Is there a legend for Topomaps?

[abrogard]

I like Topomaps for Ukraine and Russia but I have not found a legend for it. Is there one somewhere?

In particular I would like to know what the network of solid black lines is. I suspect it might be the power distribution grid. There's a fine representative selection on the Western bank of the Seim up there level with Koronevo.

[tikhpetr]

https://disk.yandex.ru/i/9MVcta7yRahjmQ - link to source

[abrogard]

That's wonderful. Thanks.