Table 6.16 — EAs with labels beginning with L
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