Relatives

The distribution area of Affined onion (Allium affine Ldb.)

Object description Download GIS-layers

Authors:

The expert botanist - Chukhina I.G.
The GIS-expert - Sinitsyna T.A.

Date of creation:

4.12.2003

Scale:

1:20,000,000

Accuracy of map:

Map is based on data from herbarium specimens and on maps of scale 1:13,000,000

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; areas of possible distribution of species are represented by polygons.

Accuracy of classifier:

Points represent locations of the species referenced in literature and from which herbarium specimens were taken. Polygons are based on generalized information from literature and the locations from which herbarium specimens were taken. Species location data were obtained from a database of site coordinates developed by the N.I. Vavilov Institute (1992) and from the published map in Grossgheim (1940).

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. Map boundaries were determined according to the following sources: For the northern border (Komarov Botanical Institute); for the western border (Grossgheim, 1940); for the eastern border, authors used the Caspian sea coast; for the southern border, authors used the former USSR border. Two locations of species disjunctive from basic area were confirmed by herbarium specimens at Moscow State University.

Reference citations:

Grossheim, A.A. 1940. Flora of the Caucasus. Baku: Publishing House AzFAS. V. 2: 284. (In Russian)
Moscow State University, Moscow, Russia.
N.I. Vavilov All-Russian Research Institute of Plant Industry [WIR], Saint Petersburg, Russian.
N.I. Vavilov Institute, Herbarium Department, 1992. Information retrieval system: wild-growing relatives of cultural plants of Russia. STC Informregistr 0229905883, St. Petersburg, Russia.
V.L. Komarov Botanical Institute [LE], Saint Petersburg, Russia.

Right and copyright:

Copyright on this map and its description belongs to its authors.