The Institution of surveyors of Tanzania (IST) is a national non−governmental professional organization registered in Tanzania; basically, endeavoring to promote the practices of surveying and mapping, ensuring that the relevant disciplines and all who practice them meet the needs and aspirations of the individuals,communities, public and private industries that they serve.
IST was originally established in 1982 when its member professions comprised of land surveyors and land economy surveyors (land managers and Valuers). In April, 1997, the land economy members decided to dissociate themselves from IST and form their own organization which came to be, and still is, known as:
Tanzania Institution of Valuers and Estate Agents (TIVEA).
From then IST has remained a professional organization solely for land surveyors.