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Lengths and Angles

Convert between different angle and length units and perform longitude wrapping; convert units of distances along the surface of the Earth

On a perfect sphere, the distance between points on the surface of the sphere can be represented by angles. For spherical models of the Earth, Moon, and other planetary bodies, Mapping Toolbox™ allows spherical distance conversion between common units of angles and length.

Functions

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Angle Conversion

Convert Degrees and Radians

`deg2rad`	Convert angle from degrees to radians
`rad2deg`	Convert angle from radians to degrees

Convert Notations

`degrees2dm`	Convert degrees to degrees-minutes
`degrees2dms`	Convert degrees to degrees-minutes-seconds
`dm2degrees`	Convert degrees-minutes to degrees
`dms2degrees`	Convert degrees-minutes-seconds to degrees

Convert Degrees and Radians at Run-Time

`toDegrees`	Convert angles to degrees
`toRadians`	Convert angles to radians
`fromDegrees`	Convert angles from degrees
`fromRadians`	Convert angles from radians

Angle Wrapping

`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]
`unwrapMultipart`	Unwrap angles with parts separated by `NaN` values

Length Conversion

`km2nm`	Convert kilometers to nautical miles
`km2sm`	Convert kilometers to statute miles
`nm2km`	Convert nautical miles to kilometers
`nm2sm`	Convert nautical to statute miles
`sm2km`	Convert statute miles to kilometers
`sm2nm`	Convert statute to nautical miles

Spherical Distance Conversion Between Angles and Length

`deg2km`	Convert spherical distance from degrees to kilometers
`deg2nm`	Convert spherical distance from degrees to nautical miles
`deg2sm`	Convert spherical distance from degrees to statute miles
`km2deg`	Convert spherical distance from kilometers to degrees
`km2rad`	Convert spherical distance from kilometers to radians
`nm2deg`	Convert spherical distance from nautical miles to degrees
`nm2rad`	Convert spherical distance from nautical miles to radians
`rad2km`	Convert spherical distance from radians to kilometers
`rad2nm`	Convert spherical distance from radians to nautical miles
`rad2sm`	Convert spherical distance from radians to statute miles
`sm2deg`	Convert spherical distance from statute miles to degrees
`sm2rad`	Convert spherical distance from statute miles to radians

Formatted Angles, Unit Validation, Unit Conversion Factors

`str2angle`	Convert strings to angles in degrees
`angl2str`	Convert angles to character array
`map.geodesy.isDegree`	True if input matches `'degree'` and false if `'radian'`
`validateLengthUnit`	Validate and standardize length unit
`unitsratio`	Conversion factor between units

Topics

Angle Representations and Angular Units
Use angles with Mapping Toolbox functions, convert between angle representations, and format angles as text.
Length and Distance Units
Linear measurements of arc lengths and distances on spheroids use the same units as on the plane, such as feet, meters, miles, and kilometers.
Distances on the Sphere
You can represent distances on the sphere using angles or linear arc lengths.