https://github.com/gabrieldarezzo/who-next
Pegue sua localização, e encontre as pessoas próximas (Formula de Haversine)
https://github.com/gabrieldarezzo/who-next
google-maps-api googlemaps haversine sample sql
Last synced: 8 months ago
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Pegue sua localização, e encontre as pessoas próximas (Formula de Haversine)
- Host: GitHub
- URL: https://github.com/gabrieldarezzo/who-next
- Owner: gabrieldarezzo
- Created: 2019-08-18T23:06:38.000Z (almost 7 years ago)
- Default Branch: master
- Last Pushed: 2022-12-30T18:26:39.000Z (over 3 years ago)
- Last Synced: 2024-12-27T05:41:58.450Z (over 1 year ago)
- Topics: google-maps-api, googlemaps, haversine, sample, sql
- Language: JavaScript
- Homepage:
- Size: 214 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# who-next
API em JS para informar quem está proximo de você em REAL-TIME
API in JS get nearbly users
```js
0 ~ 1 KM == VERDE
2 ~ 3 KM == AMARELO
>3 KM == VERMELHO
```
```js
let users = [
{
id: 1,
name: 'João',
// Google Maps
lat : -23.9789580,
lng : -46.3121512,
},
{
id: 2,
name: 'Vitor',
lat : -23.9772151,
lng : -46.3082780,
},
{
id: 3,
name: 'Murillo',
lat : -23.9581367,
lng : -46.3925527,
},
{
id: 4,
name: 'DEXTERpy',
lat : -23.9614568,
lng : -46.3247244,
},
{
id: 5,
name: 'Celso',
lat : -23.9739162,
lng : -46.3122721,
},
{
id: 6,
name: 'Darezzo',
lat :-23.9366827,
lng :-46.3882702,
},
];
```
Fórmula matemática de [Haversine](https://pt.wikipedia.org/wiki/F%C3%B3rmula_de_Haversine) (esfera da terra)
```sql
create database imasters;
use imasters;
CREATE TABLE pessoa (
id int(8) auto_increment primary key
,nome varchar(50)
,lat float(9,6) NOT NULL
,lng float(9,6) NOT NULL
);
INSERT INTO pessoa (nome, lat, lng) VALUE
('Vit', -23.9789580, -46.3121512)
,('Rafa', -23.9772151, -46.3082780)
,('João', -23.9581367, -46.3925527)
,('Rodrigo', -23.9366827, -46.3882702)
,('Celso', -23.9739162, -46.3122721)
,('allex', -23.9614568, -46.3247244);
/*
-- Rafa
-23.9772151
-46.3082780
*/
SELECT
(((acos(sin((-23.9772151*pi()/180)) * sin((`lat`*pi()/180))+cos((-23.9772151*pi()/180)) * cos((`lat`*pi()/180)) * cos(((-46.3082780- `lng`)*pi()/180))))*180/pi())*60*1.1515*1.609344) as distance
,nome
FROM pessoa
WHERE distance <= 10 -- KM
order by distance
;
/*
-- Result:
+------------------------+---------+
| distance | nome |
+------------------------+---------+
| 0.00013425232662457948 | Rafa |
| 0.43878413150349677 | Vit |
| 0.5470051287699728 | Celso |
| 2.4210902068465825 | allex |
| 8.821210177019271 | João |
| 9.29394275935523 | Rodrigo |
+------------------------+---------+
6 rows in set (0.00 sec)
*/
````