turf | A modular geospatial engine written in JavaScript | Map library

 by   Turfjs JavaScript Version: v6.5.0 License: MIT

kandi X-RAY | turf Summary

kandi X-RAY | turf Summary

turf is a JavaScript library typically used in Geo, Map applications. turf has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.

A modular geospatial engine written in JavaScript

            kandi-support Support

              turf has a medium active ecosystem.
              It has 8064 star(s) with 873 fork(s). There are 185 watchers for this library.
              It had no major release in the last 12 months.
              There are 261 open issues and 1276 have been closed. On average issues are closed in 38 days. There are 24 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of turf is v6.5.0

            kandi-Quality Quality

              turf has 0 bugs and 0 code smells.

            kandi-Security Security

              turf has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              turf code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              turf is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              turf releases are available to install and integrate.
              Deployable package is available in Maven.
              Installation instructions are not available. Examples and code snippets are available.
              It has 50 lines of code, 0 functions and 426 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed turf and discovered the below as its top functions. This is intended to give you an instant insight into turf implemented functionality, and help decide if they suit your requirements.
            • Computes the band .
            • a helper function to walk out to cell coordinates
            • Returns the exit coordinate of a cell
            • determine the start position of a cell
            • Iterates over the GeoJSON objects and adds them to the array
            • Draws a trace path in the graph .
            • Iterates over the GeoJSON objects and adds them to the array
            • Computes the contour of the given data .
            • Convert grid of grid to path coordinates .
            • Finds a segment of a provided JSON .
            Get all kandi verified functions for this library.

            turf Key Features

            No Key Features are available at this moment for turf.

            turf Examples and Code Snippets

            No Code Snippets are available at this moment for turf.

            Community Discussions


            Convert XML having multiple for-each case to CSV
            Asked 2022-Mar-25 at 18:51

            I have written a Java Program that converts XML to CSV. But currently it is converting partial only.



            Answered 2022-Jan-22 at 22:25

            I guess the inner should be . And concat(AREANAME,',',DEAFAULT should be concat(AREANAME,',',DEFAULT.

            Source https://stackoverflow.com/questions/68605295


            The Route line is not showing in android by using FeatureCollection
            Asked 2022-Mar-07 at 06:57

            I need your help in little bit query, i'm trying to render the multiple polyline on a single map,it look like as it (IOS), it perfectly fine work fine in IOS but not work in android, so my code Snippet it,



            Answered 2022-Mar-07 at 06:57

            After a lot a effort i got the Solution Sometime undefined and null is generate default Therefor route line not render on android, but ios it will handle it by default So

            Source https://stackoverflow.com/questions/70618184


            Setting data to Firebase Causing My app to restart constantly with no Error in Logical
            Asked 2022-Mar-06 at 03:20

            I have been developing this app since 2019 and I had a released version of it and I was working on an update so there is a new version of the Android Studio came out I have updated Android Studio to Android Studio Bumblebee | 2021.1.1 Patch 1 my kotlin_version = "1.6.10" and compileSdk 31 minSdkVersion 19, targetSdkVersion 31 android 11

            I was solving some errors at the beginning like duplicate classes and stuff until I faced this error with firebase when setting the data to firebase Database or Firestore, before this update my Code was working fine and I didn't change much I just added new functions to the app like inAppReview,

            what is happening is that whenever I'm setting data or update some existing data in Firebase Databse or Firestore the app restart and leave no error to detect in the Logcat, Logcat will not be cleared it is just wont show error at the moment of restart, and my app will automatically set a new data to the Firestore or Firebase and some times restart when reading values,

            In the new update, I have come across errors like SQLiteConstraintException: UNIQUE constraint failed and E/android.vendin: Not starting debugger since process cannot load the jdwp agent. i dont know if it's related but those are showing.

            this is a serious problem guys, I have an iOS version same app written in Swift they both share the same functions to write and read to the database I mean same code different Languages connected to the same database there is no errors everything works fine on iOS with the firebase itself, and the same code was working before this update that's mean there's no problem with my code, please if anyone knows anything or came across this kind of situation let me know I need some help, I'm stuck for a week now I have been searching all over the internet Didn't found any answer, if anyone needs a further declaration or sharing some code please let me know

            emulator runing R version and the app was tested on a real Device SamsungNote S21

            Note: if I Run the app the first time and write to firebase the app will crash or as I mentioned restart.

