The Defence Surveyors' Association, or DSA, is a registered charity whose principal objectives are:
1. Promote the sharing of knowledge of current and past achievements, future development and potential opportunities in the areas of defence surveying, mapping, charting and geospatial intelligence.
2. Recognise and reward excellence and achievement within the DSA area of interest within the armed forces and related institutions with the awarding of prizes.
3. Support events to encourage socialising and networking across the defence geographic community.
4. Support activities to preserve the defence surveying, mapping, charting and geospatial heritage.