Area of Trifolium apertum (open clover ).

Object description Download GIS-layers


The experts - Dzyubenko N. I., E. A. Dzyubenko.
The GIS-Expert - Dzyubenko A. N.

Date of creation:




Exactness of a map:

The map was created using maps that had the following scale 1:25.000.000-1:40.000.000.

The projection:

"Alber's Equal Area Conic for Russia", 9, 1001, 7, 100, 0, 44, 68, 0, 0.

Basic contents:

Map is a vector file consisting of polygons and points. Points represent locations of species, area of possible distribution of species are represented by polygons.

Accuracy of classifier:

Light-colored points are locations referenced in literature sources. Dark-colored points are locations of species obtained from the herbarium and seed collection of the N.I. Vavilov All-Russian Research Institute of Plant Industry. Polygons are based on literature sources, herbarium samples, political boundaries and ecological description.

Method of map production:

Published literature was reviewed, including Atlases, monographs and papers. Occurrence data were obtained from herbarium specimens, floras, monographs and papers (Grossheim, 1952); (VIR database). Data were then compiled through scanning and geo-referencing to develop a composite vector map. The biologist together with the GIS specialist, drew a new plant distribution area based on compiled data.

Reference citations:

Grossheim A.A. 1952. Genus Trifolium. Flora of the Caucasus. M.-L.: AN USSR. V.5: 194-221. (In Russian)

Rights and copyrights:

Copyright on the map and descriptions belong to its authors;
Copyright on the photos belong to Dzyubenko N.I.

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