On Mon, Mar 22, 2021 at 9:27 AM PG Doc comments form
<noreply@postgresql.org> wrote:
>
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/10/earthdistance.html
> Description:
>
> Hi,
> I have installed
> CREATE EXTENSION CUBE;
> CREATE EXTENSION earthdistance;
>
> Post which I ran the following query:
> SELECT (POINT (19.974, 72.756)<@> POINT (19.195, 72.959)) AS DISTANCE;
>
> The answer came back as 21.17534 miles whereas the actual distance (as crow
> flies) is 55.42 miles which I have checked from 2-3 websites. (Google maps
> gives a greater distance which is travel by road & this value has been
> ignored).
>
> I know both the places and the distance between both of them cannot be 22
> miles. It has to be in excess of 50 miles atleast. What am I missing?
By your queasy it looks like you are comparing two points in the Norwegian Sea.
I think you may have swapped your latitude and longitude, and are
actually looking for:
postgres=# SELECT (POINT (72.756, 19.974)<@> POINT (72.959, 19.195))
AS DISTANCE;
distance
--------------------
55.421996899143366
--
Magnus Hagander
Me: https://www.hagander.net/
Work: https://www.redpill-linpro.com/
