Event maps and thematic change (evolution) maps indicate that some process happened that changed the area at a location from one class to the other. For example, a burnt area map indicates locations where vegetation has been burnt by a fire and changed to bare ground. A typical mapping method is the use of pre- and post-event satellite images for detection of the areas affected by the process. Eventually burnt areas contain identifiable burn marks that allow direct identification in one single post-event satellite image. Nevertheless, it is the process that is central to the analysis. Similarly, the concepts aforestation and deforestation would fall under the heading "Event maps." They may come from a comparison of two status maps of different dates. Some processes benefit from analysis of more than two states. Such change evolution maps can be produced with time-series analysis. On land, more examples include landslide maps, flooded area maps and other land surface dynamics (e.g. aforestation and deforestation). Further, change detection maps are available for other domains (atmosphere, marine, land, climate, etc.)