$ sudo apt-get update
$ sudo apt-get install libosgearthannotation2 

libosgearthannotation2 is installed in your system.

Make ensure the libosgearthannotation2 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libosgearthannotation2 *

You will get with libosgearthannotation2 package name, version, architecture and description in a table

libosgearthannotation2 package basic information: