Hi, I am trying to coarse a mesh using SMS 9.0. It will be used for simulations with RMA2. It is a much detailed river+lake mesh. I would like to make the long river arm 1-D. Anyone knows if that is possible? I am merging the triangles in the center of the lake, but the resulting mesh doesn't look good at all. Whenever there are islands and near the margins the merging process seems to have been linking nodes over land. Is there a way to avoid this? Thanks, Lin