Turf merge polygons. See the upgrade guide below for replacements.

Turf merge polygons The Voronoi algorithim used comes from the d3-voronoi package. 将Point、LineString或Polygon的FeatureCollection组合成MultiPoint、MultiLineString或MultiPolygon The function has 2 parameters: fc (required): A GeoJSON FeatureCollection containing polygons to merge (make sure the polygons are valid). merge polygons. But, I'm able to do it with 2 polygons only. bbox? Dec 31, 2024 · combine Description Combines a FeatureCollection of Point , LineString , or Polygon features into MultiPoint , MultiLineString , or MultiPolygon features. Dec 31, 2024 · Returns . Combines a FeatureCollection of point, linestring, or polygon Features into multipoint, multilinestring, or multipolygon Features. Use negative buffer for the union and shrink it. This is what I did so far But seems it doesn't work well because I need to Nov 29, 2021 · The example you've suggested merges the polygons when the map is loaded, is it possible to capture when a user has finished drawing a shape and then check if any polgons overlap, then merge these polygons together to form 1 polygon? Removed modules: merge, sum, min, max, average, median, variance, deviation, filter, remove, jenks, quantile. I then want to merge all these polygons together to get a composite polygon. Copy Ensure you're using the healthiest npm packages Dec 31, 2024 · Name Type Description; coordinates: Array<Array<Array<Array<number>>>> an array of Polygon coordinates: properties?: Object: an Object of key-value pairs to add as properties (default {}): options? Dec 31, 2024 · Name Type Description; coordinates: UNCERTAIN: properties?: GeoJsonProperties: an Object of key-value pairs to add as properties (default {}): options?: Object: Optional Parameters (default {}): options. Wh Dec 2, 2022 · Turf. Jul 28, 2020 · npm install @turf/combine 接收一个 type 为 Point 、LineString 、Polygon 的要素集(FeatureCollection)，组合成 type 为 MultiPoint 、MultiLineString 、MultiPolygon 的单一要素并返回 值得注意的是，当入参要素集存在不同类型的要素时，返回的要素不是单一 Dec 2, 2022 · Takes two or more polygons and returns a combined polygon. 25, "miles" ); The buffer result only seems to have incorporated a fraction of the points. st_union seems appropriate only for aggregating together Sep 25, 2024 · 💡 Power your products with our high‑quality polygons, available in GeoJSON, Shapefile, KML, ASC, DAT, CSV, and GML formats. In that case I think you can simply either create a feature collection from a set of features using the featureCollection helper (@turf/helpers) or Sep 26, 2017 · I need to merge polygons that are in close vicinity to each other. Transformation Sep 3, 2024 · GeoJSON Merge 使用教程 geojson-mergeMerge multiple GeoJSON files into one FeatureCollection. merge and (edited) the extension turf-overlaps. This sample uses the open source Turf. That is just two points. draw#131). union for a while without problems until today. 获取两个或多个多边形，并返 turf. Jul 13, 2021 · 本文介绍了如何基于Turf 实现多边形的拆分及合并。 背景介绍 多边形的拆分合并 多边形的拆分是指将多边形沿着线切分为几个多边形。如下图所示，不仅可以沿线一分为二，当线与多边形有多段相交时也可以分为多份，另外当多边形带洞（环 Jan 21, 2019 · I'm using OpenLayers and give some try on Turf. Increasing the number of iterations can improve the results, but it will also prolong the execution time. You can use Copy to Clipboard button to copy Dec 3, 2023 · merge polygons. 0, last published: 25 days ago. However, if the polygons create a hole, turf returns a nothing feature. MultiPolygon)> | null) a combined polygon or multi-polygon feature, or null if there were no input polygons to combine. var clone = require ('clone'); var union = require ('turf-union'); function merge (polygons) {var merged = Feb 8, 2023 · 🌐 Combine Polygons in Spatial Data: Select Spatial Format: Map Bounding Box: Map View: 📂: X Field: Dec 31, 2024 · This is documentation for Turf. A separate file contains all possible US census tract polygons. Turf can be added to your website as a client-side plugin, or you can run Turf server-side with Node. 260691], {species: 'birch'}), turf. Merging properties involves a lot of subjective logic for handling how the properties get merged. 