Imprecity (from the English impression of city - impression of the city),  - informational  environment for collecting data on the subjective perception of the city: users - citizens and tourists - leave on platform deliberately emoticons and stories about places. The “thin data” collected  is integrated into a full-fledged interaction algorithm between experts and decision makers at the urban planning level. Imprecity - was created as one of the projects within the framework of the integrated project "Smart City of St. Petersburg". Over the two years of the platform's operation, we have received a unique set of depersonalized data for analysis and machine learning.