On 12/31/2013 01:09 PM, John R Pierce wrote:
On 12/31/2013 12:45 PM, peterlen wrote:
PostgreSQL has a geometric data type of "point". The format is listed
as (x,
y) but I am not sure if the X is to represent latitude or longitude.
I have
seen different systems that us X for either. Typically, coordinates
should
be read as lat/long but I have seen the opposite as well. An example
in the
help docs listed a point coordinate as x= longitude and y=latitude. Can
someone clarify what the postgres standard is? What this will come
down to
is how built-in geospatial functions will interpret the point value.
point is just x,y, it doesn't understand the spherical lat/long math
(unless you install PostGIS and use its Geometry types which are fully
aware of spherical coords), that said, Latitude is generally used as X
(left/right, aka east/west), while Longitude is Y (up/down aka north/south)
I thought it was the other way around?
--
Adrian Klaver
adrian.kla...@gmail.com
--
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general
