An expert witness is a person whose opinion is admitted as evidence in a judicial hearing because of their special skills, experience and/or education, in a field of specialization.
This is contrary to the general rule that mere opinions are irrelevant in a court of law.
A Land Surveyor may be hired as an expert witness to perform one or more of the following functions:
Consultation – The surveyor gathers all relevant facts together with any necessary field investigations and calculations. He then provides a report to the lawyer, outlining his findings and recommendations. The lawyer with all facts in hand can now decide whether or not to continue the action
Case Preparation – If a case is to proceed to court a surveyor may assist the lawyer by conveying some basic understanding of the technical factors and preparing any maps or plans that are needed in presenting the evidence in court.
Trial Assistance – During a court hearing the surveyor may assist the lawyer by pointing out technical weaknesses in the oppositions’ case and suggesting possible questioning of opposing experts.