Chicago Chief Data Officer Nick Lucius (right) followed up on recommendations from Interim Inspector General William Marback (left) to clean up and centralize the city’s information technology systems. [Twitter/Inspector General’s office]

Chicago leaders embarked last month on an “aggressive 12-month plan” to modernize and centralize the city’s repository of data on everything from ambulance response times to overgrown weeds, according to the city’s data chief.