Map Projections

Map Projections for Web Mapping

5607.1 - Selecting map projections for world maps

Wednesday, July 5
2:50 PM - 3:10 PM
Location: Maryland B

Selecting map projections is challenging for many cartographers. John P. Snyder published a hierarchical decision tree in 1987, which is a systematic selection guideline for projections at all scales. Projection Wizard is an online projection selection tool available at It is based on a modified version of Snyder’s guideline. For world maps, Projection Wizard and Snyder’s guideline both suggest a list of different map projections instead of a single “best” projection, because no hard rules for selecting world map projections exist. There has never been an agreement among cartographers on a best choice for world map projections, because personal taste, aesthetic preferences and layout constraints are relevant selection criteria. This presentation discusses additional selection criteria for selecting projections for world maps.

Bojan Šavrič

Software Development Engineer
Environmental Systems Research Institute

Bojan Šavrič is a Software Development Engineer for Projection Engine team at Esri, Inc. He holds a Ph.D. in geography and Diploma degree in geodetic engineering. His main research interests are map projections, mathematical techniques in cartography, and the development of tools for cartographers. Bojan is also a member of the International Cartographic Association Commission on Map Projections.


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Bernhard Jenny

Associate Professor
Monash University



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Tom H. Patterson

US National Park Service

Tom Patterson received an M.A. in geography from the University of Hawaii at Manoa in 1982. He now is employed as a cartographer for the U.S. National Park Service, Harpers Ferry Center designing maps for publications, animations, mobile applications, and indoor and outdoor exhibits. Tom is a former president of the North American Cartographic Information Society (NACIS) and is active in the ICA Commission on Mountain Cartography. He lives outside of Washington, D.C. in northern Virginia.


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Sarah E. Battersby

Senior Research Scientist
Tableau Research

Sarah Battersby is a Senior Research Scientist at Tableau Software. She is a past president of the Cartography and Geographic Information Society (CaGIS) and is a member of the ICA Commission on Map Projections. Sarah's primary area of focus is cognitive cartography. Her work emphasizes how we can help people visualize and use spatial information more effectively. Her research has covered a variety of areas, including perception in dynamic map displays, geospatial technologies and spatial thinking abilities, and the impact of map projection on spatial cognition.


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5607.1 - Selecting map projections for world maps


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