Table 6.12 — EAs whose label begins with H
| Label | Concept definition | Attribute value type | EQ label | Code |
| HAIL_SIZE | The <<OUTSIDE_DIAMETER>> of the largest <HAIL> observed; hail size. | REAL | LENGTH | 435 |
| HALLWAY_TYPE | The type of a <HALLWAY>. | ENUMERATION | 436 | |
| HARBOUR_FACILITY_TYPE | The type of operation and/or service supported by a <FACILITY> at a <HARBOUR>. | ENUMERATION | 437 | |
| HARBOUR_IDENTIFIER | The textual identifier of a <HARBOUR>. | STRING | 438 | |
| HAZARD_MARKER_TYPE | The type of a <HAZARD_MARKER>. | ENUMERATION | 439 | |
| HAZARD_SEVERITY | The severity of a hazard. | ENUMERATION | 440 | |
| HAZARDOUS_GAS_TYPE | The type of hazardous gas present within an <OBJECT>. | ENUMERATION | 441 | |
|
HEAVY_ICE_ACCRETION- _PROBABILITY |
The probability of heavy 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 | 442 |
| HEIGHT | The vertical distance from a <LOCATION> on the base (lowest point) of an <OBJECT> to a <LOCATION> on its top (highest point) that gives the greatest value of distance; the height. | REAL | LENGTH | 443 |
| HEIGHT_ABOVE_FLOOR | The height measured vertically from a <FLOOR> to the <LOCATION> on the base (lowest point) of an <OBJECT> that gives the least value of height. | REAL | LENGTH | 444 |
| HEIGHT_ABOVE_SURFACE_LEVEL | The <<HEIGHT>> of an <OBJECT> on a <PLANETARY_SURFACE>. | REAL | LENGTH | 445 |
| HEIGHT_ABOVE_WATERBODY_FLOOR | The height of an <OBJECT> measured vertically from a <WATERBODY_FLOOR> to the base (lowest portion) of the <OBJECT>. | REAL | LENGTH | 446 |
| HEIGHT_AGL | The distance of an <OBJECT> above a <PLANETARY_SURFACE>; the height AGL. | REAL | LENGTH | 447 |
| HELIPAD_COUNT | The number of <HELICOPTER_LANDING_PAD>s associated with an <OBJECT>; the helipad count. | COUNT | 448 | |
|
HEMISPHERICAL_DIRECTIONAL- _REFLECTIVITY |
The ratio, for a particular material <SURFACE> and unit solid angle about a particular reflection <DIRECTION>, of the reflected <<RADIANCE>> into that solid angle to the purely diffuse, total incident <<RADIANCE>> from the hemisphere above that <SURFACE>. This quantity is also defined as the integral over the incident hemisphere of the BRDF times the cosine of the angle between the surface normal and the incidence <DIRECTION> times the differential incident solid angle. It is a function of the <<REFLECTANCE_ZENITH_ANGLE_LOCAL>> and <<REFLECTANCE_AZIMUTH_LOCAL>> of the reflected <<RADIANCE>> and is spectral (a distribution function in <<WAVELENGTH>>); therefore the quantity is measured in terms of inverse <<WAVELENGTH>> bin size. | REAL | INV_LENGTH | 449 |
|
HEMISPHERICAL_HEMISPHERICAL- _REFLECTIVITY |
The ratio, for a particular material <SURFACE>, of the flux density reflected into the hemisphere above this <SURFACE> to the flux density incident upon it from all <DIRECTION>s within this hemisphere. This quantity is also defined as the ratio A/B, where A is the integral (over the incident hemisphere) of the incident <<RADIANCE>> times the cosine of the angle between the surface normal and the incident <DIRECTION> times the <<DIRECTIONAL_HEMISPHERICAL_REFLECTIVITY>> times the unit solid incident angle and B is the same integral without the <<DIRECTIONAL_HEMISPHERICAL_REFLECTIVITY>>. This quantity may also be known as the "total" or "bi-hemispherical" reflectivity and is spectral (a distribution function in <<WAVELENGTH>>); therefore the quantity is measured in terms of inverse <<WAVELENGTH>> bin size. | REAL | INV_LENGTH | 450 |
|
HF_ACOUSTIC_SCTR_LAYER- _BOTTOM_DEPTH |
The <<DEPTH_BELOW_WATERBODY_SURFACE>> of the lower (bottom) <BOUNDARY> of a high frequency scattering layer. | REAL | LENGTH | 451 |
|
HF_ACOUSTIC_SCTR_LAYER_TOP- _DEPTH |
The <<DEPTH_BELOW_WATERBODY_SURFACE>> of the upper (top) <BOUNDARY> of a high frequency scattering layer. | REAL | LENGTH | 452 |
|
HF_BOTTOM_LOSS_REGION- _IDENTIFIER |
