> 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
--
Reinout van Rees - reinout@vanrees.org - http://reinout.vanrees.org
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