Descriptive Geometry 1

Lecture Descriptive Geometry I WS 2020/21, Part 1 of the module: Perception and Representation I for the courses in architecture, civil engineering and teaching degree in construction / wood technology - compulsory module in the 1st or 2nd semester

Descriptive Geometry 1 – WS 2020/21

Axonometrie von Katrin Ehrlich
Sectional axonometry with shadows using the example of the villa E.1027 by Eileen Gray in Roquebrune-Cap-Martin, France by Katrin Ehrlich, WS 2019/20

Lecture Descriptive Geometry 1
Mon 10:00 am - 11:30 online in ZOOM via OLAT 

Tutorial Descriptive Geometry 1
Tutoring in small groups on three dates:

Mon. 12:00 p.m. - 1:30 p.m., 2 p.m. - 3.30 p.m., 4:00 p.m. - 5:30 p.m.

Group division via OLAT course

Beginning of lecture and tutorial: Monday, 2nd November 2020

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During winter semester 2020/21 all students have to work on in three exercises, which are prepared in lectures and tutorials and have to be delivered. The tasks of the exercises to be worked on are published on the date of issue in the OLAT course. Hand drawings by pencil are required. After the corrections the students get them back with remarks.

In order to pass the module / sub-module, the successful completion of the three exercises (at least grade 4.0 in each exercise) and the passing of the exam are necessary.

Examples of the 1st exercise on the topic: From 2D figures to 3D objects and their 2D representation

A spatial composition was developed from the 2D outline figure. The high variety of possible solutions show the problems of spatial thinking with the help of two-dimensional drawings. The designed 3D composition was presented in a cardboard model, in drawings of assigned othogonal views, an axonometry and a digital 3D model by SketchUp. In this way the students should get aware of the spatial interpretation of the 2D drawings.


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Examples of the 2nd exercise on the topic: Intersection and unfolding of solids

The task was to develop a spatial composition of three planar bounded solids: two pyramids and a prism, creating lines of intersection between the solids. The shape of one pyramid was given. The other pyramid could have a triangular or square base, the prism a triangular base with vertical or horizontal edges. The intersections of the three solids were to be constructed in 2D drawings, the true shape of the various surfaces was to be determined with the intersection lines, and the unfolding was to be drawn as a mesh, as contiguous as possible, with adhesive edges.


teaser2_homepage_ue3_ws2021.jpgExamples of the 3rd exercise on the topic:  axonometries with light and shadow 

The residential house of Lina Bo Bardi in São Paulo "Casa de Vidro", built in 1950-52, was given in floor plans, elevations and sections and had to be presented in different axonometric variations with light and shadow using a realistic position of the sun. A construction and presentation drawing was required in each case.

Variant A: Overall axonometry - overall layout of the residential building, location on the hillside

Variant B: Horizontal sectional axonometry - upper floor including furnishings, reference to outdoor space

Variant C: Vertical sectional axonometry - access to the building, location on the hillside

Variant D: Vertical sectional axonometry - atrium, location on the hillside, reference exterior/interior


As part of a teaching plus project (project team member Viyaleta Zhurava and Falk Ahlhelm), some 3D models were created in 2017 - 2019. Developed with animations of the examples in the lecture and tutorial, which are available on the Sketchfab platform to support spatial imagination:

for the book "Geometric Basics of Architectural Representation": Sketchfab CornelieLeopold

for the task-collection: Sketchfab DarstellendeGeometrie


Written examination Descriptive Geometry I:

Monday, 8th March 2021, 8:30 a.m. - 9:30 a.m., sports hall 28-111, cafeteria 3 + 4 and ...

Registration for the exam via the examination office QIS
in the period: 16.11. - 16.12.2020
Cancellation possible via QIS no later than 1st March 2021