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4 : Spatial Reference Information
- Spatial Reference Information -- the description of the reference frame for,
and the means to encode, coordinates in the data set.
- Type: compound
- Short Name: spref
- Spatial_Reference_Information =
- 0{Horizontal_Coordinate_System_Definition}1 +
- 0{Vertical_Coordinate_System_Definition}1
- Horizontal_Coordinate_System_Definition =
- [Geographic |
- 1{Planar}n |
- Local] +
- 0{Geodetic_Model}1
- Geographic =
- Latitude_Resolution +
- Longitude_Resolution +
- Geographic_Coordinate_Units
- Planar =
- [Map_Projection |
- Grid_Coordinate_System |
- Local_Planar] +
- Planar_Coordinate_Information
- Map_Projection =
- Map_Projection_Name +
- [Albers_Conical_Equal_Area |
- Azimuthal_Equidistant |
- Equidistant_Conic |
- Equirectangular |
- General_Vertical_Near-sided_Perspective |
- Gnomonic |
- Lambert_Azimuthal_Equal_Area |
- Lambert_Conformal_Conic |
- Mercator |
- Modified_Stereographic_for_Alaska |
- Miller_Cylindrical |
- Oblique_Mercator |
- Orthographic |
- Polar_Stereographic |
- Polyconic |
- Robinson |
- Sinusoidal |
- Space_Oblique_Mercator_(Landsat) |
- Stereographic |
- Transverse Mercator |
- van_der_Grinten |
- Map_Projection_Parameters]
- Albers_Conical_Equal_Area =
- 1{Standard_Parallel}2 +
- Longitude_of_Central_Meridian +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- Azimuthal_Equidistant =
- Longitude_of_Central_Meridian +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- Equidistant_Conic =
- 1{Standard_Parallel}2 +
- Longitude_of_Central_Meridian +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- Equirectangular =
- Standard_Parallel +
- Longitude_of_Central_Meridian +
- False_Easting +
- False_Northing
- General_Vertical_Near-sided_Perspective =
- Height_of_Perspective_Point_Above_Surface +
- Longitude_of_Projection_Center +
- Latitude_of_Projection_Center +
- False_Easting +
- False_Northing
- Gnomonic =
- Longitude_of_Projection_Center +
- Latitude_of_Projection_Center +
- False_Easting +
- False_Northing
- Lambert_Azimuthal_Equal_Area =
- Longitude_of_Projection_Center +
- Latitude_of_Projection_Center +
- False_Easting +
- False_Northing
- Lambert_Conformal_Conic =
- 1{Standard_Parallel}2 +
- Longitude_of_Central_Meridian +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- Mercator =
- [Standard_Parallel |
- Scale_Factor_at_Equator] +
- Longitude_of_Central_Meridian +
- False_Easting +
- False_Northing
- Modified_Stereographic_for_Alaska =
- False_Easting +
- False_Northing
- Miller_Cylindrical =
- Longitude_of_Central_Meridian +
- False_Easting +
- False_Northing
- Oblique_Mercator =
- Scale_Factor_at_Center_Line +
- [Oblique_Line_Azimuth |
- Oblique_Line_Point] +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- Oblique_Line_Azimuth =
- Azimuthal_Angle +
- Azimuth_Measure_Point_Longitude
- Oblique_Line_Point =
- 2{Oblique_Line_Latitude +
- Oblique_Line_Longitude}2
- Orthographic =
- Longitude_of_Projection_Center +
- Latitude_of_Projection_Center +
- False_Easting +
- False_Northing
- Polar_Stereographic =
- Straight-Vertical_Longitude_from_Pole +
- [Standard_Parallel |
- Scale_Factor_at_Projection_Origin] +
- False_Easting +
- False_Northing
- Polyconic =
- Longitude_of_Central_Meridian +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- Robinson =
- Longitude_of_Projection_Center +
- False_Easting +
- False_Northing
- Sinusoidal =
- Longitude_of_Central_Meridian +
- False_Easting +
- False_Northing
- Space_Oblique_Mercator_(Landsat) =
- Landsat_Number +
- Path_Number +
- False_Easting +
- False_Northing
- Stereographic =
- Longitude_of_Projection_Center +
- Latitude_of_Projection_Center +
- False_Easting +
- False_Northing
- Transverse_Mercator =
- Scale_Factor_at_Central_Meridian +
- Longitude_of_Central_Meridian +
- Latitude_of_Projection_Origin +
- False_Easting +
- False_Northing
- van_der_Grinten =
- Longitude_of_Central_Meridian +
- False_Easting +
- False_Northing
- Map_Projection_Parameters =
- Appropriate data elements 4.1.2.1.23.1 through 4.1.2.1.23.18 to
- document the map projection parameters.
