Abstract: A computer-implemented method for generating an image-textured digital surface model (DSM) for a geographical area of interest including both buildings and terrain may include using a computer to generate a digital elevation model (DEM) of both the buildings and terrain for the geographical area of interest. The method may further include providing a collection of optical images including oblique optical images for the geographical area of interest including both buildings and terrain. The computer may also be used to selectively superimpose oblique optical images from the collection of optical images onto the DEM of both the buildings and terrain for the geographical area of interest and to thereby generate the image-textured DSM for the geographical area of interest including both buildings and terrain.

Abstract: A system and method determines a Line-of-Sight volume for a specified point within a three dimensional model. Each data file includes data about geometric entities that make-up a geographic feature that may impact a Line-of-Sight from a focus. A processor is operative for processing the data files and creating a series of polygons that represent a shell of a Line-of-Sight volume to the focus at a specified resolution based on the process data files.