Evidence

Collaborative heat maps

Websites like mapperoni and uMap let you create maps with layers in a minute, embed them in your site or share them with others to contribute. An example: The urban design office prostorož invited citizens of Ljubljana in 2020 to vote for locations they experience as hot. In three weeks, they cast around 700 votes. The data was consistent with the locations of heat islands measured by satellite thermal imaging. The responses showed that people change routes and habits in the summer or avoid certain locations in the city altogether due to the heat. Respondents also suggested their own cooling measures - they want more and bigger trees, less asphalt, less concrete, and less parking spaces. This map was then published in newspapers and reached a big audience.