Visual Simulation
Visual simulation is a term used to describe a graphic or model that portrays a change from the existing condition. Simulations can range from drawings and digitally edited images to complex models and animations. The information presented here focuses on one type of visual simulation: the use of computer image editing techniques to illustrate proposed changes in the landscape.
![Original unedited photograph Original unedited photograph](https://webarchive.library.unt.edu/eot2008/20081204184708im_/http://www.unl.edu/nac/images/simulation/overview1.jpg)
In natural resource planning, being able to simulate a proposed change can be a powerful tool when working with landowners and other decision-makers. Computers now make it possible to create realistic-looking simulations using image editing software.
![Photograph edited to simulate planting of small trees Photograph edited to simulate planting of small trees](https://webarchive.library.unt.edu/eot2008/20081204184708im_/http://www.unl.edu/nac/images/simulation/overview2.jpg)
![Photograph edited to simulate mature trees Photograph edited to simulate mature trees](https://webarchive.library.unt.edu/eot2008/20081204184708im_/http://www.unl.edu/nac/images/simulation/overview3.jpg)
Image editing software digitally alters images to create visual simulations. Digital images of the planning area can be acquired by scanning photographs or taking pictures with a digital camera. The proposed design can then be "created" by adding objects, such as trees, shrubs, grass, and other materials, onto the image of the planning area.
![Photograph edited to simulate mature trees and shrubs Photograph edited to simulate mature trees and shrubs](https://webarchive.library.unt.edu/eot2008/20081204184708im_/http://www.unl.edu/nac/images/simulation/overview4.jpg)
![Photograph edited to simulate mature trees and shrubs Photograph edited to simulate mature trees and shrubs](https://webarchive.library.unt.edu/eot2008/20081204184708im_/http://www.unl.edu/nac/images/simulation/overview5.jpg)
There are many commercially available software programs that can be used to create visual simulations. NAC has developed CanVis, a free image editing program developed specifically for creating natural resource planning simulations.