[GRASS-dev] [EXTERNAL] Re: r.external cache or add overviews?

[Newcomb, Doug]

I ask because I have created a 55 billion pixel vrt of elevation data. I linked it to a GRASS mapset . It did take an hour to link , but the zooming and panning is reasonably responsive afterwards.

Doug
________________________________
From: Markus Neteler <neteler at osgeo.org>
Sent: Wednesday, December 23, 2020 4:51 PM
To: Newcomb, Doug <doug_newcomb at fws.gov>
Cc: grass-dev at lists.osgeo.org <grass-dev at lists.osgeo.org>
Subject: [EXTERNAL] Re: [GRASS-dev] r.external cache or add overviews?



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On Wed, Dec 16, 2020 at 2:26 PM Newcomb, Doug via grass-dev
<grass-dev at lists.osgeo.org> wrote:
>
> Hi Folks,
> Does r.external generate overviews during the linking process?

I don't think so.
There is no sign of it in
https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FOSGeo%2Fgrass%2Fblob%2Fmaster%2Flib%2Fraster%2Fgdal.c&data=04%7C01%7Cdoug_newcomb%40fws.gov%7C4f0883ee7d50465461ea08d8a78cf995%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C637443571215425088%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Qqzy%2BTGm%2FTciBVpdomqzSW6vcggZMD9vfmvQSV4FDiE%3D&reserved=0
or
https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FOSGeo%2Fgrass%2Fblob%2Fmaster%2Fraster%2Fr.external%2Flink.c&data=04%7C01%7Cdoug_newcomb%40fws.gov%7C4f0883ee7d50465461ea08d8a78cf995%7C0693b5ba4b184d7b9341f32f400a5494%7C0%7C0%7C637443571215425088%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=vQs7F7GNkdpppxsX5iakyWEA64%2FivjqvZx1pbabnFkY%3D&reserved=0

Markus
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