alter Sack

We are a surveying office and we have to provide data for a specialist planner to process in PVsyst. We need to prepare and export a terrain model. We have various options available to us. Finally, the terrain model should be imported into PVsyst and a system should be developed. The terrain model should contain parcel boundaries and a distance line to the forest. What is the best way to proceed and in which format should the export ideally take place?