Limits of precision in chain and tape surveys depend upon many factors like Nature of terrain, equipment and accessories, time and resources, weather conditions and importance of the job. The limit of precision expressed as 1: n, where higher value of n shows more precision. The achievable accuracy of a chaining on a rough terrain under conductive conditions – 1:250 Under good conditions – 1:500 Tested chain under excellent conditions = 1:1000 For steel tape under good conditions – 1:2000 For invart tape with accessories – 1:10000