Author @NickCis)
  • @turf/transform-rotate Rotates any geojson Feature or Geometry of a specified angle, around its centroid or a given pivot point; all rotations follow the right-hand rule. (Issue #747 - Author @stebogit)
  • @turf/transform-translate Moves any geojson Feature or Geometry of a specified distance along a Rhumb Line on the provided direction angle. (Issue #747 - Author @stebogit)
  • @turf/transform-scale Scale a GeoJSON from a given point by a factor of scaling (ex: factor=2 would make the GeoJSON 200% larger). If a FeatureCollection is provided, the origin point will be calculated based on each individual Feature. (Issue #747 - Author @stebogit)

🏅 New Features

🐛 Bug Fixes

4.3.0

🚀 New Modules

🏅 New Features

🐛 Bug Fixes

4.2.0

New Modules

Enhancements

Bug Fixes

Changes

Documentation

4.1.0

New Modules

Enhancements

Bug Fixes

3.6.4

Typescript definitions index.d.ts added to all the packages.

3.0.11

Fix turf-line-slice bug with vertical linestrings.

3.0.1

This is a big change in Turf! 3.0.0 is a release that targets the development cycle of Turf, letting us work on it more and release more often.

Monorepo

Turf 3.x and forward is a monorepo project. We publish lots of little modules as usual, but there's one repo - turfjs/turf - that contains all the code and the issues for the Turf source code. We use lerna to link these packages together and make sure they work.

Why? We already had internal turf modules, like turf-meta, and development was harder and harder - we had a bunch of custom scripts to do releases and tests, and these were just written for Turf. Lerna is from the very popular and very well-maintained babel project, and it works really well, and reduces maintainer sadness.

Simplicity

Turf grew a bunch of modules that weren't totally necessary, or were expressing only a line or two of JavaScript. We want to make things easier, but these modules didn't make code more expressive and they hid complexity where it didn't need to be hidden. Turf 3.x focuses on the core functionalities we need, making sure they're tested and performant.

turf-erase has been renamed turf-difference to make its name more similar to the equivalents in other libraries.

Removed modules: merge, sum, min, max, average, median, variance, deviation, filter, remove, jenks, quantile. See the upgrade guide below for replacements.

Upgrading from v2

If you were using turf-merge

turf-merge repeatedly called turf-union on an array of polygons. Here's how to implement the same thing without the special module

var clone = require('clone');
var union = require('turf-union');
function merge(polygons) {
  var merged = clone(polygons.features[0]), features = polygons.features;
  for (var i = 0, len = features.length; i < len; i++) {
    var poly = features[i];
    if (poly.geometry) merged = union(merged, poly);
  }
  return merged;
}

An alternative method that merges pairs of features recursively. With large numbers and similar complexity of input geometries this can speed up run time by factor 10. Choose depending on your use case.

var union = require('turf-union');
function mergeBin(polygons) {
  var features = polygons.features;

  do {
    var merged = [], len = features.length;
    for (var i = 0; i < len-1; i += 2) {
      merged.push(turf.union(features[i], features[i+1]));
    }
    if (len % 2 !== 0) {
      merged.push(features[len-1]);
    }
    features = merged;
  } while(features.length > 1);

  return features[0];
}

If you were using turf-sum, min, max, average, median, variance, deviation

The turf-collect method provides the core of these statistical methods and lets you bring your own statistical library, like simple-statistics, science.js, or others.

For example, here's how to find the median of matched values with simple-statistics. Finding other statistics, like variance, mean, and so on simply use other methods from the statistics library.

var ss = require('simple-statistics');
var turf = require('@turf/turf');

var poly1 = turf.polygon([[[0,0],[10,0],[10,10],[0,10],[0,0]]]);
var poly2 = turf.polygon([[[10,0],[20,10],[20,20],[20,0],[10,0]]]);
var polyFC = turf.featureCollection([poly1, poly2]);
var pt1 = turf.point([5,5], {population: 200});
var pt2 = turf.point([1,3], {population: 600});
var pt3 = turf.point([14,2], {population: 100});
var pt4 = turf.point([13,1], {population: 200});
var pt5 = turf.point([19,7], {population: 300});
var ptFC = turf.featureCollection([pt1, pt2, pt3, pt4, pt5]);

// collects values from matching points into an array called 'values'
var collected = turf.collect(polyFC, ptFC, 'population', 'values');

// finds the median of those values.
collected.features.forEach(function (feature) {
  feature.properties.median = ss.median(feature.properties.values);
});

console.log(JSON.stringify(collected, null, 2));

If you were using turf-filter, turf-remove

These modules were thin wrappers around native JavaScript methods: use Array.filter instead:

var filteredFeatures = features.filter(function(feature) {
  return feature.properties.value > 10;
});

If you were using turf-jenks, turf-quantile

Use Array.map to get values, and then bring your own statistical calculation, like simple-statistics or science.js.

var values = features.map(function(feature) {
  return feature.properties.value;
});

If you were using turf-extent

turf-extent's name was changed to turf-bbox. It is functionally the same.

turf.bbox(poly) // [minx, miny, maxx, maxy]

2.0.0

  • turf-grid renamed turf-point-grid (turf.grid => turf.pointGrid)
  • turf-hex renamed turf-hex-grid (turf.hex => turf.hexGrid)
  • turf-hex-grid now has a required unit parameter
  • remove turf-isobands; use turf-isolines instead
  • added turf-square-grid (turf.squareGrid)
  • added turf-triangle-grid (turf.triangleGrid)
  • constrain turf-point-grid to the bbox

1.4.0

  • update all module dependencies to master
  • add support for features in turf.intersection
  • fix issues with turf.polygon coordinate wrapping inconsistencies
  • add unit parameter to turf.concave

1.3.5

  • harmonize turf-tin dependency tree

1.3.4

  • fixes bug in turf-along

1.3.3

  • added turf-line-slice for segmenting LineStrings with Points
  • turf-point-on-line for calculating the closest Point from a Point to a LineString

1.3.2

  • tin ~7x faster
  • Fix mutability issues with flip, erase: data passed to Turf should never be changed in place.
  • added turf-line-distance for geodesic measuring of LineStrings
  • added turf-along for calculating a the location of a Point x distance along a LineString
  • added turf-area for calculating the area of a given feature