- Grid_Coordinate_System =
- Grid_Coordinate_System_Name +
- [Universal_Transverse_Mercator |
- Universal_Polar_Stereographic |
- State_Plane_Coordinate_System |
- ARC_Coordinate_System |
- Other_Grid_System's_Definition]
- Universal_Transverse_Mercator =
- UTM_Zone_Number +
- Transverse_Mercator
- Universal_Polar_Stereographic =
- UPS_Zone_Identifier +
- Polar_Stereographic
- State_Plane_Coordinate_System =
- SPCS_Zone_Identifier +
- [Lambert_Conformal_Conic |
- Transverse_Mercator |
- Oblique_Mercator |
- Polyconic]
- ARC_Coordinate_System =
- ARC_System_Zone_Identifier +
- [Equirectangular |
- Azimuthal_Equidistant]
- Local_Planar =
- Local_Planar_Description +
- Local_Planar_Georeference_Information
- Planar_Coordinate_Information =
- Planar_Coordinate_Encoding_Method +
- [Coordinate_Representation |
- Distance_and_Bearing_Representation] +
- Planar_Distance_Units
- Coordinate_Representation =
- Abscissa_Resolution +
- Ordinate_Resolution
- Distance_and_Bearing_Representation =
- Distance_Resolution +
- Bearing_Resolution +
- Bearing_Units +
- Bearing_Reference_Direction +
- Bearing_Reference_Meridian
- Local =
- Local_Description +
- Local_Georeference_Information
- Geodetic_Model =
- 0{Horizontal_Datum_Name}1 +
- Ellipsoid_Name +
- Semi-major_Axis +
- Denominator_of_Flattening_Ratio
- Vertical_Coordinate_System_Definition =
- 0{Altitude_System_Definition}1 +
- 0{Depth_System_Definition}1
- Altitude_System_Definition =
- Altitude_Datum_Name +
- 1{Altitude_Resolution}n +
- Altitude_Distance_Units +
- Altitude_Encoding_Method
- Depth_System_Definition =
- Depth_Datum_Name +
- 1{Depth_Resolution}n +
- Depth_Distance_Units +
- Depth_Encoding_Method
- 4.1 Horizontal Coordinate System
Definition -- the reference frame or system from which linear or angular
quantities are measured and assigned to the position that a point occupies.
- Type: compound
- Short Name: horizsys
- 4.1.1 Geographic -- the quantities of
latitude and longitude which define the position of a point on the Earth's surface
with respect to a reference spheroid.
- Type: compound
-
Short Name: geograph
- 4.1.1.1 Latitude
Resolution -- the minimum difference between two adjacent latitude values
expressed in Geographic Coordinate Units of measure.
- Type: real
- Domain: Latitude Resolution > 0.0
- Short Name: latres
- 4.1.1.2 Longitude
Resolution -- the minimum difference between two adjacent longitude values
expressed in Geographic Coordinate Units of measure.
- Type: real
- Domain: Longitude Resolution > 0.0
- Short Name: longres
- 4.1.1.3 Geographic Coordinate Units -- units of
measure used for the latitude and longitude values.
- Type: text
- Domain: "Decimal degrees" "Decimal minutes" "Decimal seconds" "Degrees and
decimal minutes" "Degrees, minutes, and decimal seconds" "Radians" "Grads"
- Short Name: geogunit
- 4.1.2 Planar -- the quantities of distances,
or distances and angles, which define the position of a point on a reference plane
to which the surface of the Earth has been projected.
- Type: compound
-
Short Name: planar
- 4.1.2.1 Map Projection --
the systematic representation of all or part of the surface of the Earth on a
plane or developable surface.
- Type: compound
-
Short Name: mapproj
- 4.1.2.1.1 Map
Projection Name -- name of the map projection.
