Sources of Error in Theodolite Work | Theodolite Surveying | Surveying
Sources of error in theodolite work are classified into three groups: 1. Instrumental Errors 2. Observational Errors 3. Natural Errors. Source # 1. Instrumental Errors: (i) Non-adjustment of plate levels: If the plate levels which are not perpendicular to the vertical axis, are centered, the vertical axis of the instrument is not made truly vertical. As a result, the horizontal [...]