Iterating over Typescript Map
You could use Map.prototype.forEach((value, key, map) => void, thisArg?) : void instead Use it like this: myMap.forEach((value: boolean, key: string) => { console.log(key, value); });
maps
What is the ideal data type to use when storing latitude / longitude in a MySQL database?
Basically it depends on the precision you need for your locations. Using DOUBLE you’ll have a 3.5nm precision. DECIMAL(8,6)/(9,6) goes down to 16cm. FLOAT is 1.7m… This very interesting table has a more complete list: http://mysql.rjweb.org/doc.php/latlng : Datatype Bytes Resolution Deg*100 (SMALLINT) 4 1570 m 1.0 mi Cities DECIMAL(4,2)/(5,2) 5 1570 m 1.0 mi Cities … Read more
Calculate distance between two latitude-longitude points? (Haversine formula)
This link might be helpful to you, as it details the use of the Haversine formula to calculate the distance. Excerpt: This script [in Javascript] calculates great-circle distances between the two points – that is, the shortest distance over the earth’s surface – using the ‘Haversine’ formula. function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) { var R = 6371; // … Read more