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1. Euratlas Historical Vector Data | Duke University Libraries

   https://library.duke.edu/data/sources/euratlas

   These layers use the World Mercator projection (meters).   Archive of All Shapefiles by Century Each of the links will lead to (...)

2. Euratlas Georeferenced Vector Data doc

   https://library.duke.edu/sites/default/files/datavis/users/markt%40duke.edu/Euratlas_data_description.pdf

   . • id: unique ID • level: indicate if the uncertain border concerns states borders (0), 1st level division borders (1) or 2nd level division (...)

3. Types of Maps · Mapping the City: A Stranger's Guide · Duke University Library Exhibits

   https://exhibits.library.duke.edu/exhibits/show/mappingthecity/maptypes

   Gerardus Mercator, a Flemish cartographer and mathematician, created what is now known as the Mercator projection in 1569.

4. Dates, Measures, Names - Islamic History/Historiography - تاريخ - LibGuides at Duke University

   https://guides.library.duke.edu/c.php?g=289784&p=1931248

   The Qiblas of the Sahaba -- Mecca and the Mercator projection -- The shortest distance -- A tunnel through the earth -- (...)

5. Maps in Tableau - Duke Libraries Center for Data and Visualization Sciences

   https://blogs.library.duke.edu/data/2020/03/06/maps-in-tableau/

   Tableau uses the “Web Mercator” projection: This is the same as Google Earth/Maps.

6. Select Bibliography: ME Cartography - Middle East Maps & Atlases - LibGuides at Duke University

   https://guides.library.duke.edu/c.php?g=289804&p=1931325

   The Qiblas of the Sahaba -- Mecca and the Mercator projection -- The shortest distance -- A tunnel through the earth -- (...)

7. Islamic Studies - Middle East & Islamic Studies - LibGuides at Duke University

   https://guides.library.duke.edu/c.php?g=289286&p=1929254

   The Qiblas of the Sahaba -- Mecca and the Mercator projection -- The shortest distance -- A tunnel through the earth -- (...)

8. Projections / CRS - R: Mapping and Geospatial - LibGuides at Duke University

   https://guides.library.duke.edu/r-geospatial/CRS

   A Few Useful EPSG Codes ​Use as the projection argument of tmaptools::set_projection() CRS Projection Datum Units EPSG (...)

9. Duke Libraries Center for Data and Visualization Sciences - Page 3 of 12 -

   https://blogs.library.duke.edu/data/page/3/

   Tableau uses the “Web Mercator” projection: This is the same as Google Earth/Maps.