Fun with Torque

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Fun with Torque

✓ Published0🌍 Public

Last edited Dec 11, 2014

Created on Dec 10, 2014

Torque maps animate Denver traffic accident data using CartoDB’s Torque library, which renders time-series point data as animated markers over a base map. The visualization cycles through 512 frames, with each frame aggregating accident counts per geotemporal bin via SQL aggregation functions like `count(cartodb_id)` or `CDB_Math_Mode(district_i)`. Marker size and opacity vary with frame offset to create motion trails, while categorical coloring uses CSS-like `[value=...]` selectors to distinguish districts. The example demonstrates multiple Torque configurations—category, bubble, discrete continuous, and static “Torque-Zero” modes—all driven by CartoCSS properties such as `-torque-frame-count`, `-torque-resolution`, and `-torque-aggregation-function`.

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