install mod_semantic_map

edit

It looks like mod_semantic_map isn't indexed properly on ros.org, but if you browse software on ros.org and go to its details page, you'll find that source is available here and a tutorial is available here.

EDIT: You should have a look at the environment variables wiki page to understand what's happening with the failure of rosmake.

rosmake uses the variable ROS_PACKAGE_PATH when looking for ROS packages to compile. If you create or download a new package and its directory isn't on the path, rosmake won't work.

To see what the path currently is, type 'echo $ROS_PACKAGE_PATH'

If the directory in which you put mod_semantic_map isn't on that path, then you know that's the problem.

To add a directory to the path, type 'export ROS_PACKAGE_PATH=/the/directory/to/add:$ROS_PACKAGE_PATH'

You may also want to put this line in your ~/.bashrc file so it will happen automatically at login.