MATLAB MAPPING TOOLBOX RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 117)

16-5

Interpretation of “Miles” Units has Changed

As of R2007b, the following functions interpret distance units specified as 'miles' as

International Miles, not Statute Miles:

• almanac

• daspectm

• elevation

• mapprofile

• paperscale

• scaleruler

Compatibility Considerations

This will not materially affect the accuracy of results in most cases; the lengths of the two

types of miles only differ by about two parts per million (three millimeters). The distdim

function's interpretation of miles has not changed. However, there are better alternatives

to it; see the release note “Alternatives to the distdim Function” on page 16-4.

New Angle Wrapping Functions

Four new low-level functions have been added that force longitudes, azimuths, or phase

angles to span intervals of [0 360] or [-180 180] degrees or [0 2*pi] or [-pi pi]

radians.

• wrapTo180 — Wrap angle in degrees to [-180 180]

• wrapTo360 — Wrap angle in degrees to [0 360]

• wrapToPi — Wrap angle in radians to [-pi pi]

• wrapTo2Pi — Wrap angle in radians to [0 2*pi]

The first two functions work in degrees, the next two in radians. None of them perform

argument checking.

You can use the new wrapping and functions in place of npi2pi and zero22pi for

greater efficiency. The older functions will eventually be removed from the toolbox.

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MATLAB MAPPING TOOLBOX RELEASE NOTES Guide de l'utilisateur Page 117