# Maps
The **Maps** tab allows you to **generate and upload maps prior to your operations** with the Micro VPS. This is also where you can **set your home/takeoff position and switch between generated maps.**
Maps Tab
## Why do I need this?
Theseus Micro VPS **requires pre-processed satellite imagery** to perform map matching. Micro VPS can store up to 50,000 sq. km of map area for any mission (e.g. 20 km x 2500 km area). The Maps tab allows you to generate and download these maps before your mission.
To learn more about Micro VPS and our map matching technology visit the [Technology page on Theseus' website](https://www.theseus.us/technology).
## Maps Information
Map file sizes are \~5-6MB per km2. A 20,000 km2 would be around 100GB. The amount of time it takes to download a map depends on your internet speed. Large maps take a long time to generate and download, so please be sure to do this well in advance of your flights.
Maps are generated with a buffer area around them, so the exact size of the map and number of tiles generated will always be more than the selected area. The percentage of the total map that is the buffer area depends on the size and shape of the map.
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