The input data format for a local geodetic network adjustment (program
gama-local) is defined in accordance with the definition of Extended
Markup Language (XML) for description of structured data.
The XML definition can be found at
Input data (points, observations and other related information) are
described using XML start-end pair tags
and empty-element tags
<xxx/>. The syntax of XML input format is
defined in the Document Type Definition (DTD) at
and can formally be validated independently on the program
For parsing the XML input data,
gama-local uses the XML parser
Expat copyrighted by James Clark which is described at
Expat is subject to the Mozilla Public License (MPL), or may
alternatively be used under the GNU General Public License (GPL)
gama-local XML input, distances are given in meters,
angular values in centigrades and their standard deviations (rms
errors) in millimeters or centigrade seconds, respectively.
Alternatively angular values in
gama-local XML input can be
given in degrees and seconds (see Angular units). At the end of
this chapter an example of the
gama-local XML input data
object is given.