            Note: but if I wrote to firebase and Re-run my app before the app write again or before the crash the app will works fone

            project Gradle



            Answered 2022-Mar-06 at 03:20

            I see there are no problems with your dependencies and I think what you have is that you write data to the firebase database after getting some data using ValueEventListener, so even if your activity has destroyed ValueEventListener will still listen in the previous Activity according to this answer https://stackoverflow.com/a/63636051/8793968 @ and this answer https://stackoverflow.com/a/63636048/8793968 @ so it will restart and show no errors

            Source https://stackoverflow.com/questions/71304040


            TURF booleanwithin is not working as expected
            Asked 2022-Mar-03 at 14:56

            im currently trying to validate that a polygon is completely within another polygon. But there is a use case for more complicated polygons where it should return false but turf understand it as a valid one.

            Here is the sandbox.


            And here are the polygons. https://gist.github.com/tomascenteno42/107c19531ebbcf8f8106c27282bf3891

            Thanks (:



            Answered 2022-Mar-03 at 13:09

            The problem is that, currently, booleanWithin only handles a very limited case of testing convex polygons. That's because it only checks if the vertices of the 1st polygon are within the 2nd polygon.

            This might not be get fixed before v7.

            For now you might consider to use de9im library.

            It's from turf's issue page.

            Source https://stackoverflow.com/questions/71337511


            React ref.current is still null in componentDidUpdate
            Asked 2022-Feb-25 at 14:07

            I'm trying to zoom-in on a set of coordinates using react-map-gl. To do so, the library encourages us to use React's Refs. When instantiating the component in render, I'm passing down a ref that should hold the underlying MapBox map object. I managed to make the behavior work. Only problem: it's highly inconsistent.

            I'm calling a method called setCamera in componentDidUpdate. But it only works on the initial load. If I reload the page, I've got an error from Gatsby. If I close the error it will work again. Up until the next reload.

            The error is that this.mapRef.current is null. I tried to put a conditional to verify that the value isn't null before trying to access it, however this cause the animation to just never work. No matter how many times I reload, it will never be performed. Whereas without the conditional it could at least work half the time before crashing. So this already is a mystery in itself and if someone has an idea for why such behavior can happen, I'm all ears.

            Still, I wasn't discouraged and tried to put the call to setCamera in a setTimeout and yes, it works! Even putting a very low timeout like 1 makes the code work 95% of the time. But I'm unsatisfied with it, because I understand that putting that kind of timers isn't what I'm supposed to do and to make things worse, it doesn't fix the issue consistently.

            My understanding of the problem is that MapRef is still not set in componentDidUpdate for some reason. It's being set sometimes later. I don't know if React supports threading or if some kind of async witchcraft is deceiving me behind the scenes, but what I'm wondering is when am I guaranteed for my ref to be properly set? Where or how should I write this code?

            Thank you in advance to anyone who can help me on that. 🙂

            Here's my sample code:



            Answered 2022-Feb-25 at 14:07

            I've found a solution!

            My issue was that setCamera was dependent on two conditions and these two conditions could happen in any order.

            1. Fetch is successful and we have data to display.
            2. The map is loaded and we have a ref to it.

            Instead of initializing mapRef, in the constructor or in render, I've made a function…

            Source https://stackoverflow.com/questions/71224100


            How can I use d3 force to space out overlapping points on a map
            Asked 2021-Dec-05 at 06:03

            I have a map that has some overlapping points. I'm using a quadtree and turf.js to determine, when I click on a point, how many other points are within a 30 mile radius.

