Here lurk gremlins
Years and years ago I included a routine in my data collection software to automatically draw a saguaro cactus to scale. Nothing to it, really: SAG9 will draw a saguaro 9 feet tall, with the cross at the bottom the horizontal location.
Today I was collecting elevations on a site and came across two transplanted saguaros, so I located them. When I ran the file into AutoCAD they both drew something like 30 feet tall instead of 5 feet. Now why would something that has run perfectly for decades do a fizzle? Ah, usually I do the horizontal first, then the grid elevations and break lines. I located these saguaros while getting grid shots, and I didn’t want to plot the elevation, so the code was NOEL/SAG5. For whatever reason, the culprit was NOEL plus SAG, lurking all these years and just waiting for the right combination of descriptors.
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