During the first thirty years of Atlas Florae Europaeae (AFE), the basic technology for the collection of distribution data and publication of distribution maps has remained practically unchanged. Manual map production as such is rather tedious. Furthermore, distribution data available only on printed maps are not suitable for further (computerized) analyses. The construction of the Atlas Florae Europaeae database was started in 1992. The primary goal was to make the distribution data available in digital format, and the additional goal was the computerization of the editorial process of AFE. The printed AFE distribution maps were processed this way: - the maps were scanned at 300 dpi resolution / - locations of the grid cells (4419) were calculated on the scanned bitmap images / - arrays of black pixels were searched from the bitmaps using custom software / - the map originals and and their interpretation were compared using custom software. So far all printed AFE volumes (1 to 12) have been processed this way. ... [Information of the supplier]
Hier haben Sie die Möglichkeit, nach in den gemäßigten Klimazonen beheimateten Farnen zu suchen und sich jeweils deren Eigenschaften anzuschauen. [Information des Anbieters]
Selection of morphological traits from pull down-menus allows the identification of Great Britain's about 60 fern species. Most of the species occur in Central Europe as well. [Editorial staff vifabio]
Ferns are a conspicuous element of the vegetation of most tropical regions. They occur in a wide variety of habitats from freshwater ponds and swamp areas to terrestrial plants in forest at all altitudes to lithophytic on rocks or epiphytic on tree trunks or branches. They are frequently overlooked in biodiversity surveys, in part because they are difficult to identify for the non-specialist. In this website we hope to address this problem and to promote Southeast Asian ferns as an integral part of Asia’s vascular plant diversity. This website aims to provide comprehensive lists of all species of ferns known from Thailand, Laos and Cambodia; provide a Factsheet for each species which lists such information as the correct name and its synonym(s), a description, its distribution and its conservation status; and to provide a multi-access key to identify all species. The information contained within this website is only as good as the information that has become available through fieldwork and herbarium collections made. Laos and Cambodia have amongst the lowest plant collection densities for Asia so it is very likely that many species will eventually be found in those countries that have yet to be recorded. Even for Thailand new records and new species are regularly reported. We hope to ensure that this website is kept up-to-date with new discoveries as and when they are reported. ... [Information of the supplier]