1DrapeLineExceptions - negative tolerance 2:memory: #use in-memory database 3SELECT AsText(ST_DrapeLineExceptions(GeomFromText('LINESTRING(0 0, 1 1, 3 1, 5 1)', 4326), GeomFromText('LINESTRING Z(0 0 0, 1 1 1, 5 1 2)', 4326), -0.1)); 41 # rows (not including the header row) 51 # columns 6AsText(ST_DrapeLineExceptions(GeomFromText('LINESTRING(0 0, 1 1, 3 1, 5 1)', 4326), GeomFromText('LINESTRING Z(0 0 0, 1 1 1, 5 1 2)', 4326), -0.1)) 7(NULL) 8