Bog'liq Judith A. Tyner. Principles of map design. New York. „The Guilford Press”, 2010
fIgURe 6.21. The Gall–Peters projection was proposed as a replacement for the Mercator,
but has the same disadvantages of any cylindrical projection.
The earth’s graticule and Projections 111
American Cartographic Association passed a resolution strongly urging publishers,
governmental agencies, and the media to cease using rectangular world maps for
general purposes and artistic displays, which was signed by other cartographic and
geographic organizations (American Cartographic Committee on Map Projections,
1989, p. 223). Despite this effort, rectangular maps are still found in children’s geog-
raphy workbooks.
Other aspects of Cylindrical Projections
If it is possible to wrap a cylinder around the equator, it is equally possible to create
a cylindrical projection by wrapping the cylinder around some other great circle. If
the great circle is formed by a pair of opposing meridians, the resulting projection
is a transverse aspect. For any other great circle, the projection is an oblique aspect.
The parallels and meridians look very different in these aspects from the normal or
equatorial aspect, and some properties are lost. For example, rhumb lines are straight
lines only on the equatorial aspect of the Mercator, not on the transverse or oblique
aspects. The zone of best representation is along the tangent great circle in any of
these cases (Figure 6.22).
It is also possible to create a cylindrical projection that has two zones of good
representation, called a secant case. This is accomplished with a secant cylinder, that
EQUATORIAL
TRANSVERSE
OBLIQUE
NORMAL
EQUATORIAL
OBLIQUE
N P
POLAR
EQUATORIAL
OBLIQUE
fIgURe 6.22. Projection aspects.
112 THe geOgRaPHiC anD CaRTOgRaPHiC FRaMeWORK
is, a cylinder that cuts the globe instead of encircling it. The small circles where the
cylinder enters and exits the generating globe has true representations.
