Table of Contents INTRODUCTION The following is a step-by-step tutorial of the procedure for extracting a digital surface model (DSM) (also referred to as a digital elevation model, or DEM) from stereo imagery and converting it to a digital terrain model (DTM). A DSM represents the earth’s surface and includes all objects on it, e.g., …
Table of Contents Orthorectified images (orthos) are geometrically corrected and georeferenced imagery. Orthorectification is the process of using a rigorous math model and a digital elevation model (DEM) to correct distortions in raw images. This tutorial outlines the optical satellite orthorectification process using OrthoEngine. This workflow will show how to import data, collect ground control …
