step1、install ndk-pkg

step2、update ndk-pkg-formula-repository

ndk-pkg update

step3、build and install proj7

ndk-pkg install proj7

ndk-pkg formula view proj7

{{ formula }}

if the formula of proj7 dosn't meet your needs, you can edit it ⤵︎

ndk-pkg formula edit proj7

after editing, you may want to rebuild this package ⤵︎

ndk-pkg install proj7