When the interpretation is finally completed, a report is usually prepared, often both for submission in writing and for oral presentation. In some ways this is the most difficult and most important task of the interpreter. He must present his findings in such a way that the appropriate course of action is defined as possible. The important aspects should not be obscured by presenting a mass of details nor should they be distorted by presenting carefully selected but non-representative maps and sections. Evidences to support significant conclusions should be given. Alternate interpretations should be presented and an estimate given of the reliability of the results and conclusions. Finally the interpreter should recommend what further action should be undertaken.