Re: [R-sig-Geo] Lo Cape projections in sf and terra

2023-02-11 Thread dave furniss
- Original Message - From: "Edzer Pebesma" To: r-sig-geo@r-project.org Sent: Saturday, February 11, 2023 12:43:15 AM Subject: Re: [R-sig-Geo] Lo Cape projections in sf and terra I ran into this a few months ago while preparing for a workshop I gave (online) to SASA22 participants in So

Re: [R-sig-Geo] Lo Cape projections in sf and terra

2023-02-10 Thread Edzer Pebesma
I ran into this a few months ago while preparing for a workshop I gave (online) to SASA22 participants in South Africa: https://edzer.github.io/SASA22/workshop.html If you divide the geometry by -1 (or multiply it by -1) I don't think you can simply set back the CRS to the old value

[R-sig-Geo] Lo Cape projections in sf and terra

2023-02-10 Thread dave furniss
Hello all I'm struggling with a projection system used by miners in South Africa, the Lo Cape system. I've put together some commented dummy code that I hope illustrates the issues. If someone could give me some guidance on how to convert between this and other crs's, that would be much