            What I'd like to do (if there's more than one point in that radius) is use d3.forceSimulation to equally spread out the overlapping points.

            This is a pretty close example of what I want to do, but uses d3v3 and google maps: http://bl.ocks.org/cdmahoney/raw/9876525/?raw=true

            I have included d3.forceSimulation and when I click on a place with more than one point within the 30 mile radius, the points do take on the force-- but they move up to the left hand corner of the page.

            How can I get the points to push out in even distances from where I click on the map, like this:

            Help very much appreciated!!



            Answered 2021-Dec-05 at 06:03

            While I'd be tempted to not use a force layout for this, I'll work with the code you have here (though the question of the lines connecting the circles to their original location is not addressed here) and quickly address why the circles do not behave as you expect.

            A force layout will create the appropriate properties on a node if they don't exist. For position of a node, these properties are d.x and d.y. Your data does not have x or y properties, so when you create the force, the nodes are initialized with values around the origin, [0,0], which is why they migrate to the top left corner. This problem can be solved by creating x and y properties:

            Source https://stackoverflow.com/questions/70230656


            Nuxt: Module should export a function: @turf/helpers [ERROR]
            Asked 2021-Oct-23 at 12:51

            Does anyone know why am I getting Module should export a function: @turf/helpers when I add @turf/helpers to my buildModules in nuxt.config.js?




            Answered 2021-Oct-09 at 19:26

            Importing it as a regular NPM package and using it without colliding with the same variable name fixed the issue!

            Indeed, this was not a Nuxt module.

            Source https://stackoverflow.com/questions/69500931


            update to Angular 12 ng2-nouislider not working
            Asked 2021-Oct-01 at 11:15

            after update from angular 11.2.6 to angular 12.2.7 the binding to the nouislider component is not working anymore. Running ng serve prints this error:

            The property and event halves of the two-way binding 'ngModel' are not bound to the same target.

            Use the ng2-nouislider in a fresh installation it works fine.




            Answered 2021-Oct-01 at 11:15

            As you can see from the image below, that library's latest Angular version is 4.4.1 which is before way Angular Ivy. It is not expected to work seamlessly wih Angular 12.

            But you have an even better solution. You can copy-paste the code of the component in the GitHub project and put it in your own. It's a relatively simple component so it will not be very difficult to migrate it. You will also have the advantage of not worrying about the dependency anymore which makes it more maintanable.

            You can check the component's code here: https://github.com/tb/ng2-nouislider/tree/master/src

            Source https://stackoverflow.com/questions/69402206


            Using the concept of JPA, how to update table using data from another table?
            Asked 2021-Sep-21 at 08:57




            Answered 2021-Sep-21 at 08:57

            An update query like this doesn't return a result set. Remove the return type:

            Source https://stackoverflow.com/questions/69247420


            Openlayers - Turf.js Get distance between two Points using EPSG:3857
            Asked 2021-Sep-06 at 14:56

            I want to show the user the distance from the last drawn point to the cursor. In order to do so I need to add a change listener to the geometry of the feature.

            Every time the user moves the mouse this change will get triggered and I need to calculate the distance. So in order to do so I want to use Turf.js. But the problem is that output distance is way to big. I think it has to do with the coordinate system I use.

            In my project I the coordinates are in EPSG:3857 and I think the distance function expects ESPG:4326. I have tried to use ol proj in order to convert. But then I get an error stating: Uncaught TypeError: destinationProjection is null

            olProj.transform(geom.getCoordinates()[0].slice(-3)[0], 'EPSG:3857', 'ESPG:4326');



            Answered 2021-Sep-06 at 14:56

            It is null because 'ESPG:4326' should be 'EPSG:4326'. But you do not need turf to do that

            Source https://stackoverflow.com/questions/69074550

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install turf

            You can download it from GitHub, Maven.


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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