Hello,


I'm building a pretty large map of satellite images through SAS Planet. What I've done so far.

1 Downloaded all pertinent zoom levels in SAS P (16-20)
2 Export KML file with a polygon selection slightly larger than all of the downloaded tiles in SAS Planet
2 Process Keyhole Mode the KML file in IMC
3 Attempting to build AT5 files from SAS cached data, min res 1 max res 8192 IMC takes a long time "Discovering Source Files Recusively in "correct path"" then it will start "Processing Map 20 0 -1 of 0-1. After doing this for an hour or so with no change in progress window I'll get a low memory error.

I've had success with a smaller map, but I'm not sure if I'm missing something or if there is a limit to file size.

I'm using a Dell Inspiron with 2.5 processor and 8 gigs of ram.

Thanks,
Brandon

Lower that 8192 or use lower resolution imagery.

In your case, it's using 4m, 2m, 1m, and half meter imagery to try to build an image at 8192m resolution.

This means that each pixel on the 8192m resolution is corresponding to 4194304 (2048x2048) 4m pixels, 16777216 (4096x4096) 2m pixels, 67108864 (8192x8192) 1m pixels, and 268435456 (16384x16384) half meter pixels. Each tile is created from 65536 (256x256) pixels. Altogether, that's 23,364,622,090,240 (23 trillion) pixels where each pixel takes up around 4 bytes so 93,458,488,360,960 (93 TB of RAM). The work images now are bounded to the extents of the source imagery so it's probably not quite that large but still frighteningly large. If you had images in 2 different sections, you'd have problems.

The next IMC is programmed so it doesn't create work images but down sampling this far is still not suggested as you'd have to cache your entire imagery dataset to generate 1 tile.

Thanks Mr. Iverson,

I'm trying now with 128 max now and the discovery phase is still taking a while. Do you think this max res is acceptable with z16-z20 or do I need to go to a lower resolution?

You mentioned the next IMC. Any idea on a release date?

Thanks, Brandon

Update: Max Res 128 worked! Thanks again

Brandon1107 wrote:
Discovery phase is consistent regardless of the resolution. There's just a lot of images to read through and the library that's used for reading can't extract dimensions without reading the entire image.

No idea on the release date at this time.