| Label | Concept definition | Figure(s) | Attribute value type | EQ label | Code |
|---|---|---|---|---|---|
| LADDER_PRESENT | An indication that a fixed or moveable ladder is present within or on an <OBJECT>. | BOOLEAN | 533 | ||
| LAMBERT_LAW_CONSTANT | The parameter used in the Lambert Law equation for calculating <WATERBODY_FLOOR> acoustic scattering; Lambert Law constant. | REAL | PURE_NUMBER | 534 | |
| LAND_ROUTE_SLOPE_SEGMENT- _LENGTH |
The length of a <LAND_TRANSPORTATION_ROUTE> segment having a slope (rise/run) greater than 0,07 for a <ROAD>, or greater than 0,03 for a <RAILWAY>. | REAL | LENGTH | 535 | |
| LAND_ROUTE_TYPE | The type of a <LAND_TRANSPORTATION_ROUTE>. | ENUMERATION | 536 | ||
| LAND_ROUTE_USABLE_WEATHER_TYPE | The type of weather conditions under which a <LAND_TRANSPORTATION_ROUTE> is usable. | ENUMERATION | 537 | ||
| LAND_TRANSPORTATION_ROUTE- _SURFACE_TYPE |
The composition of the <SURFACE> of a <LAND_TRANSPORTATION_ROUTE>; land transportation route surface type. | ENUMERATION | 538 | ||
| LAND_TRNSP_MEDIAN_PRESENT | An indication that a median divider is present between multiple <ROUTE_LANE_LAND>s or tracks in a <LAND_TRANSPORTATION_ROUTE>. | BOOLEAN | 539 | ||
| LAND_TRNSP_MEDIAN_WIDTH | The <<WIDTH>> of the divider between multiple <ROUTE_LANE_LAND>s or tracks in a <LAND_TRANSPORTATION_ROUTE>; land transportation median width. | REAL | LENGTH | 540 | |
| LANDING_CRAFT_TYPE | The type of a <LANDING_CRAFT>. | ENUMERATION | 541 | ||
| LANDING_DISTANCE_AVAILABLE | The <<LENGTH>> of a <RUNWAY> that is declared available and suitable for the ground run of an <AIRCRAFT> landing; landing distance available. | REAL | LENGTH | 542 | |
| LANDING_LIGHT_INTENSITY | A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of external <LIGHTING> on an <AIRCRAFT> that is used to illuminate the <LAND> during landing procedures. Zero means unlit and one means maximum intensity. | REAL | PURE_NUMBER | 543 | |
| LANE_COUNT | The number of <ROUTE_LANE>s in a <TRANSPORTATION_ROUTE>; lane count. | COUNT | 544 | ||
| LANE_MARKING_TYPE | The type of lane marking on a <ROAD> or <RUNWAY>. | ENUMERATION | 545 | ||
| LARGE_SCALE_PRECIPITATION | The component of <<ACCUM_PRECIP_DENSITY>> caused by a non-convective <PRECIPITATION> in a mesoscale or larger <REGION>; large scale precipitation. | REAL | SURFACE_DENSITY | 546 | |
| LARGE_TANKER_DENSITY | The areal density of large tanker <WATER_SURFACE_VESSEL>s (dead weight greater than 159 000 kilograms (approximately 175 000 tons) and less than or equal to 318 000 kilograms (approximately 350 000 tons) and <<LENGTH>> of approximately 300 to 325 metres) in a <WATERBODY_SURFACE_REGION>. | REAL | AREAL_ENTITY_DENSITY | 547 | |
| LATENT_HEAT_FLUX | The rate of heat flow per unit <<MASS>> for a <SYSTEM> in a reversible, isobaric-isothermic change of phase; latent heat flux. | REAL | IRRADIANCE | 548 | |
| LATENT_HEAT_FUSION | The amount of energy per unit <<MASS>> of an <OBJECT> required to change its <<PHYSICAL_STATE>> from solid to liquid; latent heat (fusion). | REAL | SPECIFIC_ENERGY | 549 | |
| LATENT_HEAT_SUBLIMATION | The amount of energy per unit <<MASS>> of an <OBJECT> required to change its <<PHYSICAL_STATE>> from solid to gas; latent heat (sublimation). | REAL | SPECIFIC_ENERGY | 550 | |
| LATENT_HEAT_VAPOURIZATION | The amount of energy per unit <<MASS>> of an <OBJECT> required to change its <<PHYSICAL_STATE>> from liquid to gas; latent heat (vapourization). | REAL | SPECIFIC_ENERGY | 551 | |
