Technologies and Map Projections of the Russian Empire, the Soviet Union, and
Maria E. Fleis (email@example.com), Michael M.
Michael V. Alexandrovich (firstname.lastname@example.org),
The respect to a country begins from
attention to its territory imaging on geographic maps. The
Map projections must be easy for
practical use. The 1957 Atlas for Selection of Map Projections was the most handy for a long time. It included formulas, tables of
rectangular coordinates and linkage between projections and geographic regions.
Nowadays computer technologies are preferred; furthermore it’s advisable to
have projection information on the Web. A list of main projections for
small-scale maps of
The most commonly used projection
for small-scale maps is the Equidistant Conic with two standart parallels (Delisle projection). It seems to be
first applied for the General map of Russian Empire (Kirilov’s map, 1734) and then for the map of
Delisle projection’s advantages noted by Euler consist in equality of latitude degrees, true proportion between longitude and latitude degrees for two specially selected standard parallels and ortogonal crossing of parallels and meridians. Straight meridians allow every map part to be copied as a separate map.
Standard parallels on Delisle projection may be different and they are usually not shown on maps. A web-application is developed and published at GRC IGRAS site (http://www.geocnt.geonet.ru) determining conic projection parameters using entered rectangular coordinates and creating projection description file for some GIS software products. This application allowed us to provide a superficial projection analysis for the maps mentioned above. It was found that their parameters differ and don’t match parameters pointed in literature. Full map projection description suitable for GIS software allowes GIS-technologies usage for comparative analysis of old and new maps. In this paper, common principles of projection setting in ArcGIS, MapInfo and GeoGraph GIS software products are defined and their realisation for Delisle projection is shown.