Using Predefined Unit Converters

Options > Maps > Map Projections > Unit Converters > Using Predefined Unit Converters

The library contains a list of predefined unit converters. A predefined unit converter is referenced by its name. To access a predefined unit converter, use the static function GetRegisteredConverter of the class IlvUnitConverter.

The following example instantiates a Mercator projection and converts its output to international nautical miles.

IlvUnitConverter* converter =

IlvUnitConverter::GetRegisteredConverter("kmi");

IlvMercatorProjection projection;

projection.setUnitConverter(*converter);

List of Predefined Unit Converters

The table below contains a list of the predefined unit converters supplied with the Views Maps projection library.

Name	Comment	ToMeters
km	Kilometer	1000.0
m	Meter	1.0
dm	Decimeter	0.1
cm	Centimeter	0.01
mm	Millimeter	0.001
kmi	International Nautical Mile	1852.0
in	International Inch	0.0254
ft	International Foot	0.3048
yd	International Yard	0.9144
mi	International Statute Mile	1609.344
fath	International Fathom	1.8288
ch	International Chain	20.1168
link	International Link	0.201168
us-in	U.S. Surveyor’s Inch	0.025400050800101603
us-ft	U.S. Surveyor’s Foot	0.304800609601219
us-yd	U.S. Surveyor’s Yard	0.914401828803658
us-ch	U.S. Surveyor’s Chain	20.11684023368047
us-mi	U.S. Surveyor’s Statute Mile	1609.347218694437
ind-yd	Indian Yard	0.91439523
ind-ft	Indian Foot	0.30479841
ind-ch	Indian Chain	20.11669506

Published date: 05/24/2022

Last modified date: 02/24/2022