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Flying for multispectral and RGB analysis, we submit hundreds of photos that are stitched together by a third party and send back to me in a Tif file. Naturally, when I open it Preview is the only app I have. It opens and I can see the image, but the instant I click on the size or any think I get that perpetual little spinning disk. The file in over 900Mb. Perhaps another application to open Tif.?
DroneFarmer wrote:
Flying for multispectral and RGB analysis, we submit hundreds of photos that are stitched together by a third party and send back to me in a Tif file. Naturally, when I open it Preview is the only app I have. It opens and I can see the image, but the instant I click on the size or any think I get that perpetual little spinning disk. The file in over 900Mb. Perhaps another application to open Tif.?
Preview is pretty simplistic when it comes to opening files. It just reads the image into memory and opens it. It needs to have enough memory for the uncompressed file. So a 900MB file is probably really big.
Plus, Preview can't handle funky TIF files. There was a recent problem where it couldn't even handle panchromatic TIF files, but I think they may have fixed that.
If you're able to open the file at all, you're doing pretty well.
It just so happens that you might be in luck. I just happen to be actively working on an app that views these kinds of GIS images. Google me and send me an e-mail. The app isn't done yet, but it will open images, show metadata, and zoom in. One of my test images is a 1.28 GB TIF. I can open that on an iPhone. I wouldn't be able to distribute an iPhone app yet. Too many App Store/Test Flight hoops to jump through. But I could give you the Mac version.
DroneFarmer wrote:
Flying for multispectral and RGB analysis, we submit hundreds of photos that are stitched together by a third party and send back to me in a Tif file. Naturally, when I open it Preview is the only app I have. It opens and I can see the image, but the instant I click on the size or any think I get that perpetual little spinning disk. The file in over 900Mb. Perhaps another application to open Tif.?
Preview is pretty simplistic when it comes to opening files. It just reads the image into memory and opens it. It needs to have enough memory for the uncompressed file. So a 900MB file is probably really big.
Plus, Preview can't handle funky TIF files. There was a recent problem where it couldn't even handle panchromatic TIF files, but I think they may have fixed that.
If you're able to open the file at all, you're doing pretty well.
It just so happens that you might be in luck. I just happen to be actively working on an app that views these kinds of GIS images. Google me and send me an e-mail. The app isn't done yet, but it will open images, show metadata, and zoom in. One of my test images is a 1.28 GB TIF. I can open that on an iPhone. I wouldn't be able to distribute an iPhone app yet. Too many App Store/Test Flight hoops to jump through. But I could give you the Mac version.
DroneFarmer wrote:
Sounds Good, Ill try to make contact. Hey - i can even send you a copy of the file. Its an RGB aerial photo of a field. If I could open it, it should be zoomable to pixel of 1.8 cm.
Great! I'm always happy to try real-world data. Plus, I would really appreciate someone's perspective from the drone community. My background is mainly satellites, with some aerial data from USDA. These new apps I'm working on are geared towards "citizen science" folks and others who want to use advanced imagery but don't have corporate or government budgets.
So continuing to explore the Preview problem, it occurred to me that my Mac man not have enough memory.
This laptop has the M1-Pro chip and 16GB of memory. I wonder if I can beef tis up?
Any comments or ideas?
I would have a hard time moving to a Windows machine.
Your Mac's fine. Preview just isn't very sophisticated. They did name it "Preview" after all.
A 900 MB file is pretty substantial. That's probably compressed. The image is likely 25,000 pixels in both dimensions. Even an 8 bit RGB image that big would require an image buffer of 2.5GB. You have that much RAM and you can open the image. But things get complicated once you zoom in. Apple likes to do everything on the GPU, which is great because it's really fast. But it's not designed for images this big.
Apple devices don't have a big presence in the GIS world. That's why I'm interested in it. Relatively small market, but zero competition. And I'm very familiar with the domain.
With big images, you can get away with high-end image editing tools. You might have better luck with Adobe, Pixelmator Pro, or one of the Affinity apps. Adobe is expensive, of course. I use Pixelmator quite a bit. If you're familiar with Windows, then you mike like Affinity. These types of tools can handle very large images like this. And they can handle some, but not all, of the more advanced formats common in the GIS community. But you wouldn't get much for GIS-centric metadata like footprints. Usually the best they can do is GPS location. They don't know anything about cloud cover, sun azimuth, atmospheric conditions, etc.
Macs using Apple Silicon cannot have their RAM expanded. It's part of the CPU. As was suggested by the others, another app will probably serve you better.
Regards.
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So continuing to explore the Preview problem, it occurred to me that my Mac man not have enough memory.
This laptop has the M1-Pro chip and 16GB of memory. I wonder if I can beef tis up?
Any comments or ideas?
I would have a hard time moving to a Windows machine.
Sounds Good, Ill try to make contact. Hey - i can even send you a copy of the file. Its an RGB aerial photo of a field. If I could open it, it should be zoomable to pixel of 1.8 cm.
Sounds Good, Ill try to make contact. Hey - i can even send you a copy of the file. Its an RGB aerial photo of a field. If I could open it, it should be zoomable to pixel of 1.8 cm.
Using Preview for tif files
