Because the graphic content of old charts is now in the public domain, users are welcome to download and use most of the images provided. Whenever possible, links to the entries and high-resolution digital copies made available by some museums and libraries are likewise offered.

The information contained in the database is presented in two forms:

1. as searchable and sortable lists (of charts, atlases, authors and archives);
2. and as individual records, where all the information for a specific entity is shown.

One of the system’s unique and powerful features is the capacity to store and display the geographical coverage of charts and atlases, using Google Maps for visualization. Under the title Geo Search, on the left bar, an intuitive and easy-to-use tool is provided to make geographical searches on the database and apply various filters to the results. This permits, for example, the identification of all charts of a certain period that were produced in a certain country and depict a specific region indicated by the user.

We welcome users to suggest corrections to the information stored in the database and improvements to its tools, as well as to contact the MEDEA-CHART team to discuss any research relevant to the study of old charts.