amazing panorama of Woolwich

Trotting round all the libraries in the Borough - I was very taken with Slade (tucked around the back streets south of Plumstead Common). On the back wall is a huge photograph (and I mean HUGE!) of Woolwich taken from somewhere near the Town Hall. It shows the power station, the old ferry, the autostaker (which must date it!) and all sorts of long gone stuff in the Arsenal. How did it get there? what date is it? what can we see in it?