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The Denver Mapping Party was last weekend (Hi Everybody!) and was a lot of fun. One of the interesting sights that we tagged was a bridge with a helix at one end. It is a pedestrian bridge and at the south end it has stairs but also has a helical ramp to get up to bridge level. It was a little interesting to tag so here is how it was done.

The helix looked like this from the bridge.

The steps were essentially a straight continuation of the path, and they are rendered as such.

The helix begins at local ground level and spirals up to the raised span.