The SCALGO Model software package contains a number of modules for constructing raster and TIN terrain models from massive point data sets and quantifying the quality of constructed raster models.
The package supports most common raster terrain data formats including geotiff-, img-, bil- and asc-files, as well as a simple text and a binary TIN terrain data format. It supports (LIDAR) point data in the common LAS and in simple text formats. Furthermore, large data sets that are broken up into a mosaic of many smaller tiles can also be read and written effortlessly. The software package consists of the following modules, which can be run from a standalone graphical user interface or from a toolbox within ArcGIS.
Constructs a Triangulated Irregular Network (TIN) terrain model from a set of (LIDAR) terrain points. The model is constructed by computing a (Delaunay) triangulation of the 2D projection of the input points and lifting it back to 3D.
Constructs a raster terrain model from a set of (LiDAR) terrain points by interpolating the required (raster cell) positions. The interpolation is performed by constructing a TIN model and then using linear interpolation over the triangles.
Quantifies the quality of a raster terrain model constructed from a set of (LIDAR) terrain points. Given a set of points and a raster description, the module constructs a raster as described where each raster cell stores the distance from the center of the cell to the nearest input point.