> - am i simply nuts? have the lat and lng fields been named "ra"
> and "sa" all along?

Probably not - they can be renamed at any time.

> - is my hunch correct that Google developers can make any changes they
> want to the JSON data structure, as long as the published accessors
> function as advertised?

Technically, the documentation says that the location property is a
LatLng object. LatLng does not have public properties called lat and
lng and Google can make changes to undocumented properties at any
time.

> - I saw no mention in the changelog about the renaming of the fields.
> can I count on these field names staying constant for a while?

No. Expect them to change regularly.

> This is all pretty academic: If I cannot rely on the JSON structure
> being constant, I always have the option of extracting only the fields
> I need on the client side using published JavaScript accessors and
> sending them to my server. But until I know what fields I really need,
> it would be nice to send over the entire JSON structure.
>
> Thoughts?

You should read this thread - you aren't the first to have difficulty
with this: 
https://groups.google.com/group/google-maps-js-api-v3/browse_thread/thread/58bee37631e3a366/1b370f35244d5581

Chad Killingsworth

>
> - ff

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