Applications of Grid Operations and Map Algebra for GIS-Based Analyses.Implementation of Grid Operations and Map Algebra in GIS Software.Other Types of Map Algebra and Grid Operations.Grid operations are employed in a variety of GIS-based analyses, but are particularly widely used for suitability modeling and environmental analyses. Grid operations can be categorized as data manipulation procedures or within domain-specific applications, such as terrain analysis or image processing. Map Algebra also includes Global and Block function categories. Individual functions within a category vary by applying a different arithmetic, statistical, or other type of operator to the function. The value of a specific grid cell in the output grid for Local functions is determined from the value(s) of the analogous cell position(s) in the input grid(s), for Focal functions from the grid cell values drawn from a neighborhood around the specific output grid cell, and for Zonal functions from a set of grid cells specified in a separate zone grid. Map Algebra is a language for organizing and implementing grid operations in Geographic Information Systems (GIS) software, and is typically categorized into Local, Focal, and Zonal functions, where each function typically ingests one or more grids and outputs a new grid.
Grid operations are manipulation and analytical computations performed on raster data.
0 kommentar(er)
