Tilikum Crossing changes colors to reflect the conditions of the Willamette River. USGS and NOAA monitors near the Morrison bridge translate data into light using a program developed by digital artist Morgan Barnard. Water temperature controls colors, and river speed determines how fast the colors cycle through. Light moves toward the center when the tide comes in, and toward then ends as the tide goes out, moving faster closer to high and low tides and slower at the midpoints. River height determines contrast; higher water results in higher contrast.
Photograph was taken in Portland, Oregon, USA.
Image is 4672 × 3104 pixels.
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