- Type: text
- Domain: Albers Conical Equal Area" "Azimuthal Equidistant" "Equidistant
Conic" "Equirectangular" "General Vertical Near-sided Projection"
"Gnomonic" "Lambert Azimuthal Equal Area" "Lambert Conformal Conic"
"Mercator" "Modified Stereographic for Alaska" "Miller Cylindrical"
"Oblique Mercator" "Orthographic" "Polar Stereographic" "Polyconic"
"Robinson" "Sinusoidal" "Space Oblique Mercator" "Stereographic"
"Transverse Mercator" "van der Grinten" free text
- Short Name: mapprojn
- 4.1.2.1.2 Albers Conical Equal Area -- contains
parameters for the Albers Conical Equal Area projection.
- Type: compound
- Short Name: albers
- 4.1.2.1.3 Azimuthal Equidistant -- contains
parameters for the Azimuthal Equidistant projection.
- Type: compound
- Short Name:azimequi
- 4.1.2.1.4 Equidistant Conic -- contains parameters for
the Equidistant Conic projection.
- Type: compound
- Short Name: equicon
- 4.1.2.1.5 Equirectangular -- contains parameters for the
Equirectangular projection.
- Type: compound
- Short Name: equirect
- 4.1.2.1.6 General Vertical Near-sided
Perspective -- contains parameters for the General Vertical Near-sided
Perspective projection.
- Type: compound
- Short Name: gvnsp
- 4.1.2.1.7 Gnomonic -- contains
parameters for the Gnomonic projection.
- Type: compound
- Short Name: gnomonic
- 4.1.2.1.8 Lambert Azimuthal Equal Area --
contains parameters for the Lambert Azimuthal Equal Area projection.
- Type: compound
- Short Name: lamberta
- 4.1.2.1.9 Lambert Conformal Conic -- contains
parameters for the Lambert Conformal Conic projection.
- Type: compound
- Short Name:lambertc
- 4.1.2.1.10 Mercator -- contains
parameters for the Mercator projection
- Type: compound
- Short Name: mercator
- 4.1.2.1.11 Modified Stereographic for
Alaska -- contains parameters for the Modified Stereographic for Alaska
projection.
- Type: compound
- Short Name: modsak
- 4.1.2.1.12 Miller
Cylindrical -- contains parameters for the Miller Cylindrical
projection.
- Type: compound
- Short Name: miller
- 4.1.2.1.13 Oblique
Mercator -- contains parameters for the Oblique Mercator
projection.
- Type: compound
- Short Name: obqmerc
- 4.1.2.1.14 Orthographic --
contains parameters for the Orthographic projection.
- Type: compound
- Short Name:orthogr
- 4.1.2.1.15 Polar
Stereographic -- contains parameters for the Polar Stereographic
projection.
- Type: compound
- Short Name:polarst
- 4.1.2.1.16 Polyconic -- contains
parameters for the Polyconic projection.
- Type: compound
- Short Name:polycon
- 4.1.2.1.17 Robinson -- contains
parameters for the Robinson projection.
- Type: compound
- Short Name: robinson
- 4.1.2.1.18 Sinusoidal --
contains parameters for the Sinusoidal projection.
- Type: compound
- Short Name: sinusoid
- 4.1.2.1.19 Space Oblique Mercator
(Landsat) -- contains parameters for the Space Oblique Mercator
(Landsat) projection.
- Type: compound
- Short Name: spaceobq
- 4.1.2.1.20 Stereographic
-- contains parameters for the Stereographic projection.
- Type: compound
- Short Name: stereo
- 4.1.2.1.21 Transverse Mercator -- contains parameters
for theTransverse mercator projection.
- Type: compound
- Short Name: transmer
- 4.1.2.1.22 van der
Grinten -- contains parameters for the van der Grinten projection.
- Type: compound
- Short Name: vdgrin
- 4.1.2.1.23 Map Projection Parameters -- a
complete parameter set of the projection that was used for the data set.
The information provided shall include the names of the parameters and
values used for the data set that describe the mathematical relationship
between the Earth and the plane or developable surface for the
projection.
-
Type: compound
- 4.1.2.1.23.1 Standard Parallel -- line of constant
latitude at which the surface of the Earth and the plane or developable
surface intersect.
