# Worldmap Great Circle Lines Issue

**URL:** <https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820>\
**Category:** General\
**Created:** [22 February 2022 14:36 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820 "2022-02-22T14:36:28Z")\
**Posts on this page:** 15\
**Page:** 1

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**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [22 February 2022 14:36 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/1 "2022-02-22T14:36:29Z")

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I'm having a small issue with great circle lines.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/a/2af8549d3f77dd5a118a6582844862528bf14f0e.png)

I don't think it's to look like that. 🙂

Here is the payload.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/8/f81132e7d356c26cfe9cffb3dd06e57ee2f19cc1.png)

Thanks  
Kyle

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [22 February 2022 14:45 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/2 "2022-02-22T14:45:03Z")

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can you paste that payload as a cut/paste rather than an image ? Thanks

- but yes leaflet was never good at handling antimeridian artefacts.

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**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [22 February 2022 18:10 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/3 "2022-02-22T18:10:02Z")

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`{"name":"JR4OZR","lat":"35.064339","lon":"134.145351","ttl":"1200","op":"WV4P","band":"15M","mode":"RTTY","isrunqso":"0","exchange":"JR4 2","section":"","ID":"8b033664350247ad98bb8436755a188c","distance":6614,"iconColor":"#FFFF00","layer":"15M","label":"15M","ismultiplier":1,"greatcircle":[[37.95805,-91.22578],[35.064339,134.145351]]}`

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [23 February 2022 15:44 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/4 "2022-02-23T15:44:20Z")

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solution pushed as v2.27.2

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**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [23 February 2022 17:24 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/5 "2022-02-23T17:24:13Z")

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Awesome! Thanks so much.

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**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [24 February 2022 18:22 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/6 "2022-02-24T18:22:25Z")

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FYI..the great circle lines are working. A questions.

Before the change, the lines were smooth and less boxy. Is there a way to smooth the circle lines out?

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/d/2d0c9e0655c2ae46da4e29b8b441b6baf270f100.jpeg)

Thanks  
Kyle

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<div class="post-metadata">

**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [24 February 2022 20:39 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/7 "2022-02-24T20:39:09Z")

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Try adding to your msg.payload - `"options": {vertices: 25}

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [24 February 2022 21:49 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/8 "2022-02-24T21:49:44Z")

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actually - I just updated the default to be smoother... v 2.27.3

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**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [25 February 2022 22:37 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/9 "2022-02-25T22:37:11Z")

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Thank you. I'm not seeing the update yet in my pallet manager.

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [26 February 2022 09:55 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/10 "2022-02-26T09:55:30Z")

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should be there now

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<div class="post-metadata">

**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [7 March 2022 18:15 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/11 "2022-03-07T18:15:53Z")

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I think the map is broken again for some reason. It was working great.

Some points seem to be fine, others are not.

Is there a way to not force it to go across the date line?

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/1/0/10a92b7feb341ac12656cf91285986ad69947f54.png)

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<div class="post-metadata">

**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [7 March 2022 18:46 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/12 "2022-03-07T18:46:18Z")

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not sure - I think there must an issue with the underlying library...  
looking at it it IS trying to do roughly the right thing given the amount of zoom you have - How does it look if you zoom in so you more or less fit the whole world across the screen ?  
Sadly leaflet really doesn't handle anti-meridian crossing well (or at all) so whatever happens it will be a bit hacky.

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<div class="post-metadata">

**Author:** ![aa0z](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Post date:** [19 March 2022 21:47 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/13 "2022-03-19T21:47:50Z")

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Sorry for the late reply on this. Just a quick update.

It doesn't matter what zoom level I have. I think the issue is hit or miss. Seems to happen more when drawing great circle lines from the US to Australia.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/5/e/5e644f60fd54d56d4fa0cba052475579dd5a7e1c.png)

Kyle

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<div class="post-metadata">

**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [15 May 2022 18:04 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/14 "2022-05-15T18:04:10Z")

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Here's a link to a flow we discussed last January.

> [@World Map Great Circle Lines](https://discourse.nodered.org/t/world-map-great-circle-lines/55842/14):
>
> For a minute there I thought you were going to go all "Chuckle Brothers" - to me - to you - to me - to you....

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [14 July 2022 18:04 UTC](https://discourse.nodered.org/t/worldmap-great-circle-lines-issue/58820/15 "2022-07-14T18:04:27Z")

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