Commission Workshops

Map Projections

1. Critical Review on Using Developable Surfaces in Map Projections Theory2. Standardization in Map Projections

Sunday, July 2
8:00 AM - 10:00 AM

Critical Review on Using Developable Surfaces in Map Projections Theory

It is common practice to use developable surfaces in the interpretation of map projections. The author takes a critical approach to this and strongly suggest a more diverse approach. Mapping onto a developable surface has a limited domain of application and the approach can lead to incorrect conclusions about map projecton distortion.

Many textbook authors are aware of the fact that developable surfaces are not used to create projections today, but still insist on using developable surfaces as conceptual aids that help to illustrate the projection process. Yet there are different ways of illustrating the process, and possibilities which are applicable to all map projections, not only to some of them. These methods are presented, and are useful to students for thinking and understanding map projections.

The ICA Commission on Map Projections is preparing a proposal for standardization of symbols in map projections for the ICC2017 to be held in Washington, D.C.

Standardization in Map Projections

Standardization is the process of implementing and developing technical standards based on the consensus of different parties. Standardization can help maximize compatibility, interoperability, safety, repeatability and quality. Standardization may be due to regulation or it may involve the formal consensus of technical experts.

A technical standard is an established norm or requirement in regard to technical systems. It is usually a formal document which establishes uniform engineering or technical criteria, methods, processes and practices. A technical standard may be developed privately or unilaterally, for example by a corporation, regulatory body, military, etc. Standards can also be developed by groups such as committees or associations.

According to the Charter of the ICA Commission on Map Projections, activities of the Commission include recommending canonical names for map projections and recommending map projection terminology and taxonomies. In addition, we would like to standardize symbology in map projections.

The ICA Commission on Map Projections is going to prepare a proposal for standardization of symbols in map projections for the ICC2017 to be held in Washington, D.C.


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1. Critical Review on Using Developable Surfaces in Map Projections Theory2. Standardization in Map Projections



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