- Type: real
- Domain: -90.0 <= Standard Parallel <= 90.0
- Short Name: stdparll
- 4.1.2.1.23.2 Longitude of Central Meridian
-- the line of longitude at the center of a map projection generally
used as the basis for constructing the projection.
- Type: real
- Domain: -180.0 <= Longitude of Central Meridian < 180.0
- Short Name: longcm
- 4.1.2.1.23.3 Latitude of Projection Origin
-- latitude chosen as the origin of rectangular coordinates for a map
projection.
- Type: real
- Domain: -90.0 <= Latitude of Projection Origin <= 90.0
- Short Name: latprjo
- 4.1.2.1.23.4 False
Easting -- the value added to all "x" values in the rectangular
coordinates for a map projection. This value frequently is assigned to
eliminate negative numbers. Expressed in the unit of measure identified
in Planar Coordinate Units.
- Type: real
- Domain: free real
- Short Name: feast
- 4.1.2.1.23.5 False
Northing -- the value added to all "y" values in the rectangular
coordinates for a map projection. This value frequently is assigned to
eliminate negative numbers. Expressed in the unit of measure identified
in Planar Coordinate Units.
- Type: real
- Domain: free real
- Short Name: fnorth
- 4.1.2.1.23.6 Scale Factor at Equator -- a
multiplier for reducing a distance obtained from a map by computation
or scaling to the actual distance along the equator.
- Type: real
- Domain: Scale Factor at Equator > 0.0
- Short Name: sfequat
- 4.1.2.1.23.7 Height of Perspective
Point Above Surface -- height of viewpoint above the Earth,
expressed in meters.
- Type: real
- Domain: Height of Perspective Point Above Surface > 0.0
- Short Name: heightpt
- 4.1.2.1.23.8 Longitude of Projection
Center -- longitude of the point of projection for azimuthal
projections.
- Type: real
- Domain: -180.0 <= Longitude of Projection Center < 180.0
- Short Name: longpc
- 4.1.2.1.23.9 Latitude of Projection Center
-- latitude of the point of projection for azimuthal projections.
- Type: real
- Domain: -90.0 <= Latitude of Projection Center <= 90.0
- Short Name: latprjc
- 4.1.2.1.23.10 Scale Factor at Center Line -- a
multiplier for reducing a distance obtained from a map by computation
or scaling to the actual distance along the center line.
- Type: real
- Domain: Scale Factor at Center Line > 0.0
- Short Name: sfctrlin
- 4.1.2.1.23.11 Oblique Line Azimuth -- method used to
describe the line along which an oblique mercator map projection is
centered using the map projection origin and an azimuth.
- Type: compound
-
Short Name: obqlazim
- 4.1.2.1.23.11.1 Azimuthal Angle -- angle measured
clockwise from north, and expressed in degrees.
- Type: real
- Domain: 0.0 <= Azimuthal Angle < 360.0
- Short Name: azimangl
- 4.1.2.1.23.11.2 Azimuth Measure Point
Longitude -- longitude of the map projection origin.
- Type: real
- Domain: -180.0 <= Azimuth Measure Point Longitude <
180.0
- Short Name: azimptl
- 4.1.2.1.23.12 Oblique Line Point -- method used to
describe the line along which an oblique mercator map projection is
centered using two points near the limits of the mapped region that
define the center line.
- Type: compound
-
Short Name: obqlpt
- 4.1.2.1.23.12.1 Oblique Line Latitude -- latitude
of a point defining the oblique line.
- Type: real
- Domain: -90.0 <= Oblique Line Latitude <= 90.0
- Short Name: obqllat
- 4.1.2.1.23.12.2 Oblique Line Longitude --
longitude of a point defining the oblique line.
- Type: real
- Domain: -180.0 <= Oblique Line Longitude < 180.0
- Short Name: obqllong
- 4.1.2.1.23.13 Straight Vertical
Longitude from Pole -- longitude to be oriented straight up from
the North or South Pole.
- Type: real
- Domain: -180.0 <= Straight Vertical Longitude from Pole <
180.0
- Short Name: svlong
- 4.1.2.1.23.14 Scale Factor at Projection
Origin -- a multiplier for reducing a distance obtained from a map
by computation or scaling to the actual distance at the projection
origin.
