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-2.20.tar.gz https://ftp.gnu.org/gnu/gama/gama-2.20.tar.gz.sig Use a mirror for higher download bandwidth: https://ftpmirror.gnu.org/gama/gama-2.20.tar.gz https://ftpmirror.gnu.org/gama/gama-2.20.tar.gz.sig Here are the SHA1 and SHA256 checksums: b41a591c3be99553a1bdef7b2f1cc983a7ff1cfc gama-2.20.tar.gz CIQa2hu+O0WVseVd+B+MxXUk5TLdQJVQpbu0GaNHPsM gama-2.20.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-2.20.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 2.20 (2022-06-30) - The new algorithm ICGS (iterated classical Gram-Schmidt) in the class AdjGSO replaced the former algorithm MGS (modified Gram-Schmidt), which was implemented with column pivoting as a template class GSO. The template class GSO is meant only as a tool for testing purposes. Both initial scaling and pivoting with euclidean norms are not suitable for practical computations. The old legacy code with MGS used in the AdjGSO class is still available with conditional compilation directive statements if the name GNU_GAMA_GSO_LEGACY_CODE is defined.
