The themes in WordPress are formed by different template files. The templates used depend of the website's sections ( more information about the templates hierarchy in the following link: http://codex.wordpress.org/Template_Hierarchy )
If you want to display the Post Map in the homepage, for example, you must insert the map code in the home.php file (or index.php file in its absence).
Selected the template where the map will be set, open the corresponding file in the text editor of your choice and paste the following code to display the map:
<? php echo do_shortcode ('[post-map CodePeople]');?>
Note: The previous code should be pasted in the position where the map be displayed.