what do you mean with "reference"?

[Magallo]

What is the first paramater called 'reference'? What is it used for? Could you possibly explain that please?

[chrberger]

This input is the origin and used as outlined below:Convert a given WGS84 position to a Cartesian position using a given WGS84 reference position with Mercator projection: std::array<double, 2> cartesianPosition = wgs84::toCartesian({52.247041, 10.575830} /* reference position */, {52.248091, 10.57417} /* position to be converted */));On 26 Jun 2023, at 09:58, Magallo ***@***.***> wrote: What is the first paramater called 'reference'? What is it used for? Could you possibly explain that please? —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Magallo]

I continue not to understand. What an origin is used for? I expected only one coordinate in WGS84 as input and a coordinte in cartesian as output.