Getting longitude/latitude from a link in JavaScript

Question

I am fairly new to programming. I need to extract coordinates from a link I get when recieving my data. The object I'm interested in looks like this:

 event: {
"type": "message",
"attachments": [{
    "facebookUrl": "https://www.bing.com/maps/default.aspx?v=2&pc=FACEBK&mid=8100&where1=52.217125%2C+5.959805&FORM=FBKPL1&mkt=en-US"
  }],
}

So, I'm interested in event.attachments[0].facebookUrl (is this the right notation to access it?). What is the right approach to get the coordinates lat: 52.217125 and lon: +5.959805 from this? Problem is that lon can either start with + or -. I have no idea how to do this using for example regex matching.

your notation event.attachments[0].facebookUrl is correct

duncan
– duncan

2016-05-22 17:25:11 +00:00
Commented May 22, 2016 at 17:25 — duncan
– duncan, Commented May 22, 2016 at 17:25

Russbear · Accepted Answer · 2016-05-22 17:23:25Z

1

You're looking for a url parsing library. From there you can get the querystring (everything past the ?), and feed that into a query string library which will give you the arguments.

I am not linking to them because finding good libraries is an important skill, and these are ubiquitous libraries.

answered May 22, 2016 at 17:23

Russbear

1,2611 gold badge11 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

bdbdbd Over a year ago

I tried using a regex instead of using a library, but it doesn't work. /([+-]?\d*\.?\d*)%2c([+-]?\d*\.?\d*)\&/

Russbear Over a year ago

Don't use a regex. The number of assumptions you are making about the structure of the URL is crazy. Are lat long always going to be in that order? What if something else like zoom level or elevation has a similar enough structure to get picked up? Don't waste your time making kludge code when the general problem has already been solved. If it was node it would be url.parse(facebookURL, true).query.where1.split(', ') to get an array of [lat, long]. nodejs.org/docs/latest/api/url.html

bdbdbd · Accepted Answer · 2016-05-22 21:08:56Z

0

The following regex matching works for me: /([+-]?\d*\.?\d*)%2c([+-]?\d*\.?\d*)/i.

It gives me an array with 3 elements: [52.217125%2C+5.959805, 52.217125, +5.959805] So I just use arr[1] and arr[2].

answered May 22, 2016 at 21:08

bdbdbd

5737 silver badges18 bronze badges

Collectives™ on Stack Overflow

Getting longitude/latitude from a link in JavaScript

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related