The FAA plans to begin publishing airport grid maps on April 27. The new maps break an airport down into one-mile squares that each contain the maximum altitude a drone may expect to be safely flown at when near an airport. Altitudes that exceed those depicted on the maps will require additional safety analysis and coordination to determine if an application can be approved, the agency said. The new grid maps are expected to help drone operators improve the quality of their Part 107 airspace authorization requests. Improving those requests should help the FAA process applications more quickly.