MHM, for Multiscale Heterogeneity Map, is a convenient tool aiming at analysing almost every kind of surface patterns. It focuses on a multiscale analysis and offers multiscale maps and profiles of the mostly used pattern indices. This method is summarized within a coherent opensource software that makes analyses very friendly for ecological, remote sensing and even biological or physical studies. MHM is fully complementary to geostatistical tools (dedicated to point-pattern analyses) or to Fragstats modules (generally offering monoscale analyses) and focuses on patchy mosaics. MHM software has been developed from Gaucherel’s Matlab® routines (see references) and has been recently transformed into an open Java® multiplatform software (see developer forum). MHM works with images saved in raster mode and deliverates quantified indices in similar and different formats.