[Qgis-user] mac computer configuration [Qgis-user Digest, Vol 175, Issue 21]

[RMG]

Hello Charles,

Thanks for chiming in. No idea what MRF and pyramid-ing rasters are, but I
will look into all your suggestions and others'.

Best wishes,

Reiko Matsuda Goodwin
Comoé Monkey Project <https://www.facebook.com/ComoeMonkeyProject/>
Guenon Conservation Community
<http://facebook.com/GuenonConservationCommunity/>

On Thu, Sep 10, 2020 at 7:16 PM <qgis-user-request at lists.osgeo.org> wrote:

>
> Message: 2
> Date: Thu, 10 Sep 2020 21:23:12 +0200
> From: Charles Dixon-Paver <charles at kartoza.com>
> To: RMG <reikogoodwin at gmail.com>
> Cc: QGIS Users <qgis-user at lists.osgeo.org>
> Subject: Re: [Qgis-user] Qgis-user Digest, Vol 175, Issue 18
> Message-ID:
>         <CAK2KqicJm413tAMFsJDiE2jQ17WLysGJE41BcAFyd=_
> EE0+QDA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I just wanted to chime in here and say that if you are just viewing large
> raster datasets and not necessarily "processing" (performing raster
> analysis etc) then your bottleneck is probably not going to be CPU/ RAM but
> will rather be related to disk IO. If you are reading in large files from
> external drives or cloud storage etc under operational conditions it will
> almost certainly be causing performance issues.
>
> I agree that getting your vector datasets in order as Andreas suggested
> (spatial index etc) is going to be of great benefit to you, but I would
> like to state that perhaps investing in some decent storage (large format
> SSD or an external solid state drive with a high speed connection port like
> thunderbolt 3/ USB 4) and doing some raster preprocessing may have a marked
> improvement in your mapping experience, even on limited hardware.
>
> I would suggest collecting all your relevant imagery into a collection of
> compressed and optimised raster format (I suggest MRF, but I have not used
> them extensively in the QGIS ecosystem and maybe someone else has a better
> option) so that you can condense your already expansive imagery collection
> onto a high speed disk and retain the original data for posterity (if you
> convert Geotiff to MRF it will be a fraction of the size depending on your
> settings. Run some tests, but you shouldn't need anywhere near the same
> amount of high speed drive storage).
>
> It may work out a lot cheaper in the long run to spend a bit extra on some
> good storage, but without more detailed information on your requirements
> it's hard to say what is needed. If you only occasionally do heavy
> processing work, you can always try to schedule it for overnight/ weekend
> batches so that it's computer time intensive, or there's always the
> possibility (depending on your situation) to offload the computation
> requirements to a service platform (although the bandwidth implications for
> raster processing usually make this rather difficult).
>
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> End of Qgis-user Digest, Vol 175, Issue 21
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