Origins
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Origins. Conventions presume a chain of rhetorical acts that must begin somewhere, but often hard to pinpoint where. We can locate moments where conventions are beginning to take shape. T.

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Origins

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Origins

  • Conventions presume a chain of rhetorical acts that must begin somewhere, but often hard to pinpoint where


We can locate moments where conventionsare beginning to take shape


T

Plot’s chart shows key features of present-day line or scatter charts, even though meteorology has developed its own modern visual conventions

How we read barometric pressure now

.


Visual conventions change as rhetorical purposes and production technologies evolve

  • Rockefeller Foundation Annual Report 1929, 1957, 1985, 2009

  • Computer interfaces through the decades


New disciplines need new conventions

  • Depending on the type of knowledge that requires visual representation, a discipline might invent new conventions or appropriate existing conventions from another field.

  • As disciplines mature, conventions are likely to become more abstract, more specialized and more firmly and formally codified

  • Conventions unfold in 3 modes – adaptation, transplantation, codification


Adaptation

  • Mechanical engineering (drafting) starts with conventions from architecture


Representations of objects become more abstract and isolated from context of use as mechanical engineering becomes a more specialized and sophisticated field.


Until we get this….


Transplantation

Conventions branch off from other conventions in brand new directions

http://www.epa.gov/ttn/naaqs/ozone/areas/wind.htm

http://www.visifire.com/silverlight_radar_polar_charts_gallery.php


http://www.epa.gov/ttn/naaqs/ozone/areas/wind.htmhttp://www.visifire.com/silverlight_radar_polar_charts_gallery.php


Codification

  • Informal and indirect – imitation

  • Formal and direct

    • NISO: Information on Spines

    • AIA: Architectural Graphic Standards

    • IEEE: Visual Identity Standards

    • New Jersey DOP: Geologic Rock Symbols


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