Development and evaluation of symbology to identify individual dismounted soldiers

Mise au point et évaluation d'une symbologie pour identifier les soldats débarqués


  1. McFadden, S.M.
  2. Robson, J.
  3. Tack, D.W.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN);Array Systems Computing Inc, Toronto Ont (CAN)
The North Atlantic Treaty Organization (NATO) Land Capability Group 1 (LCG 1) has identified a need to develop and validate symbology for the individual soldier that can be displayed on a wide range of digital displays. Prototype symbology sets for this purpose have been developed by several NATO nations. A heuristic evaluation of these sets indicated that none of them were entirely consistent with good human factors practice. A new set (CHARLIE) was developed that conformed more closely to human factors guidelines. To further evaluate the most suitable symbology, an empirical assessment was carried out. Two different sizes of three prototype symbol sets were evaluated against backgrounds composed of digital photographic images of differing complexity and digitized paper maps under two different display resolutions. The symbol sets evaluated were the CHARLIE set discussed above, and two variants (ALPHA and BRAVO) of a set designed by NATO LCG1. The symbols were evaluated using a visual search task with accuracy and speed of response as the measures of performance. The results indicated that detection and discrimination of the CHARLIE symbols was significantly faster under all of the conditions tested and significantly more accurate with low resolution displays. Moreover, performance with the CHARLIE symbols was consistent across all the conditions tested (background, resolution, and symbol size).

Il y a un résumé en français ici.

symbology;NATO;Land Forces;maps;resolution;symbol size;digital imagery;background complexity;legibility;visibility;visual search;accuracy;response time
Report Number
DRDC-TORONTO-CR-2010-152 — Contractor Report
Date of publication
01 Dec 2011
Number of Pages
Electronic Document(PDF)

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