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distance from us location to canada border

Asked by Rómulo Alves on 17 Sep 2019
Latest activity Answered by Ted Shultz
on 17 Sep 2019
Is there any matlab functionality or tool that allows me to find the minimal distance of a location to the border with canada , having as inputs the zipcode and lat/long of the location?

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Answer by Ted Shultz
on 17 Sep 2019

I don’t know of a direct function to measure distance from a country, but I did need to do something very similar. This is how I did it:
1) I found a map file that gave the lat/lon of the county of interest. You can find help for Canada here:
2) I interpolated the segments that that no segment was too far apart from each other (“too far apart” is driven by your accuracy requirements). More points = more accurate at short distances
3) I calculated the distance from my input point to all these points using the distance function. The shortest value is your answer.
A more elegant solution may be to compare your input point against all the line segments rather than just the points defining your country outline.

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