将(多个)LineString多边形化。接收一个 type 为LineString或MultiLineString的要素，转换为type为Polygon的面要素集合 值得注意的是，lineToPolygon 方法返回要素，该方法返回要素集，且不能传入 options 的属性。 Jan 16, 2025 · If you're yet in TurfJS version 6, the spread operator does not work because as docs mention, turf. 2. I've an array with several GeoJSON string and I want to merge them all. 1. Here's how to implement the same thing without the special module. Include the name of the package modified. Latest version: 1. js完成大部分的基础计算。Turf是由mapbox推出的空间几何计算库，常用于地理空间内的几何关系分析，功能非常强大，具体功能可见Turf. 4,520 4 4 gold badges 41 41 silver badges 60 60 bronze badges. reduce, but it is CPU intensive. If they do not share any area, returns null. merge(fc) Takes a set of Polygon|polygons and returns a single merged polygon feature. I'd recommend using jsts directly if you want that support. Feb 28, 2014 · Using leaflet/leaflet. Start using @turf/combine in your project by running `npm i @turf/combine`. turf. 1 star Watchers. Dec 31, 2024 · Name Type Description; coordinates: Array<Array<Array<Array<number>>>> an array of Polygons: properties?: Object: an Object of key-value pairs to add as properties (default {}): options? Nov 27, 2017 · Going to close this issue for now since @turf/intersect won't be worked on until we drop jsts as a dependency. featurecollection([ turf. Uses simplepolygon internally. js (see below). bbox? Jul 2, 2024 · turf combine module. js 中文文档 首页 文档 英文网 (opens new window) 相关 相关 vuepress (opens new window 结合(combine) 拆分多边形为点(explode) 减少嵌套层级(flatten) 多段线转换为多边形(lineToPolygon) 多边形化(polygonize) 多边形转换多段线(polygonToLine) misc I think this should be separate from Turf. Latest version published 9 years ago. In such a case turf. In particular, turf. Readme License. I then want to add up how many buffers overlap. Consider the following screenshot: I want the user to select both polygons and then merge them when clicking on a button, so something like this is returned (the area in between would be filled and all of it would be one large polygon): 1 day ago · Contribute to Turfjs/turf-union development by creating an account on GitHub. union combines two different polygons into a new one. npmjs. The outp turf-union in all its docs mentions the union of only two (multi)polygons or geojson's https://www. It is maintained in the Turfjs/turf repository, where you can create PRs and issues. js 中文文档 首页 文档 英文网 (opens new window) 相关 相关 vuepress (opens new window 结合(combine) 拆分多边形为点(explode) 减少嵌套层级(flatten) 多段线转换为多边形(lineToPolygon) 多边形化(polygonize) 多边形转换多段线(polygonToLine) misc Oct 23, 2019 · Perhaps @turf/dissolve is right way instead. com/package/@turf/union It would be nice and useful if we Dec 31, 2024 · Turf is a JavaScript library for spatial analysis. js instead of tools such as QGIS and ArcGIS due to less hassle involved in setups and installations. 2 watching Forks. Examples Removed modules: merge, sum, min, max, average, median, variance, deviation, filter, remove, jenks, quantile. You can check the new feature on geojson. 0. js 进行多边形合并时，遇到一 Oct 17, 2021 · For starters, I personally use this functionality in the Turf. js library for churning out the 3 primary boundaries officially used by the land planners in the country, Singapore — (1) Subzone, (2) Planning Area & (3) Region which Mar 5, 2025 · Returns (Feature < (Polygon | MultiPolygon)> | null) a combined polygon or multi-polygon feature, or null if there were no input polygons to combine. Commented Jul 4, 2013 at 11:06. js for geo calculations. reduce((a, b) => turf. intersect(features); return intersection; } Dec 31, 2024 · combine Description Combines a FeatureCollection of Point , LineString , or Polygon features into MultiPoint , MultiLineString , or MultiPolygon features. This is particularly useful for tasks like simplifying Dec 31, 2024 · combine Description Combines a FeatureCollection of Point , LineString , or Polygon features into MultiPoint , MultiLineString , or MultiPolygon features. Parameters 不难发现，多边形的拆分合并中会有大量且复杂的几何计算，包括点、线、面相互之间的相交、包含等计算。