How to calculate the distance between a given place and others around it

[Benito_Abraham]

// updates the Deal table

let tDeals = base.getTable(‘Deals’);

let qDeals = await tDeals.selectRecordsAsync();

for (let rDeals of qDeals.records){

let d= getDistanceFromLatLonInKm(rDeals.getCellValue(‘Latitide’),rDeals.getCellValue(‘Longitude’),rDeals.getCellValue(‘BLa’),rDeals.getCellValue(‘BLong’));

await tDeals.updateRecordAsync(rDeals.id, {‘Distance’ : d})

}

// distance between 2 given points (in miles)

function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {

var R = 3958.75586579; // Radius of the earth in miles

var dLat = deg2rad(lat2-lat1); // deg2rad below

var dLon = deg2rad(lon2-lon1);

var a =

Math.sin(dLat/2) * Math.sin(dLat/2) +

Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 

Math.sin(dLon/2) * Math.sin(dLon/2)

; 

var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

var d = R * c; // Distance in miles

return d;

}

function deg2rad(deg) {

return deg * (Math.PI/180)

}

[Tobias_Bindemo]

Hi!

Thanks for the script. I didn’t get it to work however.
Are you interesting in helping me solve it? Of course I can pay for it.

[Benito_Abraham]

Hi Tobias,

Yes, I’d like to lend you a hand…

[Bill_French]

Tobias_Bindemo:

I didn’t get it to work however.

The code @Benito_Abraham shared is functional; it definitely works. I use a variant of that approach; feel free to test this one.

My hunch is you are running into changes that are necessary to use this code in the context of your own data/table.

output.markdown('# Distance From Point A to Point B');

let pointA = [37.09652780, -113.5684164]; // St George
let pointB = [36.1251954,-115.3154252];   // Las Vegas

output.markdown("Point A: " + pointA.toString());
output.markdown("Point B: " + pointB.toString());

let distanceInMiles = distance(pointA[0], pointA[1], pointB[0], pointB[1]);

output.markdown("Distance in Miles: " + distanceInMiles);

    //:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
    //:::                                                                         :::
    //:::  This routine calculates the distance between two points (given the     :::
    //:::  latitude/longitude of those points). It is being used to calculate     :::
    //:::  the distance between two locations using GeoDataSource (TM) prodducts  :::
    //:::                                                                         :::
    //:::  Definitions:                                                           :::
    //:::    South latitudes are negative, east longitudes are positive           :::
    //:::                                                                         :::
    //:::  Passed to function:                                                    :::
    //:::    lat1, lon1 = Latitude and Longitude of point 1 (in decimal degrees)  :::
    //:::    lat2, lon2 = Latitude and Longitude of point 2 (in decimal degrees)  :::
    //:::    unit = the unit you desire for results                               :::
    //:::           where: 'M' is statute miles (default)                         :::
    //:::                  'K' is kilometers                                      :::
    //:::                  'N' is nautical miles                                  :::
    //:::                                                                         :::
    //:::  Worldwide cities and other features databases with latitude longitude  :::
    //:::  are available at https://www.geodatasource.com                         :::
    //:::                                                                         :::
    //:::  For enquiries, please contact sales@geodatasource.com                  :::
    //:::                                                                         :::
    //:::  Official Web site: https://www.geodatasource.com                       :::
    //:::                                                                         :::
    //:::               GeoDataSource.com (C) All Rights Reserved 2018            :::
    //:::                                                                         :::
    //:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
    function distance(lat1, lon1, lat2, lon2, unit) {
    	if ((lat1 == lat2) && (lon1 == lon2)) {
    		return 0;
    	}
    	else {
    		var radlat1 = Math.PI * lat1/180;
    		var radlat2 = Math.PI * lat2/180;
    		var theta = lon1-lon2;
    		var radtheta = Math.PI * theta/180;
    		var dist = Math.sin(radlat1) * Math.sin(radlat2) + Math.cos(radlat1) * Math.cos(radlat2) * Math.cos(radtheta);
    		if (dist > 1) {
    			dist = 1;
    		}
    		dist = Math.acos(dist);
    		dist = dist * 180/Math.PI;
    		dist = dist * 60 * 1.1515;
    		if (unit=="K") { dist = dist * 1.609344 }
    		if (unit=="N") { dist = dist * 0.8684 }
    		return dist;
    	}
    }