[sldev] Uniquely identifying parcels

[Adam Frisby]

RegionHandle is based on the position of the region, and is as close to 
a region ID we can get. Changes if the sim moves, but is otherwise unique.

ParcelID is mostly unique. If a parcel is subdivided, it will be split 
into two parcels with different IDs. So subdiving/joining will change 
the IDs, but otherwise it should stay the same.

A combination of the two can make an alright parcel identifier, only 
that you need to be aware that it can change.

Adam

Able Whitman wrote:

> The ParcelProperties message includes a LocalID for the parcel, but not 
> an LLUUID for it. For my purposes, this is unfortunate.
> 
> I'm hoping there is a way uniquely identify parcels in a given region. 
> Is the LocalID a reliable identifier for a given parcel in a region? Or 
> does it change, like when a region restarts?
> 
> Similarly, is a region's RegionHandle fixed, or is it also mutable? If 
> it's mutable, then is the region name fixed?
> 
> I'd like to be able to use a combination of a RegionHandle (or a 
> region's name) and a parcel LocalID to uniquely identify a parcel. If 
> that won't work, the alternatives are pretty hackish.
> 
> These are probably questions for a Linden, but since I don't know who 
> specifically to ask, I'm posting here. :)
> 
> Thanks!
> --Able
> 
> 
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