How to calculate lat/long distance

[Anonymous]

I have an example table below with lat/longs, what I'm trying to figure out is there a way to input unique lat/longs and have that calculate the distance to the lat/long in the table below. Thanks again for the help.

Reception	Latitude	Longitude
CARLSBADR	32.46959	-104.137
CARR	40.88491	-104.867
CASPER	42.85017	-106.351
CBEAUMONT	30.04742	-94.0736
CDICKINSN	29.46067	-95.0451
CHANNELVW	29.76388	-95.1027
CHARENTON	29.87393	-91.5207
CHEROKEE	36.7986	-98.3595
CHILDRESS	34.38211	-100.263
CHINAGR	32.52974	-100.821

[MightyBiiish]

Be careful! The accepted answer does not include the step of converting Degrees to Radians. You will get a very different answer if you do not convert to radians.

The final formula should be:

=ACOS((SIN(RADIANS(Lat1)) * SIN(RADIANS(Lat2))) + (COS(RADIANS(Lat1)) * COS(RADIANS(Lat2))) * (COS(RADIANS(Lon2) - RADIANS(Lon1)))) * 6371

This calculates distance (in kilometers) between two points on the surface of the Earth as a sphere.

Also note:

• There will be some inaccuracy because we're using an average for the Earth's radius
• There may also be some inaccuracy from rounding (I get slightly different results when using a calculator)

[Wiktorek]

Use Google Earth.

[grantbrimhall]

Not terribly helpful... . One set of points? Sure. But if you have 50 and you want the top 5 shortest? User won't wait while you run that api 50 times to determine the shortest.

[Anonymous · Accepted solution]

@Anonymous 

You need Latitude and Longitude to calculate the distance between two locations with following formula:

=acos(sin(lat1)*sin(lat2)+cos(lat1)*cos(lat2)*cos(lon2-lon1))*6371 (6371 is Earth radius in km.)

For your requirement there are also Power Query or DAX method.

Paul Zheng _ Community Support Team
If this post helps, please Accept it as the solution to help the other members find it more quickly.

[HE_Yanfeng]

Thank you very much for your information.

However, I wonder the distance is a straight line distance between two points or a curved distance on the Earth?

I would like to appreciate very much if you can anwser this question.

[blopez11]

I have used the following as reference in the past

https://dataveld.com/2019/03/20/display-points-within-a-distance-radius-on-a-power-bi-map/

[Anonymous]

That's actually pretty slick as well but won't work for what I'm trying to accomplish. I need to input certain lat/longs in then calculate the distance to the closest reception point. 

[mahoneypat]

You can either hardcode in the Haversine formula (or other formula) to calculate distance from lat/long inputs, or you could use a web api to send the lat/log for start and finish to get the distance.

Regards,

Pat

[uiroewpqruewqoi]

Are you saying send the points to a service that calculates the distance using street maps? Otherwise, using a web service to run a simple Haversine, et. al., makes little sense.