NullPointerException NullPointerException - 1 year ago 89
Java Question

Ordering with SQLITE by nearest latitude & longitude coordinates

I must obtain a SQLite SQL Sentence for ordering by nearest latitude and longitude coordinates, given a initial location.

THis is a example sentence for my table in the sqlite database:

SELECT id, name, lat, lng FROM items

EXAMPLE RESULT: 1, Museu, 41375310.0, 2175970.0

I must achieve this with SQLite, and with that table. I can't use another techniques because this is for a existen SQlite database that i can't change.

Exists a way to achieve this with Android and SQlite? I checked a lot of stackoverflow posts and i didn't find the way to achieve that


Answer Source
SELECT * AS distance FROM items ORDER BY ABS(location_lat - lat) + ABS(location_lng - lng) ASC

This should roughly sort the items on distance in MySQL, and should work in SQLite.
If you need to sort them preciser, you could try using the Pythagorean theorem (a^2 + b^2 = c^2) to get the exact distance.

Recommended from our users: Dynamic Network Monitoring from WhatsUp Gold from IPSwitch. Free Download