| LEAF_AREA_INDEX | The single sided leaf area (projected) per unit <<AREA>> of <LAND>; leaf area index. | REAL | PURE_NUMBER | 552 | |
| LEFT_ABOVE_BANK_ANGLE | The angle from the horizontal plane to the portion above the mean level of the <WATERBODY_SURFACE> of the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>. | REAL | PLANE_ANGLE | 553 | |
| LEFT_ABOVE_BANK_SLOPE | The <<TERRAIN_SLOPE>> of the portion above the mean level of the <WATERBODY_SURFACE> of the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>. | REAL | PURE_NUMBER | 554 | |
| LEFT_BANK_HEIGHT | The <<HEIGHT>> of the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE> measured from the mean level of the <WATER> to the first break in <<TERRAIN_SLOPE>> above the mean level of the <WATER>. | REAL | LENGTH | 555 | |
| LEFT_BANK_SLOPE | The <<TERRAIN_SLOPE>> of the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE> measured from the mean level of the <WATER> to the first accessible break in slope above the mean level of the <WATER>. | REAL | PURE_NUMBER | 556 | |
| LEFT_BANK_SOIL_CONE_INDEX | The <<SOIL_CONE_INDEX>> of a left <WATERBODY_BANK>. | REAL | PRESSURE | 557 | |
| LEFT_BANK_VEGETATION_DENSITY | A number between 0 and 1 inclusive representing the linearly-scaled fractional density of <VEGETATION> found on the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE> as a linearly-scaled fraction of bank <<AREA>>. | REAL | PURE_NUMBER | 558 | |
| LEFT_BELOW_BANK_ANGLE | The angle from the horizontal plane to the portion below the mean level of the <WATERBODY_SURFACE> of the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>, below the mean level of the <WATER>. | REAL | PLANE_ANGLE | 559 | |
| LEFT_BELOW_BANK_SLOPE | The <<TERRAIN_SLOPE>> of the portion below the mean level of the <WATERBODY_SURFACE> of the left <WATERBODY_BANK> (facing downstream) of a <WATERCOURSE>. | REAL | PURE_NUMBER | 560 | |
| LEFT_TERRAIN_BANK_SLOPE | The <<TERRAIN_SLOPE>> of the left bank of a <TERRAIN_SURFACE_OBJECT> (for example: a <TERRAIN_CUT> and/or an <EMBANKMENT>). | REAL | PURE_NUMBER | 561 | |
| LENGTH | The length measured in the horizontal plane of the longer of two orthogonal linear axes of an <OBJECT>. For a square <OBJECT>, either axis may be measured. For a round <OBJECT>, the <<OUTSIDE_DIAMETER>> is measured. For a <BRIDGE>, the distance between the <BRIDGE_PIER>s is measured. | REAL | LENGTH | 562 | |
| LF_ACOUSTIC_SCTR_LAYER- _BOTTOM_DEPTH |
The <<DEPTH_BELOW_WATERBODY_SURFACE>> of the lower (bottom) <BOUNDARY> of a low acoustic <<FREQUENCY>> scattering layer. | REAL | LENGTH | 563 | |
| LF_ACOUSTIC_SCTR_LAYER_TOP- _DEPTH |
The <<DEPTH_BELOW_WATERBODY_SURFACE>> of the upper (top) boundary of a low acoustic <<FREQUENCY>> scattering layer. | REAL | LENGTH | 564 | |
| LF_BOTTOM_LOSS_REGION- _IDENTIFIER |
In a <WATERBODY>, the numeric identifier of a low acoustic <<FREQUENCY>> bottom loss <REGION>. | INDEX | 565 | ||
| LIFT_TYPE | The type of a <LIFT> based on the kind of <OBJECT>s it is intended to transport. | ENUMERATION | 566 | ||
| LIFTED_ATMOSPHERE_STABILITY- _INDEX |
A stability index used to determine the occurrence of severe weather; lifted atmosphere stability index. The lifted atmosphere stability index, LI, is defined by LI = T5 - LTS(degrees Celsius), where T5 is the dry-bulb <<AIR_TEMPERATURE>> at 500 hectopascals and LTS is the <<AIR_TEMPERATURE>> of a parcel of <AIR> at the <PLANETARY_SURFACE> lifted adiabatically to 500 hectopascals. | REAL | THERMO_TEMPERATURE | 567 | |
