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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. </div>
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Doug</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Markus Neteler <neteler@osgeo.org><br>
<b>Sent:</b> Wednesday, December 23, 2020 4:51 PM<br>
<b>To:</b> Newcomb, Doug <doug_newcomb@fws.gov><br>
<b>Cc:</b> grass-dev@lists.osgeo.org <grass-dev@lists.osgeo.org><br>
<b>Subject:</b> [EXTERNAL] Re: [GRASS-dev] r.external cache or add overviews?</font>
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This email has been received from outside of DOI - Use caution before clicking on links, opening attachments, or responding.<br>
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On Wed, Dec 16, 2020 at 2:26 PM Newcomb, Doug via grass-dev<br>
<grass-dev@lists.osgeo.org> wrote:<br>
><br>
> Hi Folks,<br>
> Does r.external generate overviews during the linking process?<br>
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I don't think so.<br>
There is no sign of it in<br>
<a href="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">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</a><br>
or<br>
<a href="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">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</a><br>
<br>
Markus<br>
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