A device can receive obstacle data from a plurality of sources. The obstacle data can include location data associated with obstacles. The device can determine weightings for the obstacles based on the plurality of sources. Each of the weightings can indicate a measure of reliability/accuracy of the information regarding an obstacle. The device can process the obstacle data to associate the obstacles with airspace voxel(s), that represent one or more 3D portions of airspace, based on the location data, receive flight parameters relating to a proposed flight plan of a UAV through airspace represented by a set of airspace voxels, determine whether the set of airspace voxels includes any of the airspace voxel(s), and perform one or more actions to cause a recommendation, regarding the proposed flight plan and based on the determination, to be provided. The recommendation can be based on one or more of the weightings.