BENGALURU: Hoping to augment its tax collection, the Bruhat Bengaluru Mahanagara (Palike) will conduct a drone survey of properties in the city. BBMP commissioner N Manjunatha Prasad has written to the police chief to deploy drones in five wards on a pilot basis.The Palike is planning to cover an area of 10sqkm in the survey. “We intend to use geospatial data for assessment of buildings, facades and property taxes. We will seek permission to use UAVs for mapping with flights under the legal height of 120 metres,” Prasad wrote to the police commissioner. The survey, to be carried out by DronaMaps Private Ltd, will create 3D datasets, 2D orthomosaics and identify features like building footprints and roads, among other things. According to Prasad, other outputs from the exercise would be used in planning and execution of BBMP’s development plans. Some 25-30 flying days would be needed to cover the area. The outcome will help BBMP have a 3D city map. “As a pilot project, we have chosen five wards because of variation in terms of nature and density of properties,” BBMP officials said. The officials said the survey would help them capture pictures from the ground and make it easy to identify deviations in property tax assessment. The BBMP chief has sought Isro’s technical support for the survey. In a letter to the space agency, Prasad sought its involvement in an advisory role.