Instalar pacote
* composer require grimzy/laravel-mysql-spatial:^3.0

https://packagist.org/packages/grimzy/laravel-mysql-spatial#3.0.0 (ótimo)
https://pt.stackoverflow.com/questions/373248/obter-raio-de-aproxima%C3%A7%C3%A3o-a-partir-de-uma-coordenada-geogr%C3%A1fica
https://php.docow.com/haversine-calculo-de-distancia-entre-dois-pontos-em-laravel.html

https://pt.stackoverflow.com/questions/55669/identificar-se-conjunto-de-coordenadas-est%C3%A1-dentro-de-um-raio-em-android
http://academicosdoexcel.com.br/2017/10/01/distancia-entre-locais-latitude-e-longitude/

https://www.geodatasource.com/developers/php
https://living-sun.com/pt/php/626779-calculate-the-radius-around-a-lat-lon-gps-point-in-php-php-mysql-gps-coordinates-haversine.html (acredito se esse)

//https://pt.stackoverflow.com/questions/55669/identificar-se-conjunto-de-coordenadas-est%C3%A1-dentro-de-um-raio-em-android
// https://developer.mozilla.org/pt-BR/docs/Web/API/Geolocation_API
// https://www.youtube.com/watch?v=WrzA8oqcxjA

Trabalhando com geocode
https://www.youtube.com/watch?v=y-OrP8AOxTc
https://www.youtube.com/watch?v=Zxf1mnP5zcw

 //https://www.calcmaps.com/pt/map-coordinates/
        //GPS Coordinates for Google Maps
        //https://chrome.google.com/webstore/detail/gps-coordinates-for-googl/agbofjnneeekffbjdcjhmmhmbldfogpc
        //R. Liberalina Antônio Amaral, Maj. Isidoro - AL, 57580-000
        //https://maps.googleapis.com/maps/api/geocode/json?address=SEU_CEP&key=SUA_API_KEY
        //AIzaSyDnLsM2QP-P3Jr-ZN5VOH5c7_VYrv_7Ii4 (minha key)
        //https://www.devmedia.com.br/como-utilizar-a-google-geocoding-api-para-obter-enderecos/36751