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Appendix E: MOSS data for roadsData for the construction of roads and associated structures are often provided in the form of MOSS data strings. Forlong sections, points on the string are given coordinates (x, y and z), chainage, whole circle bearing of the line at thatpoint and radius of vertical curvature. Each longitudinal string is given a reference code. For cross sections at agiven chainage, points are defined in terms of their coordinates (x, y and z), an offset distance, usually from thecentre-line, and a reference to the codes of the longitudinal strings.In common with all computer software based design and build packages, formats and protocols, MOSS is subject tochange and improvement. Indeed, MOSS is not the only format and the setting-out engineer is encouraged to keepabreast of developments.Dated examples of data for longitudinal and cross sections are given below and opposite. When checking the dataprovided, ensure that the various strings etc. have been properly identified and clearly understood.Table 4Sample of main line MOSS data, as a cross-sectionModel section report: Chainage 2250POINT X Y Z OFFSET LABELCUT3 7582.732 7074.441 188.239 −11.568 CNER4 7581.722 7071.597 188.241 −8.550 CLO15 7579.278 7064.718 188.423 −1.250 CLI1 (Channel line)6 7579.275 7064.709 188.523 −1.240 KLI1 (Channel line, offset 1.25 m)7 7578.860 7063.540 188.423 0.000 M501 (Top of kerb, offset 1.24 m)8 7578.445 7062.372 188.523 1.240 KRII (Main line)9 7574.442 7062.362 188.423 1.250 CR I1 (Top of kerb)10 7575.998 7055.483 188.241 8.550 CRO1 (Channel)11 7575.073 7052.880 188.172 11.312 CLB3 (Channel)12 7575.070 7052.871 188.272 11.322 KLB3 (Channel in lay-by)13 7574.407 7051.005 188.323 13.302 KGAI (Kerb in lay-by)14 7574.404 7050.996 188.273 13.312 CGAITable 5Sample of MOSS string running along a channel linePOINT X Y Z Chainage Bearing Radius of vertical curvature3 6348.067 7679.230 175.854 870.000 115 54 48.5 660.0004 6357.028 7674.792 176.210 880.000 116 46 53.7 660.0005 6365.921 7670.219 176.562 890.000 117 38 58.9 660.0006 6374.744 7665.511 176.910 900.000 118 31 4.2 660.0007 6383.494 7660.670 177.254 910.000 119 23 9.4 660.0008 6384.421 7660.147 177.290 911.064 119 28 42.0 660.0009 6387.841 7658.201 177.424 915.000 119 48 18.2 723.25410 6392.172 7655.701 177.593 920.000 120 10 37.4 823.52711 6396.487 7653.175 177.762 925.000 120 30 2.9 956.07912 6400.789 7650.627 177.929 930.000 120 46 34.8 1139.486CIRIA C709131