不过我们并不需要造轮子，可以使用Turf. If the input polygons are not contiguous, this function returns a multi-polygon feature. You can use Default OpenLayers Countries source or enter your special geojson source url to fetch. You need to add feature names with comma seperated. In contrast, PolyUnion completed the same task in about 350 milliseconds. 0 union Description Takes a collection of input polygons and returns a combined polygon. Start using turf-merge in your project by running `npm i turf-merge`. There are 26 other projects in the npm registry using @turf/combine. Developer Tools Snyk Learn Snyk Advisor Code Checker About Snyk Snyk Vulnerability Database; npm; turf-merge; turf-merge vulnerabilities merge polygons latest Hello! I've been using turf. Dec 31, 2024 · Name Type Description; coordinates: UNCERTAIN: properties?: GeoJsonProperties: an Object of key-value pairs to add as properties (default {}): options?: Object: Optional Parameters (default {}): options. or null if there were no input polygons to Removed modules: merge, sum, min, max, average, median, variance, deviation, filter, remove, jenks, quantile. – user19746. Combines a FeatureCollection of Point, LineString, or Polygon features into MultiPoint, MultiLineString, or MultiPolygon features. js 是由Mapbox提供的一个控件分析库，非常适合WebGIS开发者使用，里面有丰富的空间分析与计算 函数 、数据转换函数。 最近在使用 turf. It works as you understand but the intersecting polygons become a single polygon. 0, which is no longer actively maintained. merge polygons For more information about how to use this package see README. If the input polygons are not contiguous, this function returns a MultiPolygon feature. js offers several functions to combine features, such as turf. NPM. Something like this might get you most of the way there: var poly = <geoJSONPolygon>; var grid = turf. union(a, b), polygons[0]) Dec 2, 2022 · > npm install @turf/combine Combines a FeatureCollection of Point , LineString , or Polygon features into MultiPoint , MultiLineString , or MultiPolygon features. When you use this tool, consider Dec 31, 2024 · Returns . union only accepts two parameters turf. GitHub. 260875], {species: 'oak'}), turf. You can then simply do the multi-part to single-part operation and you then Dec 31, 2024 · unkinkPolygon Description . draw has a way to not allow intersections but it currently works when initially drawing a polygon but not when editing one (Leaflet/Leaflet. Contribute to Turfjs/turf-union development by creating an account on GitHub. bbox? This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. Returns FeatureCollection < (MultiPoint | Dec 31, 2024 · Takes a collection of input polygons and returns a combined polygon. Contributors Apr 11, 2023 · 此外，提到了turf. intersect returns null value, but turf. Start using @turf/union in your project by running `npm i @turf/union`. j Dec 2, 2022 · Takes two or more polygons and returns a combined polygon. ). There was a suggestion in the previous issue to use the vertexes and measure the distance to those, but we end up with the following issue: Feb 10, 2015 · I tried using turf-buffer to get a buffer around a FeatureCollection of about 1800 points: var buffered = turf. Flat end cap and mitre join with quite a high limit are good settings. Removed modules: merge, sum, min, max, average, median, variance, deviation, filter, remove, jenks, quantile. edit - using @turf/union, mistakenly called "merge" Oct 17, 2021 · In most of my Geographic Information Systems (GIS) projects, when it comes to performing certain data transformations on spatial datasets for subsequent spatial analyses, I tend to turn to open-sourced utilities such as Turf. Warning: may create degenerate polygons. Parameters Sep 19, 2024 · Merge two polygons together This sample shows how to merge (union) two polygons together to create a single polygon object. I use the turf. find the union of geographic features. A hole is treated as the exterior of the polygon. 0 ). leaflet. 