Pricing
MT3D-USGS pricing
As usgs.gov lists them, read 14 Nov 2026. The maker's own page has the final word.
| Plan | Billed and limits | Price |
|---|---|---|
| MT3D-USGS | No fee or cost stated; use, copy, modify, or distribute subject to USGS User's Rights Notice | Free |
From usgs.gov.