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Overlap Maps is a free service that can be used to quickly compare the size of countries, states, provinces, and some bodies of water. To create a visual comparison of two countries select one country from the "overlap this" menu and select one country from the "onto this" menu. The comparisons you make are displayed on a map. You can make comparisons from different categories.

This is a browser-based tool with versatile features that combine photographs, videos, and blogging on interactive Google Maps and Google Earth. The tool features a chronological timeline that can be used for elaborate representation of school activities, presentations, and projects.