0 forks Report repository Jan 4, 2022 · @Isaac-Leonard I don't think you can merge GeoJSON objects other than FeatureCollections as you suggested (I can't think of an obvious/standard way of merging two polygons or a line and a polygon 🤔 ). 项目地址:https: Turf. See the upgrade guide below for replacements. Currently there is no native way to achieve distance to Polygon (and Multi-Polygon) from a point using Turf. Turf intersect doesn't always work with polygons. Upgrading from v2. Here's how to implement the same thing without the special module May 20, 2020 · JavaScript API GL近期为支持物流行业实现了几何图形编辑器，用户可通过编辑器接口进行点、线、面、圆的绘制和编辑。在物流行业中常见的使用场景是配送区域及地理围栏的绘制，常会有对已有区域进行拆分或者合并的需要，所以编辑器也提供了相应的功能。本文介绍了如何基于Turf实现多边形的拆分 The example you've suggested merges the polygons when the map is loaded, is it possible to capture when a user has finished drawing a shape and then check if any polgons overlap, then merge these polygons together to form 1 polygon? Dec 2, 2022 · Smooths a Polygon (opens new window) or MultiPolygon (opens new window). io editor. There are 2 other projects in the npm registry using turf-merge. Note that MultiPolygon features within the collection are not supported. For up-to-date documentation, see the latest version ( 7. FeatureCollection <MultiPoint | MultiLineString | MultiPolygon> a FeatureCollection of corresponding type to input. MIT license Activity. Tests $ npm test. Parameters If you were using turf-merge. Buffer the polygons so much that they overlap and make a union. Here's how to implement the same thing without the special module Dec 31, 2024 · Name Type Description; coordinates: Array<Array<Array<Array<number>>>> an array of Polygons: properties?: Object: an Object of key-value pairs to add as properties (default {}): options? Nov 24, 2023 · merge polygons. Dec 31, 2024 · Name Type Description; lines: FeatureCollection | Feature<LineString | MultiLineString>: Features to convert: options?: Object: Optional parameters (default turf-merge; turf-merge v1. Here's how to implement the same thing without the special module Jan 15, 2025 · I have already one feature with multiple polygons. for example: after every 2 zoom levels, I want to aggregate 2 adjacent polygons into one, where the inhabitant number of the new polygon is the addition of the volumes of the previous 2 aggregated polygons. booleanOverlap returns true. js库的filter功能用于GeoJSON特征属性过滤，还讨论了其他过滤和图形处理的npm包，如feature-filter和geojson-dissolve merge-simple-polygons ：merge-simple-polygons - npm Merge two (adjacent) simple polygons into another simple polygon Dec 31, 2024 · Name Type Description; coordinates: Array<Array<Array<Array<number>>>> an array of Polygon coordinates: properties?: Object: an Object of key-value pairs to add as properties (default {}): options? Dec 31, 2024 · Name Type Description; coordinates: UNCERTAIN: properties?: GeoJsonProperties: an Object of key-value pairs to add as properties (default {}): options?: Object: Optional Parameters (default {}): options. const polygons = [poly1, poly2, poly3, , polyn] const union = polygons. Apr 9, 2023 · var features = turf. turf-merge repeatedly called turf-union on an array of polygons. ; totalPasses (optional, defaults to 3): The total number of passes for recursive calls. $ npm install turf-combine. 2, last published: 9 years ago. js Next version. Polygonizes a set of lines that represents edges Mar 5, 2025 · turf union module. Jul 2, 2024 · Combines a FeatureCollection of Point, LineString, or Polygon features into MultiPoint, MultiLineString, or MultiPolygon features. (Below an example of just one element of my array that Mar 6, 2023 · To test: Just click Merge button. Chau. This can be done as a single operation with OpenJUMP. Feb 13, 2023 · You can combine turf. A workaround is to use Array. js, which should give you the geospatial capabilities to do what you need in browser. Dissolves a FeatureCollection of Polygon features, filtered by an optional property name:value. Perhaps there is an option to pass to union or another turf function to correctly make the donut. squareGrid(turf. union method and do not have any problems creating a single