proj from home:worldcitizen:SLES_Backports project
Select Your Operating System
Add repository and install manually
For SLE 15 SP3 Backports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:worldcitizen:SLES_Backports/SLE_15_SP3_Backports/home:worldcitizen:SLES_Backports.repo zypper refresh zypper install proj