| LIFTING_CAPACITY | The maximum weight that an <EQUIPMENT> can lift; lifting capacity. | REAL | MASS | 568 | |
| LIGHT_BEAM_SPREAD | Twice the angle from the beam axis at which the intensity of a <LIGHT> is 10 percent of its maximum value; light beam spread. For an omni-directional light, the light beam spread is 360 arc degrees. | REAL | PLANE_ANGLE | 569 | |
| LIGHT_COLOUR | The colour emitted from a <LIGHT>. | ENUMERATION | 570 | ||
| LIGHT_ELEVATION | The <<ELEVATION>> of a <LIGHT>. | REAL | LENGTH | 571 | |
| LIGHT_EXHIBITION_CONDITION | The exhibition condition of a <LIGHT>. | ENUMERATION | 572 | ||
| LIGHT_FUNCTION | The function of a <LIGHT>. | ENUMERATION | 573 | ||
| LIGHT_ICE_ACCRETION- _PROBABILITY |
The probability of light accretion of <ICE> on the <SURFACE>s of <MARINE_OBJECT>s. Such accretion can occur on <SURFACE>s on top of, over, or near a <WATERBODY_SURFACE> when the ambient <<AIR_TEMPERATURE>> is equal to or below 271,15 kelvin (-2 degrees Celsius) and the <<WIND_SPEED>> is greater than or equal to 11,32 metres per second (22 knots). | REAL | PURE_NUMBER | 574 | |
| LIGHT_MULTIPLICITY | The number of <LIGHT>s of identical character that exist as a co-located <SET>; light multiplicity. | COUNT | 575 | ||
| LIGHT_PATTERN | The type of sequence, grouping, and/or distinctive character of a <LIGHT>; light pattern. | ENUMERATION | 576 | ||
| LIGHT_PERIOD | The <<TIME_QUANTITY>> occupied by an entire cycle of intervals of light and dark of a <LIGHT>; light period. | REAL | TIME | 577 | |
| LIGHT_RELATIVE_LOCATION | The relative horizontal <LOCATION> of a <LIGHT> in a range of two or three <LIGHT>s; light relative location. | ENUMERATION | 578 | ||
| LIGHT_SECTOR_ANGLE | The horizontal angular sector limits of the visibility of a <LIGHT>; light sector angle. Limits of sectors and arcs of visibility are arranged clockwise and are given from seaward toward the <LIGHT>. | REAL | PLANE_ANGLE | 579 | |
| LIGHT_SUPERVISED | An indication that a <LIGHT> is supervised. | BOOLEAN | 580 | ||
| LIGHT_TYPE | The type of a <LIGHT>. | ENUMERATION | 581 | ||
| LIGHT_VISIBILITY_RANGES | A set of two numbers defining the range of visibility at a <LIGHT> in nautical miles. The value is formatted in a Basic Latin string as a pair of numbers separated by a slash ("/") if only two visibilities exist or by a dash ("-") separating the greatest and least visibilities if three or more visibilities exist. | CONSTRAINED_STRING | 583 | ||
| LIGHT_VISIBILITY_TYPE | The type of specific visibility of a <LIGHT>, with respect to the intensity of the <LIGHT> and ease of recognition. | ENUMERATION | 582 | ||
| LIGHTING_CHARACTERIZATION | The qualitative characterization of lighting intensity. | ENUMERATION | 584 | ||
| LIGHTNING_CURRENT_STRENGTH | The strength of the discharge current flowing in a stroke of <LIGHTNING>, usually in the return stroke. | REAL | ELECTRIC_CURRENT | 585 | |
| LIGHTNING_DATA_CONSISTENCY | The quantity of the chi-square statistical agreement between cloud-to-ground detections of <LIGHTNING>; lightning data consistency. | REAL | PURE_NUMBER | 586 | |
| LIGHTNING_DETECTOR_COUNT | The number of detectors reporting a discharge of <LIGHTNING>; lightning detector count. | COUNT | 587 | ||
| LIGHTNING_LOC_ERR_ELLPS_ANGLE | The <<GEODETIC_AZIMUTH>> of the semi-major axis of the error ellipse of the <LOCATION> of a stroke of <LIGHTNING>; lightning location error ellipse angle. | REAL | PLANE_ANGLE | 588 | |
| LIGHTNING_LOC_ERR_ELLPS- _MAJOR_AXIS |