Polygon/MultiPolygon. I want to merge these polygons each time user clicks on a new one. I can think of a dozen equally valid ways to merge a set of properties, which means it's probably not a good idea to set one as a default (ie: aggregate the properties, only use the properties from poly1, concat properties as suggested here, etc. I found that there is a method called turf. js, but with no result. Once you click on Merge button tool will create a new feature. Dec 31, 2024 · polygonize Description . prototype. Dec 2, 2022 · Turf. The geometry type will match what was passsed in. js：一个用于空间分析的 JavaScript 库，可以与 GeoJSON 数据一起使用。Tippecanoe：用于将大量 GeoJSON 数据转换为矢量切片的 Dec 31, 2024 · Name Type Description; coordinates: Array<Array<Array<Array<number>>>> an array of Polygon coordinates: properties?: Object: an Object of key-value pairs to add as properties (default {}): options? Oct 8, 2020 · I have several polygonal areas that i successfully turn into turf. Returns Jun 30, 2021 · turf. Hopefully, someone who reads this recognizes the problem and give a quick answer, but if not I will follow up with an example GeoJSON and snippet. 570018, 44. About. point May 22, 2015 · Modules. js library to for some of the spatial calculation. geojson"] -d, --maxDistance distance in kilometers to consider polygons belonging to the same group [number] [default : 4] -e, --maxEdge the length (in 'units') of an edge necessary for part of the hull to become concave. Returns negative values for points inside the polygon. Run npm test at the sub modules where changes have occurred. Turf. 获取两个或多个多边形，并返回一个组合多边形。 Saved searches Use saved searches to filter your results more quickly Saved searches Use saved searches to filter your results more quickly Oct 19, 2020 · I'm working on a website with a Cesium map, and I'm using turf. Takes two Dec 2, 2022 · Polygonizes (Multi)LineString(s) into Polygons. js: Turf. This module is part of the Jan 17, 2025 · Is there a Turf operation to merge two FeatureCollections in this way? I can't see such a thing. point([-72. Latest version: 7. Stars. Handles polygons with holes and multi-polygons. The gaps between the polygons have disappeared but the union is too large. buffer( points, 0. Custom properties. Have read How To Contribute. 0, last published: 2 months ago. Improve this question. Resources. For up-to-date documentation, see the latest version (7. Takes a collection of points and a bounding box, and returns a collection of Voronoi polygons. In GIS parlance, I think it's called multipart to single part image from ArcGIS Desktop docs. bbox? Dec 31, 2024 · dissolve Description . Dec 31, 2024 · voronoi Description . draw I can create polygons that intersect themselves. If the input polygon features are not contiguous, this function returns a MultiPolygon feature. Oct 17, 2021 · Saved searches Use saved searches to filter your results more quickly Aug 14, 2019 · Opened new issue as requested by @rowanwins from #252. Here's how to implement the same thing without the special module Sep 27, 2024 · The Merge tool combines two or more line or polygon features on the same layer into one feature. Based on Chaikin's algorithm . union that is able to merge polygons. The code looks as following: import * as turf from '@turf/turf'; export function createIntersection(features) { // features = 3 polygons on the screen bellow const intersection = turf. It includes traditional spatial operations, helper functions for creating GeoJSON data, and data classification and statistics tools. js 7. This module is part of the Turfjs project, an open source module Apr 9, 2023 · var features = turf. point Jan 18, 2025 · Meaning I want a given respondent’s census tract polygon to be merged with all the polygons touching its borders. intersect and turf. Here's how to implement the same thing without the special module When attempting to merge approximately 1000 circle-shaped polygons using only @turf/union, it took approximately 25 seconds. 获取两个或多个多边形，并返回一个组合多边形。如果输入的多边形不是连续的，这个函数将返回一个MultiPolygon Apr 9, 2023 · geojson-merge，多个文GeoJSON文件合并为一个。