Reducing file size of Orthomosaics

[philnesterovic]

Hi all,

I'm looking for a way to reduce the size of the orthomosaics we've produced. They're ~200 acre plots of land. We already export them as JPEGs.

Does anybody have a suggestion of how to process them differently, or a program that can compress the jpegs to a smaller size?

We're currently producing orthomosaics around 200-250MB and would like to have them in the 50-100MB range.

Thanks!

[Alexey Pasumansky]

Hello philnesterovic,

To reduce the size of the orthomosaic you can use several options:

- use lower JPG quality option in the Export Orthomosaic dialog,
- use lower export resolution (m/pix),
- split the export into tiles of the smaller size (using Split in Blocks option).

[rossnixon]

I find ECW to be the best format when wanting to reduce file sizes by a large amount. Typically they will be a twentieth of the size of an uncompressed image.

[orellius]

Sorry reviving this old topic. I've searched around and can't find answer. There's multiple mentions on Agisoft forums of people recommending ECW format for smaller size orthomosaics. But I can't for the life of me find how to export one in that format, PhotoScan doesn't seem to support the file at export stage.

Is this even a feature or are people using some other software to convert to ECW?

[Alexey Pasumansky]

Hello orellius,

Currently PhotoScan doesn't support direct ECW export.