On 08/30/2010 04:14 PM, kyleduncan wrote:
Hi,
thanks for the tips! to answer your questions:
1. our model doesnt specify a coordinate system, it just saves the lat
and lng that are returned from google maps.
2. i thought transforming had to be done to make a lat/lng point
"spatial" before distance was calculated. have i got that wrong?
3. i'm not actually sure we even have a "geodatabase". all we have are
pointfields in the model for users, which save the lat/lng points from
google.
Those PointFields are what make it a geo database (well, that's how I
use the terminology anyway).
So your_object.your_point_field.distance(another.your_point_field) ought
to give you a distance alright.
I don't know from the top of my head which unit that distance is in.
I've only had to pick the closest one till now :-)
i'm not really capable enough to know how to proceed on my own from
your points, but for now i'll try removing the transform() (and also
placing it after) and i'll also specify the transform SRID of 900973
(is that the SRID for google or are you talking about something else
with that number?)
Oopsie, that's 900913 instead of 900973 (google written in characters
that look a bit similar).
Reinout
--
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