Based on my experience with Zedgraph I could not set both of X and Y axes scale same to have a correct scatter graph! Assume we have a square grid of 10x10m cells in which each cell is a square shape 1x1m. when we try to draw points of such data, the output is not acceptable because each axis scaled to different scale. It is worse when we try to call Zoomall, then we find all points are fitted to chart area regardless their equal spacing! I hope someone can help me to find a solution. Although Zedgraph is flexible library but this is a big fault!