# FAQs

## Why does the mission type keep changing when we upload our KMZ/KML file?

FlightPlanner will set the mission type to Corridor mode if you upload a *polyline* KMZ and will default to Mapping Mode if you upload a *polygon* KMZ.&#x20;

## What is Corridor Mode and how does it differ from Mapping Mode?

Corridor mode allows you to plan a flight for a long and narrow area of interest such as a highway or railroad. It differs from the original Mapping Mode as you do not outline a polygon when using the planner. Instead, you select points along the corridor in a line and then adjust the corridor width accordingly to cover the desired area of interest. Refer to [Corridor Mode](https://docs.phoenixlidar.com/flightplanner/workflow/settings) for more information.&#x20;