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Subject: gama-2.18 released [stable]

From: Ales Cepek
Subject: Subject: gama-2.18 released [stable]
Date: Tue, 12 Apr 2022 18:30:56 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0

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.
Here are the compressed sources and a GPG detached signature[*]:
Use a mirror for higher download bandwidth:
Here are the SHA1 and SHA256 checksums:
94cf28c7e0ef451a9f30b7900816548857e53c3c  gama-2.18.tar.gz
XNi7SmeE4zk81kAHWtIWL7Z1jnTqeAe71y2WuMvgXQ0  gama-2.18.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-2.18.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 1b77fc09
Changes in release 2.18 (2022-04-09)
New conversion class K2gkf (lib/krumm) with accompanying program
krumm2gama-local and the testing suite for converting input data
format used in the text book "Geodetic Network Adjustment Examples" by
Friedhelm Krumm, Geodätisches Institut Universität Stuttgart, 2020.
Not all input data in Krumm Format can be converted to GNU Gama,
i.e. to the adjustment program gama-local input XML:
* scale factor is not implemented in gama-local adjustment
* gama-local does not enable fixing only x coordinate (or y
  coordinate) for 2D free network to remove singularity. This kind
  of regularization has very little practical meaning. Technically
  it would be possible to enable this feature in gama-local, but it
  is questionable if the outcome would not enable more confusion
  than possible outcome. Adustment should not be dependent on the
  coordinate system used.
* gama-local does not deduce that an azimuth to the unknown point
  P can be combined with some angle pointing to the P to create a
  new feigned azimuth. This is an interesting feature which may
  be implemented in some future version, namely in the gama-local
  stage of computing approximate coordinates.
* nonlinear conditions are not implemented in gama-local
* BLH coordinates are not supported in gama-local

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