size by column sum
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Aandrewxhill
Last edited Jun 2, 2014
Created on Jun 2, 2014
This visualization shows the cumulative sum of a numerical attribute over time, with point markers growing in size as their aggregated value exceeds thresholds of 10 and 100. The map uses CartoCSS and Torque’s frame-based animation to render 128 time steps, applying a sum aggregation function to the `whatever_column`. Marker width scales from 4 to 14 pixels, and trailing frames become larger and more transparent, creating a motion trail effect. The data comes from a gist by andrewxhill, with styling defined directly in the `cartocss.css` file.
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