18.0 Seabed Sample Encoding
For Field Units who have submitted a feature file containing seabed samples to the Office of Coast Survey, the following S-57 attribution must be used per the legend below.
(m) | Mandatory |
(c) | Conditional |
(r) | Restricted |
18.1 Sediment Size Classification
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18.2 NATSUR/NATQUA Attribution
Attribute | Description | |
NATSUR (m) | Nature of Surface (m) | |
'1' mud (m) | Soft, wet earth. | |
'2' clay (m) | Particles less than 0.002mm; stiff sticky earth that becomes hard when baked. | |
'3' silt (m) | Particles of 0.002 - 0.0625mm; when dried on hand will rub off easily. | |
'4' sand (m) | Particles of 0.0625 - 2.0mm; tiny grains of crushed or worn rock. | |
'5' stone (m) | A general term for rock fragments ranging in size from pebbles and gravel to boulders or a large rock mass. | |
'6' gravel (m) | Particles of 2.0 - 4.0mm; small stones with coarse sand. | |
'7' pebbles (m) | Particles of 4.0 - 64.0mm; small stones made smooth and round by being rolled in water. | |
'8' cobbles (m) | Particles of 64.0 - 256.0mm; stones worn round and smooth by water and used for paving. | |
'9' rock (m) | Any formation of natural origin that constitutes an integral part of the lithosphere. The natural occurring material that forms firm, hard, and solid masses. | |
'11' lava (m) | The fluid or semi-fluid matter flowing from a volcano. The substance that results from the cooling of the molten rock. | |
'14' coral (m) | Hard calcareous skeletons of many tribes of marine polyps. | |
'17' shells (m) | Exoskeletons of various water dwelling animals. | |
'18' boulder (m) | A rounded rock with diameter of 256mm (25.6cm) or larger. | |
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NATQUA (c) | Nature of Surface - qualifying terms (c) | |
'1' fine (c) | Falls within the smallest size continuum for a particular NATSUR term. | |
'2' medium (c) | Falls within the moderate size continuum for a particular NATSUR term. | |
'3' coarse (c) | Falls within the largest size continuum for a particular NATSUR term. | |
'4' broken (c) | Fractured or in pieces. | |
'5' sticky (c) | Having an adhesive or glue like property. | |
'6' soft (c) | Not hard or firm. | |
'7' stiff (c) | Not pliant; thick, resistant to flow. | |
'8' volcanic (c) | Composed of or containing material ejected from a volcano. | |
'9' calcareous (c) | Composed of or containing calcium or calcium carbonate. | |
'10' hard (c) | Firm; usually refers to an area of the seafloor not covered by unconsolidated sediment. | |
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COLOUR (c) | Color (c) | |
'1' white (c) | ||
'2' black (c) | ||
'3' red (c) | ||
'4' green (c) | ||
'5' blue (c) | ||
'6' yellow (c) | ||
'7' grey (c) | ||
'8' brown (c) | ||
'9' amber (c) | ||
'10' violet (c) | ||
'11' orange (c) | ||
'12' magenta (c) | ||
'13' pink (c) |
18.3 NATSUR/NATQUA Allowable Attribute Combinations
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