hello, its me again. how does one calculate distance travelled over time on a map in thunkable x? I intend on generating a notification if a certain distance is covered within x amount of time

here’s my latest version you could test with - it’s not ready to publish yet because i can verify the calculation of 2 sets of points using my version and haversine (in excel) but it fails when i try to work on your set of points! (38.109192,-122.578262) and (40.7128,74.006) did you mean LON2 to b…

HAVERSINE ALTERNATIVE USING SPHERICAL LAW OF COSINES it has come to my attention that i had mistakenly posted a thunkable solution for calculating distance between 2 points on the globe as the haversine formula (i even mispelled it as havesine!). i went back to my sources and discovered that what i…

Aha! Yes, it should be -74.006. Thank you for catching that. I was trying to find a spot in New York and my Google search returned 74.006 W but I didn’t realize that needed to be negative. That explains a lot. Sorry, very new to this!

I tried your second Thunkable project with the locations I’m using for testing: one (relatively) near San Francisco and one in New York City. The distance returned was ~2565 which is what I expected. Awesome! It turns out that an excel formula I had set up in a Google sheet (looks to be the same as…

Why can’t I make that work? I did a project here: https://x.thunkable.com/copy/ab7f391eae78b2a60232b46aa4ce76de that does what’s in the guide, but still it doesn’t work? [Skærmbillede 2020-10-04 19.15.10] Working in km by the way… I get 7365 km, where you get 347…

Are you looking for something like this? Much easier when done server side. Particularly when you start dealing with bigger data sets [image] How to get the closest distance to my point Questions about Thunkable I’m working on the tutorial for this!!! [UPDATE] you’re lo…

Thank you Jared, but I’m trying to do the calculations in-app - that should be possible, shouldn’t it? Not counting on more than 10 points in a list.

Definitely should be possible! You got this!

@engberg Here’s the fix: When you are setting the value of app d, you need to take the acos of w+v. But you are taking the acos of w and then adding v to the result. So instead of acos(w)+v, it needs to be acos(w+v). If you fix that, then you get 347.

I could not see the forest for trees - thank you @tatiang for giving it a second look…

Calculate distance travelled

Questions about Thunkable X

jared October 4, 2020, 5:51pm 18

Are you looking for something like this? Much easier when done server side. Particularly when you start dealing with bigger data sets

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Calculate distance travelled

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