- Type: real
- Domain: Scale Factor at Projection Origin > 0.0
- Short Name: sfprjorg
- 4.1.2.1.23.15 Landsat
Number -- number of the Landsat satellite. (Note: This data element
exists solely to provide a parameter needed to define the space oblique
mercator projection. It is not used to identify data originating from a
remote sensing vehicle.)
- Type: Integer
- Domain: free integer
- Short Name: landsat
- 4.1.2.1.23.16 Path
Number -- number of the orbit of the Landsat satellite. (Note: This
data element exists solely to provide a parameter needed to define the
space oblique mercator projection. It is not used to identify data
originating from a remote sensing vehicle.)
- Type: integer
- Domain: 0 < Path Number < 251 for Landsats 1, 2, or 3 0 <
Path Number < 233 for Landsats 4 or 5, free integer
- Short Name: pathnum
- 4.1.2.1.23.17 Scale Factor at Central
Meridian -- a multiplier for reducing a distance obtained from a
map by computation or scaling to the actual distance along the central
meridian.
- Type: real
- Domain: Scale Factor at Central Meridian > 0.0
- Short Name: sfctrmer
- 4.1.2.1.23.18 Other Projection's Definition
-- a description of a projection, not defined elsewhere in the
standard, that was used for the data set. The information provided
shall include the name of the projection, names of parameters and
values used for the data set, and the citation of the specification for
the algorithms that describe the mathematical relationship between
Earth and plane or developable surface for the projection.
- Type: text
- Domain: free text
- 4.1.2.2 Grid
Coordinate System -- a plane-rectangular coordinate system usually based
on, and mathematically adjusted to, a map projection so that geographic
positions can be readily transformed to and from plane coordinates.
- Type: compound
-
Short Name gridsys
- 4.1.2.2.1 Grid Coordinate System Name -- name
of the grid coordinate system.
- Type: text
- Domain: "Universal Transverse Mercator" "Universal Polar Stereographic"
"State Plane Coordinate System 1927" "State Plane Coordinate System 1983"
"ARC Coordinate System" "other grid system"
- Short Name: gridsysn
- 4.1.2.2.2 Universal Transverse Mercator
(UTM) -- a grid system based on the transverse mercator projection,
applied between latitudes 84 degrees north and 80 degrees south on the
Earth's surface.
- Type: compound
-
Short Name: utm
- 4.1.2.2.2.1 UTM Zone
Number -- identifier for the UTM zone.
- Type: integer
- Domain: 1 <= UTM Zone Number <= 60 for the northern
hemisphere; -60 <= UTM Zone Number <= -1 for the southern
hemisphere
- Short Name: utmzone
- 4.1.2.2.3 Universal Polar Stereographic
(UPS) -- a grid system based on the polar stereographic projection,
applied to the Earth's polar regions north of 84 degrees north and south of
80 degrees south.
- Type: compound
-
Short Name: ups
- 4.1.2.2.3.1 UPS Zone Identifier -- identifier for
the UPS zone.
- Type: text
- Domain: "A" "B" "Y" "Z"
- Short Name: upszone
- 4.1.2.2.4 State Plane Coordinate System
(SPCS) -- a plane-rectangular coordinate system established for each
state in the United States by the National Geodetic Survey.
- Type: compound
-
Short Name: spcs
- 4.1.2.2.4.1 SPCS Zone Identifier -- identifier for
the SPCS zone.
- Type: text
- Domain: Four-digit numeric codes for the State Plane Coordinate
Systems based on the North American Datum of 1927 are found in
Department of Commerce, 1986, Representation of geographic point
locations for information interchange (Federal Information Processing
Standard 70-1): Washington: Department of Commerce, National Institute
of Standards and Technology. Codes for the State Plane Coordinate
Systems based on the North American Datum of 1983 are found in
Department of Commerce, 1989 (January), State Plane Coordinate System
of 1983 (National Oceanic and Atmospheric Administration Manual NOS NGS
5): Silver Spring, Maryland, National Oceanic and Atmospheric
Administration, National Ocean Service, Coast and Geodetic Survey.
- Short Name: spcszone
- 4.1.2.2.5 ARC Coordinate System -- the Equal
Arc-second Coordinate System, a plane- rectangular coordinate system
established in Department of Defense, 1990, Military specification ARC
Digitized Raster Graphics (ADRG) (MIL-A-89007): Philadelphia, Department of
Defense, Defense Printing Service Detachment Office.
