[DRG]

As I said. I generated a map of the area around where I live and it was near perfect AND that includes a river but I know contours can be misread by map making software. Before I could build a house on my property I had to have it surveyed because the county had most of it shown as floodplain...but it's not......not even close but one section of the river nearby had steep banks that the original map makers interpreted incorrectly which affected all the contours around it and indicated my property was about 40 ft lower than it actually is.

So...... looking at the Villers map the problem is much the same plus as was pointed out the way SP creates elevations can be deceiving ....couple the two together in just the wrong way and you get a steep-sided canyon where there isn't one so thinking more now that this is something that has to be evaluated by a map maker on an individual basis and adjusted as necessary and not taken as holy writ. Once I filled in the questionable section it seemed much more "normal" looking