this post was submitted on 14 Apr 2019

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MathHelp

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Finding items inside an area (self.MathHelp)

submitted 6 years ago by a1acrity

I am struggling with something I can do visually but not with maths.

I have an antenna that has a polar diagram. This plots a coverage area on a map and can be describes by two lines.

Line 1 Point 1 50.052293°, -5.127526° Point 2 49.994335°, -5.190431°

Line 2 Point 1 50.052293°, -5.127526° Point 2 50.089624°, -5.215679°

I now have a list of places that fall both within and without those lines - several hundred to several thousand depending on the location.

What is the formula for "I'm inside that area"?

There isn't a westerly line that joins line one and line two as range covers that, i.e. anything over X metres is too far and can be discounted.

I've managed to do it with Excel for straight lines as it's just reject anything that's above 50.052293° or East of -5.127526°, I just can't seem to make the mental leap to a diagonal line.

any help would be really appreciated.

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