The bearing lines are drawn on the paper on the table. Distances to the points are measured and then converted to the required scale on the survey sheet. Radiation surveying can be performed in a similar way directly on the ground taking bearings and distances from a fixed position and recording them for later work. Similarly plane table surveying may be used with other techniques such as a traverse or triangulation. Exercises on techniques of surveying are in the Practical Activities section of this topic.
Surveyors always check and double check the data to record.
Look at the pattern.