Why is FRAGSTATS unable to allocate sufficient memory?
FRAGSTATS is a compute-intensive program; its performance is dependent on both processor speed and computer memory (RAM). Ultimately, the ability to process an image is dependent on the availability of sufficient memory; the speed of processing that image is dependent on processor speed. Of particular note is the memory constraint. FRAGSTATS loads the input grid into memory and then computes all requested calculations. Thus, you must have sufficient memory to load the grid and then enough leftover for processing and other operating system needs. Memory requirements are affected by grid size, number of patches and number of classes. Of partiuclar importance is the number of patches, which can vary by orders of magnitude from one application to another. To determine whether you have enough memory based solely on grid size, you can use the following formula: #cells*4bytes. Thus, if you have a 256 rows by 256 columns grid, the minimum memory needed is 256 kb (256*256*4/1024 bytes/kb). Howe
