{"groups":[{"group":0,"visual_support_halfwidth_m":15,"quads":13529,"source":"MDS DGT native 0.5m sampled at1m; local ortho RGB","excludes":"No invented blocks, submerged base, wall thickness or new crest imposed"},{"group":1,"visual_support_halfwidth_m":4,"quads":3297,"source":"MDS DGT native 0.5m sampled at1m; local ortho RGB","excludes":"No invented blocks, submerged base, wall thickness or new crest imposed"},{"group":2,"visual_support_halfwidth_m":3.5,"quads":876,"source":"MDS DGT native 0.5m sampled at1m; local ortho RGB","excludes":"No invented blocks, submerged base, wall thickness or new crest imposed"}],"triangles":35404,"geometry":"Observed MDS top surface alternative; not a certified solid engineering reconstruction","missing_or_steep_quads":"omitted","hydraulic_change":false}