Hi I would like to know if it is possible to use my select menu to dynamically change the map on the page to show for example here on this page http://www.mru-instruments.com/my-form/ when the page loads all the locations of our company are listed but when the user selects a new location via the select menu we want the map to change or highlight the selected location.
No this is not possible, You have to create a category of country name and assign the locations to the category.Then go to listings settings and enable categories filter. This is the procedure to filter the locations and make map dynamically.
Happy New Year 2018,
Sorry for the delay, I was on leave so I couldn't reply you. Map Id will create automatically when you create every new map and you will see in a shortcode Form like [put_wpgm id=1] at manage maps. You need to copy the shortcode and paste it to any page where you want to display a map.