# Miller Cylindrical Projection

## Classification

Cylindrical

## Graticule

Meridians: Equally spaced straight parallel lines 0.73 as long
as the Equator.

Parallels: Unequally spaced straight parallel lines, perpendicular
to the meridians. Spacing increases toward the poles, less rapidly
than that of the Mercator projection.

Poles: Straight lines equal in length to the Equator.

Symmetry: About any meridian or the Equator.

## Features

This is a projection with parallel spacing calculated to maintain
a look similar to the Mercator projection while reducing the distortion
near the poles and allowing the poles to be displayed. It is not equal-area,
equidistant, conformal, or perspective. Scale is true along the Equator
and constant between two parallels equidistant from the Equator. There
is no distortion near the Equator, and it increases moderately away
from the Equator, but it becomes severe at the poles.

The Miller Cylindrical projection is derived from the Mercator
projection; parallels are spaced from the Equator by calculating the
distance on the Mercator for a parallel at 80% of the true latitude
and dividing the result by 0.8. The result is that the two projections
are almost identical near the Equator.

## Parallels

For cylindrical projections, only one standard parallel is specified.
The other standard parallel is the same latitude with the opposite
sign. For this projection, the standard parallel is by definition
fixed at 0º.

## Remarks

This projection was presented by Osborn Maitland Miller of the
American Geographical Society in 1942. It is often used in place of
the Mercator projection for atlas maps of the world, for which it
is somewhat more appropriate.

## Limitations

This projection is available only for the sphere.

## Example

landareas = shaperead('landareas.shp','UseGeoCoords',true);
axesm ('miller', 'Frame', 'on', 'Grid', 'on');
geoshow(landareas,'FaceColor',[1 1 .5],'EdgeColor',[.6 .6 .6]);
tissot;