GNU Gama
GNU Gama package is dedicated to the adjustment of surveying 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 (engineering geodesy), where the Global Positioning System (GPS) cannot be used.
Adjustment in the local Cartesian coordinate systems is fully
supported by the command-line program gama-local
that
adjusts surveying (free) networks of observed distances, directions,
angles, height differences, 3D vectors and observed coordinates
(coordinates with given variance-covariance matrix). You can use any
orientation of XY axes and observed directions.
Adjustment in global coordinate systems is supported by
gama-g3
program for observed 3D vectors, distances and
coordinates.
Requirements
For parsing XML documents Gama uses XML parser expat
,
originally written by James Clark. If for any reason expat
library is not installed on your system, Gama still can be compiled
and built with old version 1.1 of expat
, that is distributed
with Gama (make dep-expat-1.1; make
).
XML parser expat
is not part of GNU Gama,
but is used with GNU Gama.
GNU Gama requires adjustment input data in XML format, see documentation for details.
Download
GNU Gama can be found in the subdirectory
/gnu/gama/
on any of GNU FTP server mirrors
https://ftpmirror.gnu.org/gama.
All archive files on GNU FTP server mirrors are gpg signed. Read https://ftp.gnu.org/ how to verify the signature files.
Git
To get anonymous read-only access to the GIT repository for the latest GNU Gama source, issue the following command
git clone git://git.sv.gnu.org/gama.git
If you are interested in a Qt based GUI Qgama, build the application by following the steps given below.
git clone git://git.sv.gnu.org/gama/qt.git cd qt git clone git://git.sv.gnu.org/gama.git mkdir build cd build export CMAKE_PREFIX_PATH=~/Qt/6.0.1/gcc_64/ # export path to Qt cmake .. -G Ninja cmake --build .
The collection of sample networks is available separately. To checkout the gama-local
examples from GIT use the
command
git clone git://git.sv.gnu.org/gama/examples.git
Documentation
The manual is available online in several formats.
Related projects
Qgama
Qgama is a Qt application for adjustment of geodetic networks with database support, where the database can be a simple SQLite3 flat file, used for storing geodetic network data, or any full-featured relational DBMS with Qt driver available like PostgreSQL or MySQL. It is build on the GNU gama adjustment library
Binary builds for Windows
-
Qgama binary builds for Windows (including command line tools
gama-local
andgama-g3
) are available from https://ftp.gnu.org/gnu/gama/windows/.
Contact us
GNU Gama has two moderated mailing lists:
- <info-gama@gnu.org> for announcements and discussion about GNU Gama;
- <bug-gama@gnu.org> to which you should send a mail whenever you find bugs, and have suggestions, ideas or questions related to GNU Gama. Whenever you report a bug, please include enough information so that we can understand what happened and even reproduce your problem in our machines. Excessive information is always better than no information.
If you prefer, you can always directly contact Aleš Čepek.