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implementation of geo fencing in check-in and check-out page .

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Posted on by Akashdeep

i want to know how we can create when we click on check-in button and it is in the radius of geo fencing only than checked in otherwise not ,how can I do this ?

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WarrenBelz 153,079 Most Valuable Professional on at

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Hi @Akashdeep ,

Assuming you set (say) four points of latitude and longitude, you can get the distance from each one with, this will get you the distance in kilometres (just divide by 1,000) - so you can test that they are within whatever distance you want from each point

With( { wLat1: YourBoundary1Latitude, wLat2: Location.Latitude, wLong1: YourBoundary1Longitude wLong2: Location.Longitude, wCalc: 0.0174532925199432 }, 12742 * Asin(Sqrt(0.5 - Cos((wLat1 - wLat2) * wCalc)/2 + Cos(wLat1 * wCalc) * Cos(wLat2 * wCalc) * (1 - Cos((wLong1 - wLong2) * wCalc)) / 2)) )

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Akashdeep 57 on at

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I am a beginner can u explain it briefly how we can do this step by step ?

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WarrenBelz 153,079 Most Valuable Professional on at

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@Akashdeep ,

You need to decide how many "points" you want to use and wLat1/wLong1 would become wLat2/wLong2 etc etc. You would set a Variable on each

UpdateContext( { varDist1: With( { wLat1: YourBoundary1Latitude, wLat2: Location.Latitude, wLong1: YourBoundary1Longitude wLong2: Location.Longitude, wCalc: 17.4532925199432 }, 12742 * Asin(Sqrt(0.5 - Cos((wLat1 - wLat2) * wCalc)/2 + Cos(wLat1 * wCalc) * Cos(wLat2 * wCalc) * (1 - Cos((wLong1 - wLong2) * wCalc)) / 2)) ) } )

so you would have (say) four variables varDist1-4, then test if any of them are bigger than the limit you set, which should be the greatest distance between any two of them.

UpdateContext( { varGeoOK: varDist1 < YourDistance && varDist2 < YourDistance && varDist3 < YourDistance && varDist4 < YourDistance } )

This will return true if OK and false if not. NOTE: I have converted it to metres in the above.

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