Thanks to the recent technical progresses implemented in modern seismic recording instrumentation, the data acquisition for both methods can now be combined into one single operation, which results as a substantial reduction of the costs for field work. This allows to tap the full potential of the information contained in the data by an appropriate joint data processing procedure. Although the results of the reflection seismic data processing and the refraction tomography evaluation are based on the same data set, they are completely independent from each other, which enhances the reliabililty of a joint interpretation. The latter is further assisted by a suitable presentation of two results whereby the drawbacks of one method are compensated by benefits of the other.