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Distribution area of Medicago cancellata (Medicago cancellata M.B.).

Object description Download GIS-layers

Authors:

Experts N.I. Dzyubenko & E.A. Dzyubenko
GIS-expert A.N. Dzyubenko

Date of creation:

17.08.2004

Scale:

1:20,000,000.

Accuracy of map:

The map was created using maps that of scale 1:10,000,000-1:30,000,000.

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, while actual location occurrence is shown by points.

Accuracy of classifier:

Point data were obtained from published sources and herbarium specimens. Polygons are based on published sources, herbarium samples, and field surveys by the authors. Light-colored points represent species locations referenced in published sources. Dark-colored points represent locations from which herbarium samples were taken (N.I. Vavilov Institute, V.L. Komorov Institute of Botany).

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 sources were used to determine the distribution area of this species: N.I. Vavilov Institute, V.L. Komarov Institute, Vasil.chenko (1949), and Grossgheim (1952).

Reference citations:

Grossgheim A.A. 1952. Genus Medicago. Flora of the Caucasus. Vol. 5. Moscow- Leningrad: Academy of Science of the USSR. 177-192 p. (In Russian)
N.I. Vavilov Institute, Herbarium Department, 2003. Database of geographic coordinates (in house), St. Petersburg, Russia.
V.L. Komarov Institute of Botany [LE], St. Petersburg, Russia.
Vasil.chenko I.T. 1949. Alfalfa as the best fodder crop. Leningrad: Academy of Science of the USSR. Series 1. Issue 8. 248 pp.

Rights and copyrights:

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