Wikipedia:WikiProject Elements/PTG/graphics

Categories

 * 1. element to cat
 * 2. cat to elements
 * 3. distinguish cat areas (border in pt)
 * 4. pleasant view


 * not
 * x1. association (x 'red=alkaline reactive')
 * x2. disrupt text (?)

Requirements, to solve

 * 9+1 colors (2018): Number of categories: 9 identified, + 1 "unknown chemical properties" i.e., category can not be established
 * ? Could it become 10+1? (it was before 2018, ie set 2013)


 * border illustration:
 * Possible diagonal mix for border elements. Colors should be distinct wrt this. (new)


 * distinct classes, not fluid: would confuse? Doubted classes (say metalloids) could be noted differently. (hatching)


 * Legend
 * Recognisability in-table &lt;--&gt; legend below connection
 * Do not use associations (not "metals associate with silvergrey"; not "alkalis burn easily so are red")
 * Do other sets (blocks, ...) are not considered simultaneously (do not appear in the same table)
 * Advise a sequence in the periods (left-to-right) OR require circular consitency (NG-AM)
 * Advise/check sequence for variant PTs (Left Step, ...)
 * Contrast check wrt background (white or near-white)


 * Future: allow mixed colors (diagonally mixed?). color requirements?


 * Fontcolors used (css-style attribute:color):
 * 1. black and wikilink-blue (local link, visited/notvisited):


 * #0645AD --bluelink
 * #0B0080 -- bluelink, visited (help)
 * #0B0080 -- bluelink, visited (help)

Fontcolors: State of Matter, wl

 * State of Matter fontcolor used:




 * IOW, black is used twice (meaning 'solid')



Recognition and distinction
"Recognition and distinction" are requirements for legend colors to check that the reader is able to recognise a set (category), to distinguish different sets, to find a map color in the legend and &mdash;reverse&mdash; find a legend color on the map.


 * The reader should be able to discern color borders (where does a category end?, where does it meet an other category?), and also recognise (group) same-color disjoint areas.


 * &#x2460; Find element-color or area-color in the legend
 * &#x2461; Identify single-color set (can be disjoint), and distinguish different sets at border.
 * &#x2462; Find the area (elements) from a color in the legend


 * When checking for color blindness accessibility, these requirements are of huge influence.
 * See also: "info not by colors alone".
 * On second thought, the #2 can be split: 2a. see a group/map area, even when disjointed; and 2b. see distinction from different map color area. -DePiep (talk) 23:17, 4 January 2021 (UTC)

Other graphic topics

 * User:DePiep/PT-toggle-zoom about zooming the PT (detail/overview)