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Interesting Tool of the Week: Quadrigam – Connecting two visualizers
Aug 18th, 2015 by Tom Johnson

Take me to Quadrigam

Connect two visualizers

All of the charts have input data and output data. You can synchronize two charts just using the output data element of the first chart as the input data element of the second chart. You can even build formulas based on data outputs, like for instance using the element selected in a control list to be part of a formula which filters a given datasset based on one column which elements match with the selected element in the control list. Charts use to have two main data outputs:

  • On over: When on over with the mouse, the element will be the data output of that chart.
  • Selection: When clicking on a given element of a chart (e.g: a serie in a Line chart) that will be the output element that can be synchronize with another chart. In Maps, we also have “zoom” and “center” which make super easy to syncrhonize, for instance, two maps (the zoom and center of the first map act as input data elements of the second map).
Tracking campaign contributions with MapLight
Jun 19th, 2014 by Tom Johnson

Maplight, a 501(c)(3) foundation, recently announced its “extensive mapping project examining the geographic origin of contributions to legislators by state; contributions from companies to legislators by state; and roll call votes by state and district on key bills in Congress.”

Today’s news peg points to “Who in Your State Has Contributed Money to Majority Leader Candidate Kevin McCarthy (R-CA)?”

MapLight looks to be a good edition to our GIS toolbox.

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