Seimic data collection techniques and processing have improved a great deal during the last twenty yearsand the land surveyor has had to make use of all available technology to keep pace with the production and quality requirements of the positional data. The geophysical exploration industry is a multi-discipline science involving the interpretation of data collected from various sources and locations. To obtain the maximum benefit from these data the relationship between the locations must be known and presented inn an unambiguous way so that it can be used with confidence by all concerned. from the initial seismic survey throught o the final positioning of the well sites. This task is the responsibility of the land surveyor and this paper discusses the procedures and instrumentation currently being employed in the land data collection operations in Africaand the Middle East by Halliburton Geophysical Services.