About GNU Gama package is dedicated to adjustment of geodetic networks. It is intended for use with traditional geodetic surveyings which are still used and needed in special measurements (e.g., underground or high precision engineering measurements) where the Global Positioning System (GPS) cannot be used. Adjustment in local coordinate systems is fully supported by a command-line program gama-local that adjusts geodetic (free) networks of observed distances, directions, angles, height differences, 3D vectors and observed coordinates (coordinates with given variance-covariance matrix). Adjustment in global coordinate systems is supported only partly as a gama-g3 program. https://www.gnu.org/software/gama/ Here are the compressed sources and a GPG detached signature[*]: https://ftp.gnu.org/gnu/gama/gama-2.19.tar.gz https://ftp.gnu.org/gnu/gama/gama-2.19.tar.gz.sig Use a mirror for higher download bandwidth: https://ftpmirror.gnu.org/gama/gama-2.19.tar.gz https://ftpmirror.gnu.org/gama/gama-2.19.tar.gz.sig Here are the SHA1 and SHA256 checksums: 8dc59de99ee93e2a770b2f9f0bfdcb518e0dc9d4 gama-2.19.tar.gz OCyUcKkQzp1nz9lgGSR4MRrP7XBR1kpIfPEA7PdSA1I gama-2.19.tar.gz The SHA256 checksum is base64 encoded, instead of the hexadecimal encoding that most checksum tools default to. [*] Use a .sig file to verify that the corresponding file (without the .sig suffix) is intact. First, be sure to download both the .sig file and the corresponding tarball. Then, run a command like this: gpg --verify gama-2.19.tar.gz.sig If that command fails because you don't have the required public key, or that public key has expired, try the following commands to update or refresh it, and then rerun the 'gpg --verify' command. gpg --recv-keys c6e1824e0180b85f31b06b6acb6ce60d1b77fc09 NEWS Changes in release 2.19 (2022-04-26) - fixed a bug in HTML output of adjustment results for GNSS vectors in inconsistent coordinates systems. - added new test to GNU Gama Test Suite.