Fly Throughs

Document No:  D12#434494
Revision:  3A
Date amended:  14-May-2015
The information below is intended to reflect the preferred practice of Main Roads Western Australia ("Main Roads"). Main Roads reserves the right to update this information at any time without notice. If you have any questions or comments please contact Nathan Miller by e-mail or ph (08) 9323 4669.

To the extent permitted by law, Main Roads, its employees, agents, authors and contributors are not liable for any loss resulting from any action taken or reliance made by you on the information herein displayed.


Revision Register

Ed/Version Number Clause Number Description of Revision Date
ISSUE 1 All Guideline Developed 10/06/03 
ISSUE 2 All Page Name Changed 01/06/03 
​ISSUE 3 ​Header ​Changed Document Number to reflect changes in TRIM File ​16/06/2014
​ISSUE 3A​Header​Guideline introduction amended.​14/05/2015

Table of Content

1 General

Perspective images and fly throughs are computer generated three dimensional models that can allow the user to interactively investigate and view the earths surface. Main Roads project managers have used fly throughs and perspectives to investigate and present final road designs. A major benefit with fly through software, is that it allows road designs to be checked before it is built. This process allows stakeholders involved in the design and approval process to view the issues associated with the road design without multiple visits to site or interpreting two dimensional road design plans. Fly throughs and perspectives are additionally an effective tool in presenting information in meetings and at public displays.

Fly throughs can be programmed to automatically traverse the earths surface over predetermined routes to vantage points. A snap shot or vantage point enables "perspective" images (similar to oblique photographs) to be created and printed.

Recent software and computing power development have made fly through technology easier to use, more affordable and an efficient road design tool.

Perspectives and fly throughs are created by draping aerial photography or satellite imagery over three dimensional digital survey data (digital terrain model).  This allows Main Roads project managers to view terrain in three dimensions and to investigate the impact of road designs.  As fly throughs are georeferenced it can additionally allow other data sets to be overlayed such as property boundaries, alternative road designs, alignments, contours, road furniture, place names etc to enhance the information being presented.


2 Where can Main Roads project managers find perspectives and fly throughs?

As with all imagery, a small number of perspectives and fly throughs are available through the Main Roads Survey and Mapping image library.  These consist of previous Main Roads projects that can be viewed or demonstrated by arrangement with the Senior Mapping Surveyor.


3 How to obtain perspectives and fly throughs

Perspectives and fly throughs can be produced through a number of survey consultants.  There is additionally a number of different software packages that offer slightly different functions.  To provide advice on your fly through requirements, please contact the Senior Mapping Surveyor.


4 Cost

Cost can vary greatly depending on data availability.  However, recent experience has shown that fly throughs can be very cost efficient.  Models can be copied onto disk and uploaded into PC's for demonstrations.   Fly through software packages are becoming very simple use, with users of little or no experience to fly around the model and view it from different elevations and directions.