![]() ![]() While Chicago has asserted that the dye being used is safe, some feel that there are other concerns that may arise from turning the river green. "Dyeing the river perpetuates the notion that it can be treated any way anyone wants, rather than protected as a valuable natural resource," Margaret Frisbie, head of advocacy group Friends of the Chicago River, tells EuroNews. Dyeing the river green is ecologically irresponsible Groups have also been speaking out about the potential message that dyeing the river could be sending about the river's ecosystem. While the city has consistently maintained that the dye is completely safe for the environment, some activists are not so sure. ![]() However, the practice of dyeing the river, which began in 1962, has not been without controversy. Patrick's Day Parade in 2023 - the largest gathering outside of Dublin. Chicago's Irish heritage often looms large during the holiday, with Block Club Chicagoreporting that an estimated 75,000 people attended the city's annual St. When you move to an area in the distance, the 3D model determines the best panorama to show you for that location.The event is a cultural milestone in the city of Chicago, with thousands lining the river every year to catch a glimpse of the green hues in action. How quickly the car’s three lasers reflect off surfaces tells us how far a building or object is, and enables us to construct 3D models. We then apply special image processing algorithms to lessen ‘seams’ and create smooth transitions. To avoid gaps in the 360 photos, adjacent cameras take slightly overlapping pictures, and then we ‘stitch’ the photos together into a single 360 degree image. This helps us reconstruct the car’s exact route, and even tilt and realign images as needed. To match each image to its geographic location on the map, we combine signals from sensors on the car that measure GPS, speed and direction. ![]() We pay close attention to many factors, including the weather and the population density of various areas, to determine when and where we can collect the best possible imagery. First off we need to actually drive around and photograph the locations to show in Street View. ![]()
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