DSA comprises members from the defence, industry, academe and private sectors who have a collective interest in defence surveying, mapping, charting and geospatial intelligence. The common thread is the application of science and art to geographic interpretation for defence purposes.The aim of the DSA is to promote an understanding and appreciation of defence surveying, mapping, charting and geospatial intelligence in historical, current and future contexts and to keep past and current members of that community in touch with one another