Class

NSUnitArea

A unit of measure for area.

Declaration

@interface NSUnitArea : NSDimension

Overview

You typically use instances of NSUnitArea to represent specific quantities of area using the NSMeasurement class.

Area

Area is a quantity of extent in two dimensions. Area can be expressed by SI derived units in terms of square meters (m2). Area is also commonly measured in square feet (ft2) and acres (ac).

The NSUnitArea class defines its base unit as squareMeters, and provides the following units, which are initialized using NSUnitConverterLinear converters with the specified coefficients:

Name

Method

Symbol

Coefficient

Square Megameters

squareMegameters

Mm²

1e12

Square Kilometers

squareKilometers

km²

1000000.0

Square Meters

squareMeters

1.0

Square Centimeter

squareCentimeters

cm²

0.0001

Square Millimeters

squareMillimeters

mm²

0.000001

Square Micrometers

squareMicrometers

µm²

1e-12

Square Nanometers

squareNanometers

nm²

1e-18

Square Inches

squareInches

in²

0.00064516

Square Feet

squareFeet

ft²

0.092903

Square Yards

squareYards

yd²

0.836127

Square Miles

squareMiles

mi²

2.59e+6

Acres

acres

ac

4046.86

Ares

ares

a

100

Hectares

hectares

ha

10000

Topics

Accessing the Base Unit

+ baseUnit

Returns the base unit of area. Equal to squareMeters.

Accessing Predefined Units

squareMegameters

Returns the square megameters unit of area.

squareKilometers

Returns the square kilometers unit of area.

squareMeters

Returns the square meters unit of area.

squareCentimeters

Returns the square centimeters unit of area.

squareMillimeters

Returns the square millimeters unit of area.

squareMicrometers

Returns the square micrometers unit of area.

squareNanometers

Returns the square nanometers unit of area.

squareInches

Returns the square inches unit of area.

squareFeet

Returns the square feet unit of area.

squareYards

Returns the square yards unit of area.

squareMiles

Returns the square miles unit of area.

acres

Returns the acres unit of area.

ares

Returns the ares unit of area.

hectares

Returns the hectar unit of area.

Relationships

Inherits From

Conforms To

See Also

Physical Dimension

NSUnitLength

A unit of measure for length.

NSUnitVolume

A unit of measure for volume.

NSUnitAngle

A unit of measure for rotation.