[postgis-users] Re: if i use postgis, is it true that i'll then have to worry about supporting only 1 database??

[Bart van den Eijnden (OSGIS)]

Right, that's Direct Connect, but in my opinion that is still SDE in 
between ..... though not in the form of an application server.

Best regards,
Bart

Paul Ramsey schreef:
> Indeed, it looks like there was a form of low-level time support that 
> must have been built in the academic research days... it only survived 
> into the 6.X series:
>
> http://www.postgresql.org/docs/6.3/static/c0503.htm
>
> As the page notes, you can do historical information storage with 
> triggers pretty easily.  This is distinct, however, from "versioning" 
> as understood by ESRI, which is a form of branch-and-merge operation.
>
> P.
>
> On 8-Feb-08, at 8:55 AM, Chris Hermansen wrote:
>
>> Postgres (not PostgreSQL) had a kind of versioning built-in; it was
>> called "time travel".
>>
>> I believe that time travel was supported at one time in PostgreSQL, too,
>> and there is some contributed stuff laying about in the PostgreSQL
>> install that would indicate it's still do-able.
>>
>> dnrg wrote:
>>>> In order to do this, you may need some interchange
>>>> software developed - for instance, if you have to do
>>>>
>>>
>>>
>>>> any "traditional cartography", how will you proceed?
>>>> By converting your data to shapefile and then using
>>>> ArcView?  How will you maintain / update your
>>>> data?  Using QGIS, or will you have to buy say some
>>>> kind of plugin software component for Arc*** so that
>>>> you can edit the PostGIS spatial data?
>>>>
>>>
>>> ESRI tells me that, at the ArcGIS Desktop release 9.3,
>>> you'll be able to edit PostGIS data as core
>>> functionality. No SDE required. This will open doors
>>> and minds I hope. Paul, any comments on that?
>>>
>>> At ArcGIS Desktop 9.2, evidently, you can already edit
>>> PostGIS data using the Interoperability extension.
>>>
>>> Paul, will PostGIS ever have versioning functionality
>>> for editing workflows similar to ArcSDE? Guess that
>>> would pervert the data, and then PostGIS would "own"
>>> the data in a way like ArcSDE does presently. Still,
>>> many shops find versioning valuable for workflows.
>>>
>>> Not sure how I feel about versioning. Just curious how
>>> PostGIS developers feel about it--if it's in the
>>> development roadmap / pipeline or not. And if not, why
>>> not.
>>>
>>> Dana
>>>
>>>
>>>
>>>       
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>>
>>
>> -- 
>> Regards,
>>
>> Chris Hermansen · mailto:clh at timberline.ca
>> tel:+1.604.714.2878 · fax:+1.604.733.0631
>> Timberline Natural Resource Group · http://www.timberline.ca
>> 401 · 958 West 8th Avenue · Vancouver BC · Canada · V5Z 1E5
>>
>> C'est ma façon de parler.
>>
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-- 
Bart van den Eijnden
OSGIS, Open Source GIS
bartvde at osgis.nl
http://www.osgis.nl