@bibouba.
If you maybe return to battlefield , do not forget to make some digital photos from 100 mt more advance of road of Belle Alliance.
So is possible to see little dale in confront with my picture with map editor.
Also to judge the map editor rendering and risolution of srtm , if they are enough good to give a idea.
If you want,is clear.
Hello,
Yesterday evening, at dusk, I went to the battlefield and went down the small dale between both ridges.
My digital camere is currently out of use but I tried to show on map and picture what I saw (and didn't) from this position
The light yellow area shows the part of the fild out of my line of sight. I was totally hidden from the Mont Saint Jean ridge until the convent at the right (near the culminating point 133).
To make it more clear I did the same on the picture found on the link you gave yesterday. For people not familiar with the Battlefield I put a legend of the most important points of this topic
I hope it helps
Regards
Frédéric