Yes, that tutorial is very good info on one of the many features of TransDEM - taking images (e.g. from Google Earth) or topographic maps and converting them to Trainz assets that can be laid over a Surveyor baseboard. However, while that technique is great for locating rivers, roads, railway tracks, etc it does not provide any terrain height information for Surveyor. For that you still need the satellite data capability of TransDEM.