VISUALISATION TECHNIQUES

This article gives an account of the value of computer techniques that can be used to visualise proposed construction developments. Two basic methods are used: wire line drawings and shaded pictures, which may be in colour. These are superimposed on photographs of the area concerned. Wire line drawings can be generated on storage tubes, drum plotters and flatbed plotters. The program allows the view to be changed by changing perspective angle, size, position of the eye, position of the viewed point, sealing factor and stereoscopic views. The view can also be incrementally changed by rotations and shifts. True plans, elevations and isometrics can also be obtained. Shaded pictures are obtained by photographing the display screen. The picture can be changed in the same way as the wire line drawings. The position of the light, material properties (such as glass, concrete and highly reflective surfaces) and background shade can also be changed. A brief account is given of the generation of a model which can be facilitated, by means of computer aids, or obtained directly from the designer's drawings. Advantages of the system are the wide variety of views that can be quickly produced at low cost. However, the size of model is limited (at present to about 1000 points and 800 planes). There are several examples including highway projects. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/011724421
• Corporate Authors:

  Department of the Environment

  Room 1640 Lunar House, 40 Wellesley Road
  Croydon CR9 2EL,   England 
• Authors:
  • Lyons, J W
  • Stokes, S T
• Publication Date: 1976-9

Language

• English

Media Info

• Features: Figures; Photos;
• Pagination: p. 23-26
• Serial:
  • DOE Construction
  • Issue Number: 19

Subject/Index Terms

• TRT Terms: Costs; Digital computers; Highway planning; Highways; Information processing; Mathematical models; Photography; Programming (Planning); Structures; Visual aids; Visual display units (Computers)
• Uncontrolled Terms: Models
• Old TRIS Terms: V d u
• ITRD Terms: 3352: Building (structure); 224: Cost; 8673: Digital computer; 2755: Highway; 6205: Model (not math); 8630: Visual display
• Subject Areas: Administration and Management; Bridges and other structures; Finance; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00149102
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0 117244 21
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Jul 2 1977 12:00AM