The Survey Association, known generally as TSA, is the trade body for commercial survey companies in the UK. The association was formed in 1979 to give a focus for private sector businesses in land and hydrographic survey. Since TSA moved its Headquarters to Newark in 2006 and established its own Secretariat, the association has grown substantially.

Today, the association has over 130 companies in membership as full, associate, supplier, affiliate or academic members directly involved in the survey business. The full and associate member companies together employ over 2500 people and had a turnover in 2007 of almost £250million.

TSA is governed by an elected Council comprising twelve member companies. The Council is subdivided into four core committees: PR, MIA, Technical and Finance. The role of the Secretariat is to efficiently run the day-to-day operation and liaise with the membership.

The role of the TSA is to promote best practice amongst its members, provide a forum for members for discussion, debate and continuing professional development and, to the wider audience such as engineers, provide guidance on new methods and techniques and a list of suitably qualified and experienced companies.

TSA is also heavily involved in lobbying Government and other agencies such as the Environment Agency regarding policies likely to affect or involve the survey industry.

TSA meets regularly with RICS and ICES on a range of issues and has established a group called the SLG, or Survey Liaison Group. This body convenes at regular intervals to examine matters of mutual interest and to ensure that there is little or no duplication of effort by the three bodies.