Geometry Boost List: Re: [geometry] Strange values using boost geometry gis extension with tmerc projection

Subject: Re: [geometry] Strange values using boost geometry gis extension with tmerc projection
From: Barend Gehrels (barend_at_[hidden])
Date: 2015-04-26 17:20:26

Hi Andrew,

Andrew Hundt schreef op 26-4-2015 om 23:08:
>
> I'm getting what I believe to be strange behavior with lat/lon to x/y 
> for tmerc. If I understand correctly, I can pass a lat/lon in degrees 
> in and get an x/y in meters out. However, when I pass in 0,0 m and 
> then 1,1 m into inv() it appears to jump by 1.57 degrees latitude, 
> which I believe is thousands of meters rather than just 1. Am I using 
> it incorrectly or is this an issue?
>
> Details are below. Thanks!

I'm by chance currently busy with the projections so will look tomorrow.

Regards, Barend