The need for an RTK (Real-Time Kinematic) system on your drone for mapping depends on the level of accuracy that you require in your mapping data. RTK technology enables more precise positioning of the drone, which can result in highly accurate data for mapping applications.

For example, if you are working on a project that requires very high accuracy, such as surveying or construction site mapping, then an RTK-enabled drone may be necessary to achieve the level of precision required. RTK technology can provide centimeter-level accuracy, which is significantly more accurate than the GPS data provided by standard drones.

On the other hand, if you are working on a project that doesn't require as much precision, such as general land mapping or agricultural surveying, then a non-RTK drone may be sufficient for your needs. In these cases, the lower cost and simpler operation of a non-RTK drone may be more practical.

Ultimately, the decision to use an RTK-enabled drone for mapping depends on the specific requirements of your project. If you are unsure whether you need an RTK drone or not, it's always recommended to consult with an expert in the field or the drone manufacturer for their specific recommendations.