GeoJSON 里面的点线面合并为Multi(point linestring polygon)。GeoJSON一feature，根据properties属性过滤出想要的图形。merge-simple-polygons。合并多边形。其实 Dec 21, 2015 · Is it possible to combine / union multiple vector polygons using Turf. This tool is available in the Modify Features pane. Follow edited Feb 8, 2012 at 9:54. Run npm run lint Nov 18, 2020 · I need to create intersection objects if I have 2 or more polygons. combine() which can merge multiple geometries into a single FeatureCollection. . I need to find a way to merge a large set of points on the map (with a fixed distance between them) to polygons, by a certain property. Feature | null returns a feature representing the area they share (either a Polygon or MultiPolygon). I want to merge the intersecting polygons so I have 4 polygons in the end instead of 5. 1. Polygons. For steps to merge m-aware line features, see Create a complex route by merging. If I manually buffer EACH point feature individually, and then merge all the resulting polygons, it does incorporate them all: Learn more about known vulnerabilities in the turf-merge package. A GeoJSON FeatureCollection containing polygons to merge (make sure the polygons are valid). Polygonizes (Multi)LineString(s) into Polygons. Given a multipolygon, return multiple features with single polygons. Dec 31, 2024 · Combines a FeatureCollection of Point, LineString, or Polygon features into MultiPoint, MultiLineString, or MultiPolygon features. FeatureCollection<Point | MultiPoint> Point(s) or MultiPoint(s) with positions that land within at least one polygon. Parameters. License: ISC. Parameters Jun 29, 2017 · I want to merge polygons as I zoom out. 581777, 44. booleanOverlap methods to detect if two polygons only have common border but no common area. Here's how to implement the same thing without the special module Aug 23, 2017 · I am working on a case now, in which the user can select 2 or more polygons on the map. js and add up the number of intersecting polygons? For example, I might buffer 3 points and create 3 polygons. Due to how commonplace the question How Options : -i, --input Input path of geojson file [string] [requis] -o, --output Output path of geojson file [string] [default : "output. parameter type description; fc: Jan 17, 2023 · Takes two or more polygons and returns a combined polygon. Nov 22, 2018 · turf-combine. Dec 31, 2024 · Name Type Description; coordinates: Array<Array<Array<number>>> an array of LinearRings: properties?: Object: an Object of key-value pairs to add as properties (default {}): options? Dec 31, 2024 · Calculates the distance from a point to the edges of a polygon or multi-polygon. @Knight219 Also, @turf/intersect does officially support other Geometry formats other than Polygon. 基于 Chaikin 算法平滑多边形(Polygon)或多多边形(MultiPolygon)。 注意:可能会创建退化多边形 Dec 31, 2024 · This is unreleased documentation for Turf. Feb 5, 2016 · Check out turf. Hot Network Questions Interesting unusual usage of a participle turf. union(poly1, poly2). extent(poly), cellWidth, unit); var Removed modules: merge, sum, min, max, average, median, variance, deviation, filter, remove, jenks, quantile. squareGrid and turf. If you were using turf-merge. As you can see here, there's a polygon linking the fi Feb 8, 2012 · How can I merge the two polygons into one using OpenLayers? openlayers-2; polygon; Share. Takes a kinked polygon and returns a feature collection of polygons that have no kinks. You can select and merge features into an existing feature or into a new feature with a new Object ID. parameter type description; fc: May 16, 2016 · Original polygons. I'm using union to merge a bunch of circles and a bunch of polygons together to create an uncertainty zone. Aggregation, Measurement, Transformation, Interpolation, Classification, Joins, Types, and Helpers Use a meaningful title for the pull request. Implementation of GEOSPolygonize function (geos::operation::polygonize::Polygonizer). ivsug lra psxjd wzohmuhg zcueycx dlxfuyd zrwglu jjyi nreqos vwyke khm phsm ffbzu ewc tyzbv