That is indeed a larger deviation than about hundred meters, making clear I had used another source (as mentioned, very probably it was some map or document of Energinet). Some times there are two or more sources contradicting each other. We suffer about that for the grid scheme as well, but it is inherent in mapping and researching things like this.
When applying the image to the map using a not-that-fancy but rather effective tool (GE screen overlay), it looks like this.
I definately agree this is unacceptable - of course considering the map in the 50Hertz report is correct, and we can see also this drawing of 50Hertz itself is not
that correct as we apply the overlay and look for the positions of the main roads, the harbour and the dot named Bentwisch.
- Kontek Bentwisch overlay
- Kontek Bentwisch overlay.jpg (239.35 KiB) 8785 keer bekeken
In the previous years, this trick was applied dozens of times before with source material of foreign grid operators to derive cable tracks with acceptable precision if no other source is available. It is just the best we've got since hidden layers in Openstreetmap are not open to us to be reused. It poses a danger of deforming the images and tracks because sometimes the reference landscape (roads, coastlines) are course or deformed. Then a middle way between warping the image and deriving the cable track needs to be made. In this, we just trust the mapper for a wise decision.
Example:
- Excavation tracks in the wheat field
- Kontek Bentwisch overlay deviation.jpg (201.5 KiB) 8781 keer bekeken
We see the as-best-as-it-gets screen overlay of 50Hertz, underlayd by the actual gridmap showing the current drawing of Kontek. In the ground of the wheat field, one can clearly see excavation damage. No doubt the cable is there. But in the right lower corner, the cable starts to veer off course considering the 50Hertz map.
Most of the time when a cable is mapped, a combination of this overlay trick and clever judgement of traces in the landscape or soil are judged alltogether by the mapper in order to make the best decision.
Here we have the revisited track, this is the best I can do with the current source materials: considering joint locations (small concrete houses in fences in the fields), excavation damage, tracks in the soil and the 50Hertz map. Up to you to judge.