Area of diffuse clover (Trifolium diffusum Ehrh.).

Object description Download GIS-layers


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

Date of creation:




Accuracy of map:

Map was created based on maps that had the following scale 1:10000000.

The projection:

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

Basic contents:

Vector map. Area of species distribution is shown by polygons and actual location occurrence is shown by points.

Accuracy of classifier:

Point data were obtained from literature sources and herbarium specimens. Light-colored points are locations referenced in literature sources. Dark-colored points are locations of the species that were reported from databases of VIR (N.I. Vavilov Institute) and BIN (V.L. Komarov Institute). Polygons are based on literature sources, herbarium samples, and field surveys by the authors.

Method of map production:

Published literature was reviewed, including Atlases, monographs and papers. Occurrence data were obtained from herbarium specimens, floras, monographs and papers. 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. The following herbaria and sources were used: N.I. Vavilov Institute (2003), V.L. Komarov Institute, Grossgheim (1952).

Reference citations:

Grossheim, A.A. 1952. Genus Trifolium. Flora of the Caucasus. V. 5. Moscow-Leningrad: AN USSR. 194-221 p. (In Russian)
N.I. Vavilov Institute, Herbarium Department, 2003. Database of geographic coordinates (in house), St. Petersburg, Russia.
V.L. Komarov Botanical Institute [LE], St. Petersburg, Russia.

Rights and copyrights:

Copyright on the map and descriptions belong to its authors;
Copyright on the photos belong to Gillett J.M., Taulor N.L., 2001.

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