The <<LENGTH>> of the semi-major axis of the error ellipse at the <LOCATION> of a stroke of <LIGHTNING>. | REAL | LENGTH | 589 | |
| LIGHTNING_LOC_ERR_ELLPS- _MINOR_AXIS |
The <<LENGTH>> of the semi-minor axis of the error ellipse at the <LOCATION> of a stroke of <LIGHTNING>. | REAL | LENGTH | 590 | |
| LIGHTNING_POLARITY | The polarity of a stroke of <LIGHTNING>. | ENUMERATION | 591 | ||
| LIGHTNING_PROBABILITY | The probability that <LIGHTNING> will occur. | REAL | PURE_NUMBER | 592 | |
| LIGHTNING_STROKE_COUNT | The number of strokes of <LIGHTNING> that constitute a single <LIGHTNING> discharge; lightning stroke count. | COUNT | 593 | ||
| LIGHTNING_TIME_ADJUSTMENT | The <<TIME_QUANTITY>> added to the observation time of a stroke of <LIGHTNING> to account for increased accuracy; lightning time adjustment. | REAL | TIME | 594 | |
| LINEAR_ATTENUATION_COEFFICIENT | The coefficient denoting the rate of reduction in value over the unit <<LENGTH>>; linear attenuation coefficient. | REAL | INV_LENGTH | 595 | |
| LIQUID_CAPACITY | The amount of liquid an <OBJECT> is capable of carrying, storing, or delivering; liquid capacity. | REAL | VOLUME | 596 | |
| LITTORAL_CURRENT_EAST_SPEED | The <<WATER_CURRENT_SPEED>> in a <SURF_ZONE> in the geodetic east-west <DIRECTION>, where east is positive; littoral current east speed. | REAL | SPEED | 597 | |
| LITTORAL_CURRENT_NORTH_SPEED | The <<WATER_CURRENT_SPEED>> in a <SURF_ZONE> in the geodetic south-north <DIRECTION>, where north is positive; littoral current north speed. | REAL | SPEED | 598 | |
| LITTORAL_CURRENT_U_SPEED | The <<WATER_CURRENT_SPEED>> in a <SURF_ZONE> in the X <DIRECTION> of a projection-based coordinate system, where +X is positive; littoral current "U" speed. | REAL | SPEED | 599 | |
| LITTORAL_CURRENT_V_SPEED | The <<WATER_CURRENT_SPEED>> in a <SURF_ZONE> in the Y <DIRECTION> of a projection-based coordinate system, where +Y is positive; littoral current "V" speed. | REAL | SPEED | 600 | |
| LIVING_ORGANISM_COMMON_NAME | A common name for a <LIVING_ORGANISM>. | STRING | 601 | ||
| LIVING_ORGANISM_SCIENTIFIC- _NAME |
The two-part Latinized name for a <LIVING_ORGANISM>, consisting of a capitalized generic name followed by a usually non-capitalized specific epithet; living organism scientific name. | STRING | 602 | ||
| LOAD_CLASS_ONE_WAY_TRACKED | The dynamic live load weight-bearing capacity of a <BRIDGE> or <BRIDGE_SPAN> for one-way, tracked <GROUND_VEHICLE> traffic; load class one-way tracked. This is also known as the military load classification, type 3. | REAL | MILITARY_LOAD_CLASS | 603 | |
| LOAD_CLASS_ONE_WAY_WHEELED | The dynamic live load weight-bearing capacity of a <BRIDGE> or <BRIDGE_SPAN> for one-way, wheeled <GROUND_VEHICLE> traffic; load class one-way wheeled. This is also known as the military load classification, type 1. | REAL | MILITARY_LOAD_CLASS | 604 | |
| LOAD_CLASS_TWO_WAY_TRACKED | The dynamic live load weight-bearing capacity of a <BRIDGE> or <BRIDGE_SPAN> for two-way, tracked <GROUND_VEHICLE> traffic; load class two-way tracked. This is also known as the military load classification, type 4. | REAL | MILITARY_LOAD_CLASS | 605 | |
| LOAD_CLASS_TWO_WAY_WHEELED | The dynamic live load weight-bearing capacity of a <BRIDGE> or <BRIDGE_SPAN> for two-way, wheeled <GROUND_VEHICLE> traffic; load class two-way wheeled. This is also known as the military load classification, type 2. | REAL | MILITARY_LOAD_CLASS | 606 | |
