You had planned a drink in the sun, you had checked the weather forecast, but here you are, shivering in this light shirt: the terrace is in the shade.
It is with a scenario like this that Jean-Charles Levenne has the idea of JveuxDuSoleil.
“I said to myself that there should be a way to cross-reference building height data with the position of the sun,” he says.
Jean-Charles already had the ambition to create a site, and this concept represents a great opportunity to get started.
The process is, according to the creator of JveuxDuSoleil, very simple.
Thanks to OpenStreetMap, “a collaborative alternative to Google Maps”, Jean-Charles has access to public data such as the position of trees, the names of streets, the height of buildings.
“I collect this data, and I cross-reference it with an algorithm that calculates the position of the sun every day of the year”, and that's the job!
It is then enough to list the terraces of the city.
JveuxDuSoleil everywhere, and for free
“Thanks to cadastres, it can theoretically work anywhere in the world,” says Jean-Charles.
After three test cities – Nantes, Marseille and Paris – he decided to extend the concept to other cities in France and Europe.
"When I get a request and I don't have OpenStreetMap data, I can look on Google Street View, and calculate the shadow with a little less precision," he says.
This method can allow him to continue to expand JveuxDuSoleil.
Enlargement, yes, but at what cost?
None, assures Jean-Charles, “on the contrary, it costs me money to host the site.
“Even if his application has met with some success, he certifies that he has “no lucrative ambition for the moment.
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