English: I who am a contributor drew the picture by a software which developed by myself.
The survey map which I referred to depends on "「宇和奈辺陵墓参考地整備工事予定区域事前調査」『書陵部紀要』第73号〔陵墓篇〕(2022年)". This is a drawing of present situation (not a drawing of a restored mound).
The drawing depends on wire frame. Perspective projection.