Remote Sensing Techniques

AERIAL PHOTOGRAPHY
Aerial Photography (digital and film) is acquired by flying in an established grid pattern over your area of interest at a specific altitude. The flying height, among other factors, determines the accuracy of the mapping products. Aerial photography, when used in stereo pairs, provides a 3D quantitative representation of the terrain (e.g. elevation, slope and features). The biggest advantage to using aerial photography over LiDAR or Satellite is that it can capture all features (visible or Infrared) at higher resolutions.

LiDAR
LiDAR is similar to RADAR with light replacing radio waves. The result is the ability to produce accurate, detailed surface models quickly and often at reduced costs over conventional photogrammetric mapping for medium to large areas. LiDAR can provide extensive information regarding vegetation and other above-ground features, in addition to “seeing” below the vegetation substantially better than photogrammetry, thereby simultaneously mapping the forest floor and modelling the canopy above.

SATELLITE
Imagery from satellite sensors may be used to create maps and visual tools for your project. A mapping specialist can help you determine which satellite sensor is appropriate, and either search for existing imagery, or task a satellite to acquire new images. Satellite imagery is a good source for large areas that do not require engineering scale detail.