| LOCAL_AZIMUTH | The <<VECTOR_AZIMUTH_LOCAL>> in the horizontal plane at the observer's location from an azimuthal reference vector, to either a <LINE> passing through the observer, or a vector relative to the observer, or the direction from the observer to an <OBJECT> or <LOCATION>. | REAL | PLANE_ANGLE | 607 | |
| LOCATION_ACCURACY_METHOD | The method used to determine the accuracy of a <LOCATION>. | ENUMERATION | 608 | ||
| LOCATION_ACCURACY_STATEMENT | A statement of the accuracy of a <LOCATION>. | ENUMERATION | 609 | ||
| LONGEST_BRIDGE_SPAN_LENGTH | The <<LENGTH>> of the longest <BRIDGE_SPAN> of a <BRIDGE>. | REAL | LENGTH | 610 | |
| LOW_CLOUD_BASE_LEVEL | The <<CLOUD_BASE_LEVEL>> of a <LOW_CLOUD>. | REAL | LENGTH | 611 | |
| LOW_CLOUD_COVERAGE | A number between 0 and 1 inclusive representing the linearly-scaled fraction of the sky covered by <LOW_CLOUD>s; low cloud coverage. Zero means no <LOW_CLOUD>s and one means completely covered. | REAL | PURE_NUMBER | 612 | |
| LOW_CLOUD_GENUS | The genus of a <LOW_CLOUD>. | ENUMERATION | 613 | ||
| LOW_CLOUD_TOP_LEVEL | The <<CLOUD_TOP_LEVEL>> of a <LOW_CLOUD>. | REAL | LENGTH | 614 | |
| LOW_CLOUD_TYPE_OBSERVED | The type of observed <LOW_CLOUD>s. | ENUMERATION | 615 | ||
| LOWER_LAYER_SOIL_TEMPERATURE | The <<TEMPERATURE>> of the <SOIL> between five and 100 centimetres below the <SURFACE> of the <TERRAIN>; lower layer soil temperature. | REAL | THERMO_TEMPERATURE | 616 | |
| LOWEST_AIRSPACE_ALTITUDE | The least <<HEIGHT_AGL>> of all <LOCATION>s in or on the boundary of an <AIRSPACE>; lowest airspace altitude. | REAL | LENGTH | 617 | |
| LOWEST_AIRSPACE_ALTITUDE_LIMIT | The <<LOWEST_AIRSPACE_ALTITUDE>> limit. | REAL | LENGTH | 618 | |
| LOWEST_ANNUAL_GROUND_WATER- _LEVEL |
The lowest annual mean level of ground <WATER>. | REAL | LENGTH | 619 | |
| LOWEST_CLOUD_BASE_LEVEL | The <<CLOUD_BASE_LEVEL>> of the lowest <CLOUD>; lowest cloud base level. | REAL | LENGTH | 620 | |
| LOWEST_CLOUD_COVER_CATEGORY | A category indicating the <<LOW_CLOUD_COVERAGE>> or, if no <LOW_CLOUD>s are present, the <<MIDDLE_CLOUD_COVERAGE>>; lowest cloud cover category. | ENUMERATION | 621 | ||
| LOWEST_ELEVATION | The least <<ELEVATION>> to any <LOCATION> associated with an <OBJECT>; lowest elevation. | REAL | LENGTH | 622 | |
| LUMINOUS_LIGHT_RANGE | The maximum distance at which a <LIGHT> can be seen under existing visibility conditions and taking no account of the <<HEIGHT_AGL>> of the <LIGHT>, the <<HEIGHT_AGL>> of the observer's eye, the curvature of the <EARTH>, or interference from background <LIGHTING>; luminous light range. | REAL | LENGTH | 623 | |
| LUNAR_DIFFUSED_IRRADIANCE | The diffused lunar incident flux (irradiance) per unit <<AREA>> of the <SURFACE> of an <OBJECT>. | REAL | IRRADIANCE | 624 | |
| LUNAR_DIRECT_IRRADIANCE | The direct lunar incident flux (irradiance) per unit <<AREA>> of the <SURFACE> of an <OBJECT>. | REAL | IRRADIANCE | 625 | |
| LUNAR_ILLUMINATION_FRACTION | A number between 0 and 1 inclusive representing the linearly-scaled fraction of the apparent circular disk of the <MOON> that is illuminated by the <SUN>; lunar illumination fraction. Zero means that none of the apparent circular disk is illuminated and one means that all of the apparent circular disk is illuminated. | REAL | PURE_NUMBER | 626 | |
| LUNAR_RADIANCE_AZIMUTH- _GEODETIC |
The lunar <<INCIDENCE_AZIMUTH_GEODETIC>>; lunar radiance azimuth geodetic. | REAL | PLANE_ANGLE | 627 | |
| LUNAR_RADIANCE_ELEV_ANGLE- _HORIZONTAL |
The lunar <<INCIDENCE_ELEV_ANGLE_HORIZONTAL>>; lunar radiance elevation angle horizontal. | REAL | PLANE_ANGLE | 628 |
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