Abstract
Research of semiotic aspects Lithuanian military air navigation charts was
based on the semantic, graphic and information load analysis. The aim of semantic
analysis was to determine how the conventional cartographical symbols, used in air
navigation charts, correspond with carto-linguistic and carto-semiotic requirements. The
analysis of all the markings was performed complex and collected by questionnaire were
interviewed various respondents: pilots, cartographers and other chart users.
The researches seek two aims: evaluate information and graphical load of military
air navigation charts. Information load evaluated to calculate all objects and phenomenon,
which was in 25 cm² of map. Charts analysis showed that in low
flight charts (LFC)
average information load are 4 – 5 times richer than in the operational maps. Map signs
optimization on LFC has to be managed very carefully, choosing signs that can reduce
the load of information and helps for the information transfer process. Graphical load
of maps evaluated of aeronautical maps is not great (5 – 12%) and does not require
reduction the information load and generalization of charts. Air navigation charts analysis
pointed that not all air navigation sings correspond carto-semiotic requirements and must
be improved. The authors suggested some new sings for military air navigation chart,
which are simpler, equivalent to human psychophysical perception criteria, creates faster
communication and less load on the chart.
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