[OSRS-PROJ] Unknown USSR projection
gerald.evenden at verizon.net
Mon Mar 8 11:38:42 EST 2004
Looking at it with dividers and a ruler it looks to be a conic and
of parallels eliminates equidistant. The parallels are at 10 degree
but the longitude appears to be at 10 degree intervals as well but I
odd discrepancies when comparing locations of the inland seas and
arctic islands with an old Goode atlas. Soviet disinformation, maybe??
From what can be seen from the spacing of the parallels I would guess
conformal so try Lambert Conformal Conic (lcc) as a first guess with
tangential latitude near the center. Scaling will be trial and error.
PS: a lot of Soviet map projections are covered by Maling in "A Review
of Some Russian Map Projection" in addition to the aforementioned Snyder
> I wondered if anybody can help me identify a projection. I need to
> digitize some range maps from a book on the birds of the USSR: all the
> maps share the same basemap but the book itself contains no projection
> details. The image is on the web:
> The only latitude or longitude mark on the map is the arctic circle:
> as far as I can make out this is an arc from a circle, although there
> is a hint that at the edges of the map the arc may turn down away from
> the circle. I've tried identifying 10 degree lines of latitude and
> longitude from locations around the map edge and that suggests to me
> that the map is projected on something like a equidistant conic or
> albers projection. What I've got so far:
> * the central meridian is around 105 E.
> * the longitude lines look like they converge on the centre of the
> circle, although if I try and draw them in from geography, they don't
> converge very well.
> * a degree of longitude is about 0.4 degrees of arc on the projected
> * the latitude lines don't seem to be equally spaced - in particular,
> the 80-70 N gap is wider than the other three latitudinal spacings.
> I can't get it to fit - has anyone got any suggestions for projections
> or projection parameters? It doesn't help that I suspect the map is
> rather inaccurately drawn.
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Jerry and the low riders: Daisy Mae and Joshua
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