# Isobars? **URL:** https://forum.flowx.io/t/isobars/1074 **Category:** Help **Created:** [May 20, 2021, 9:25am UTC](https://forum.flowx.io/t/isobars/1074 "2021-05-20T09:25:14Z") **Posts on this page:** 6 **Page:** 1
### Author: ![sinjun](https://forum.flowx.io/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@sinjun](https://forum.flowx.io/u/sinjun) #### Post date: [May 20, 2021, 9:25am UTC](https://forum.flowx.io/t/isobars/1074/1 "2021-05-20T09:25:14Z")
Is there any way of overlaying isobars on fields such as wind speed, temperature or precipitation? I realise it is possible to get a standalone view of the mean sea level pressure field colour filled, without the option of isobar plots on these other fields the app is much less useful to me. ---
### Author: ![BrianLY-38](https://forum.flowx.io/user_avatar/forum.flowx.io/brianly-38/32/836_2.png) [@BrianLY-38](https://forum.flowx.io/u/BrianLY-38) #### Post date: [May 21, 2021, 3:04pm UTC](https://forum.flowx.io/t/isobars/1074/2 "2021-05-21T15:04:58Z")
@sinjun Hello and Welcome to the Forum and Thank You for Using Flowx ---
### Author: ![Ohan](https://forum.flowx.io/user_avatar/forum.flowx.io/ohan/32/249_2.png) [@Ohan](https://forum.flowx.io/u/Ohan) #### Post date: [May 21, 2021, 4:30pm UTC](https://forum.flowx.io/t/isobars/1074/3 "2021-05-21T16:30:39Z")
Hi @sinjun and welcome to the forum! This question have been asked before and then the developer @duane a answered this: > [@Suggestion.... Isobars!](https://forum.flowx.io/t/suggestion-isobars/562/3): > > Isobars are very hard to do with the swiping action. They are too costly to compute on the fly. I’ve been thinking of way to do this or pre-compute them - it’s not easy. There might be some tricks in OpenGL to do this but I haven’t tried them yet. However: > [@Suggestion.... Isobars!](https://forum.flowx.io/t/suggestion-isobars/562/3): > > you can turn on pressure with stepped color which indicates these isobars. > > Cheers, Duane. Hope this answer is any help. ---
### Author: ![Ohan](https://forum.flowx.io/user_avatar/forum.flowx.io/ohan/32/249_2.png) [@Ohan](https://forum.flowx.io/u/Ohan) #### Post date: [May 21, 2021, 4:44pm UTC](https://forum.flowx.io/t/isobars/1074/4 "2021-05-21T16:44:19Z")
@sinjun you can for example make it look like this: ![flowx](https://forum.flowx.io/uploads/default/original/1X/a2fc7e7214b12d93ca058aa83a0917fa486d2405.jpeg) Long press on the color-bar below the map to change the settings for color and the range. ---
### Author: ![Ohan](https://forum.flowx.io/user_avatar/forum.flowx.io/ohan/32/249_2.png) [@Ohan](https://forum.flowx.io/u/Ohan) #### Post date: [May 21, 2021, 4:53pm UTC](https://forum.flowx.io/t/isobars/1074/5 "2021-05-21T16:53:11Z")
Personally I prefer this settings (RdBu is the 11th from the bottom of the list). ![Screenshot_20210521-184653](https://forum.flowx.io/uploads/default/original/1X/888d0956ac9762e3326402f8f2254a1d80f2884d.jpeg) Zoomed in a bit it is looking like this: ![Screenshot_20210521-184715](https://forum.flowx.io/uploads/default/original/1X/7b94359b5680b739596d0b8d1def7b95754411b4.jpeg) As you can see, the limited number off shades of color actually turns into a feature: something that’s looking like isobars. ---
### Author: ![sinjun](https://forum.flowx.io/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@sinjun](https://forum.flowx.io/u/sinjun) #### Post date: [May 21, 2021, 7:36pm UTC](https://forum.flowx.io/t/isobars/1074/6 "2021-05-21T19:36:14Z")
Thanks for the suggestions everyone. A stepped colour fill with a range 976 to 1040 gives 4 mb intervals and something a little more useful. I didn’t realise everything was computed on the fly, so I see the problem. Would it be possible to make a colour scheme in which everthing was white (or transparent) but intermittently black the ranges 999.9 to 1000.1, 1003.9 to 1004.1, 1007.9 to 1008.1 etc. ? That way the fast colour fill routine could be made to produce isobars. Probably would look a bit rougher than a contouring scheme but may well be good enough.