In a <WATERBODY>, the numeric identifier of a high frequency bottom loss <REGION>. | INDEX | 453 | |
| HIGH_CLOUD_BASE_LEVEL | The <<CLOUD_BASE_LEVEL>> of a <HIGH_CLOUD>. | REAL | LENGTH | 454 |
| HIGH_CLOUD_COVERAGE | The fraction of the sky covered by <HIGH_CLOUD>s. | REAL | PURE_NUMBER | 455 |
| HIGH_CLOUD_GENUS | The genus of a <HIGH_CLOUD>. | ENUMERATION | 456 | |
| HIGH_CLOUD_TOP_LEVEL | The <<CLOUD_TOP_LEVEL>> of a <HIGH_CLOUD>. | REAL | LENGTH | 457 |
| HIGH_CLOUD_TYPE_OBSERVED | The type of observed <HIGH_CLOUD>s. | ENUMERATION | 458 | |
| HIGHEST_AIRSPACE_ALTITUDE | The greatest <<HEIGHT_AGL>> of all <LOCATION>s in or on the boundary of an <AIRSPACE>; the highest airspace altitude. | REAL | LENGTH | 459 |
|
HIGHEST_AIRSPACE_ALTITUDE- _LIMIT |
The <<HIGHEST_AIRSPACE_ALTITUDE>> limit. | REAL | LENGTH | 460 |
|
HIGHEST_ANNUAL_GROUND_WATER- _LEVEL |
The highest annual mean level of ground <WATER>. | REAL | LENGTH | 461 |
| HIGHEST_ELEVATION | The greatest <<ELEVATION>> to any <LOCATION> associated with an <OBJECT>. | REAL | LENGTH | 462 |
| HINDUISM_DENOMINATIONAL_FAMILY | The designation of a <NON_EMPTY_SET> of closely related Hindu religious traditions, often ones which were at one time part of a single movement but are now separate religious denominations; the Hinduism denominational family. | ENUMERATION | 463 | |
|
HISTORICAL_CLOUD_FREE_LINE- _OF_SIGHT_CLIMATOLOGY |
The historical (climatology) probability of a line of sight free of <CLOUD>s. | REAL | PURE_NUMBER | 464 |
| HISTORICAL_SIGNIFICANCE | The historical significance of a <STRUCTURE>. | ENUMERATION | 465 | |
| HORIZONTAL_CLEARANCE | The horizontal distance available to pass a load that extends laterally beyond the wheels of a <GROUND_VEHICLE>. | REAL | LENGTH | 466 |
| HORIZONTAL_CLEARANCE_LIMITED | An indication that limited <<HORIZONTAL_CLEARANCE>> is present. | BOOLEAN | 467 | |
|
HORIZONTAL_LOAD_BEARING- _CAPACITY |
The maximum distributed load per unit <<AREA>> that a horizontal <SURFACE> can support; the horizontal load bearing capacity. | REAL | SURFACE_DENSITY | 468 |
| HOSPITAL_BED_CAPACITY | The number of beds within a <HOSPITAL_BUILDING> or <MEDICAL_FACILITY>. | COUNT | 469 | |
| HOUR_WITHIN_DAY | The ordinal index of the hour within the day, starting with the number "0" at midnight. | COUNT | 470 | |
| HULK_TYPE | The type of a <HULK>. | ENUMERATION | 471 | |
| HUMAN_FUNCTION | The function for which a <HUMAN> has responsibility. | ENUMERATION | 472 | |
| HUMAN_ROLE | The expected function of a <HUMAN> in a particular setting or situation; the human role [SOED, "role", 2.I]. | ENUMERATION | 473 | |
| HYDROGRAPHIC_BARRIER_TYPE | The type of <BARRIER> to hydrographic flow that an <OBJECT> presents. | ENUMERATION | 474 | |
| HYDROGRAPHIC_DEPTH | The least <<DEPTH>> of any <LOCATION> on an <OBJECT> that lies below the <WATERBODY_SURFACE>. The <<DEPTH>> is in reference to a <SURFACE_DATUM>; the hydrographic depth. | REAL | LENGTH | 475 |
| HYDROGRAPHIC_DEPTH_CATEGORY | A category describing the <<HYDROGRAPHIC_DEPTH>>. | ENUMERATION | 476 | |
| HYDROGRAPHIC_DEPTH_INFORMATION | The accuracy or availability of <<HYDROGRAPHIC_DEPTH>> information for an <OBJECT>. | ENUMERATION | 477 | |
| HYDROGRAPHIC_DRYING_HEIGHT | The elevation of a hydrographic <OBJECT> that tidal waters cover and uncover measured to the highest <LOCATION> on the <OBJECT> in reference to a <SOUNDING_DATUM>; the hydrographic drying height. | REAL | LENGTH | 478 |
| HYDROGRAPHIC_OBJECT_ORIGIN | The origin of a hydrographic <OBJECT>. | ENUMERATION | 479 | |
|
HYDROGRAPHIC_SURVEY_CONTACT- _TYPE |
The type of a <HYDROGRAPHIC_SURVEY_CONTACT>. | ENUMERATION | 480 | |
| HYDROLOGIC_PERMANENCE | The persistence of a <HYDROLOGIC_OBJECT>. | ENUMERATION | 481 | |
| HYPSOGRAPHIC_PORTRAYAL_TYPE | The type of a hypsographic portrayal <LINE>. | ENUMERATION | 482 |
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