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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
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
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
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
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
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
Until we get this…. from context of use as mechanical engineering becomes a more specialized and sophisticated field.


Transplantation
Transplantation from context of use as mechanical engineering becomes a more specialized and sophisticated field.

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.htm from context of use as mechanical engineering becomes a more specialized and sophisticated field.http://www.visifire.com/silverlight_radar_polar_charts_gallery.php


Codification
Codification from context of use as mechanical engineering becomes a more specialized and sophisticated field.

  • 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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