In this methodological manual, the procedure for creating a digital model of the relief and the situation . is considered. The exercises described in the manual are based on the use of the CREDO LINE STUDIES program. The manual also provides brief information about the basic principles of work in the CREDO LINE STUDIES program (versions CREDO LINE STUDIES 1. 20). The methodical manual is intended for students of specialty 1-56 02 01 "Geodesy" . The full version of the educational and methodological complex is available on CD in the student reading room No. 1 (I.) Wheel 16, k. 301).