File format with .LAS extension contains LIDAR (light detection and ranging) data stored in binary format. This format is a result of efforts to standardize LIDAR data formats undertaken by ASPRS (American Society for Photogrammetry and Remote Sensing). This format greatly simplifies exchange of information between suppliers and recepients. Introduction of LAS format allowed simplification of inherent complexities in LIDAR data.

LAS format stores data collected by light sensors. Those sensors illuminate the target with laser light and measure the reflected and scattered light to generate three-dimensional image of targeted object. This method is commonly used to create accurate terrain maps.