I who am a contributor drew the picture by a software which developed by myself. The survey map which I referred to depends on "樫田 誠「第Ⅲ章 前・中期古墳 第2節 前・中期古墳の調査 5.Ⅴ支群の調査」『河田山古墳群』石川県小松市(小松市埋蔵文化財センター)(2020年)". This is a drawing of present situation (not a drawing of a restored mound).
The drawing depends on combination of wire frame and height eight phases classification. Perspective projection.