- Type: compound
-
Short Name: arcsys
- 4.1.2.2.5.1 ARC System Zone Identifier --
identifier for the ARC Coordinate System Zone.
- Type: integer
- Domain: 1 <= ARC System Zone Identifier <= 18
- Short Name: arczone
- 4.1.2.2.6 Other Grid System's Definition --
a complete description of a grid system, not defined elsewhere in this
standard, that was used for the data set. The information provided shall
include the name of the grid system, the names of the parameters and values
used for the data set, and the citation of the specification for the
algorithms that describe the mathematical relationship between the Earth
and the coordinates of the grid system.
- Type: text
- Domain: free text
- Short Name: othergrd
- 4.1.2.3 Local Planar -- any
right-handed planar coordinate system of which the z-axis coincides with a
plumb line through the origin that locally is aligned with the surface of the
Earth.
- Type: compound
-
Short Name: localp
- 4.1.2.3.1 Local Planar Description -- a
description of the local planar system.
- Type: text
- Domain: free text
- Short Name: localpd
- 4.1.2.3.2 Local Planar Georeference
Information -- a description of the information provided to register
the local planar system to the Earth (e.g. control points, satellite
ephemeral data, inertial navigation data).
- Type: text
- Domain: free text
- Short Name: localpgi
- 4.1.2.4 Planar Coordinate Information --
information about the coordinate system developed on the planar surface.
- Type: compound
-
Short Name: planci
- 4.1.2.4.1 Planar Coordinate Encoding
Method -- the means used to represent horizontal positions.
- Type: text
- Domain: "coordinate pair" "distance and bearing" "row and column"
- Short Name: plance
- 4.1.2.4.2 Coordinate Representation -- the
method of encoding the position of a point by measuring its distance from
perpendicular reference axes (the "coordinate pair" and "row and column"
methods).
- Type: compound
-
Short Name: coordrep
- 4.1.2.4.2.1 Abscissa Resolution -- the (nominal)
minimum distance between the "x" or column values of two adjacent
points, expressed in Planar Distance Units of measure.
- Type: real
- Domain: Abscissa Resolution > 0.0
- Short Name: absres
- 4.1.2.4.2.2 Ordinate Resolution -- the (nominal)
minimum distance between the "y" or row values of two adjacent points,
expressed in Planar Distance Units of measure.
- Type: real
- Domain: Ordinate Resolution > 0.0
- Short Name: ordres
- 4.1.2.4.3 Distance and Bearing
Representation -- a method of encoding the position of a point by
measuring its distance and direction (azimuth angle) from another
point.
- Type: compound
-
Short Name: distbrep
- 4.1.2.4.3.1 Distance Resolution -- the minimum
distance measurable between two points, expressed Planar Distance Units
of measure.
- Type: real
- Domain: Distance Resolution > 0.0
- Short Name: distres
- 4.1.2.4.3.2 Bearing Resolution -- the minimum angle
measurable between two points, expressed in Bearing Units of
measure.
- Type: real
- Domain: Bearing Resolution > 0.0
- Short Name: bearres
- 4.1.2.4.3.3 Bearing
Units -- units of measure used for angles.
- Type: text
- Domain: "Decimal degrees" "Decimal minutes" "Decimal seconds"
"Degrees and decimal minutes" "Degrees, minutes, and decimal seconds"
"Radians" "Grads"
- Short Name: bearunit
- 4.1.2.4.3.4 Bearing Reference Direction --
direction from which the bearing is measured.
- Type: text
- Domain: "North" "South"
- Short Name: bearrefd
- 4.1.2.4.3.5 Bearing Reference Meridian --
axis from which the bearing is measured.
- Type: text
- Domain: "Assumed" "Grid" "Magnetic" "Astronomic" "Geodetic"
- Short Name: bearrefm
- 4.1.2.4.4 Planar Distance Units -- units of measure
used for distances.
- Type: text
- Domain: "meters" "international feet" "survey feet" free text
- Short Name: plandu
- 4.1.3 Local -- a description of any coordinate
system that is not aligned with the surface of the Earth.
- Type: compound
-
Short Name: local
- 4.1.3.1 Local
Description -- a description of the coordinate system and its orientation
to the surface of the Earth.
- Type: text
- Domain: free text
- Short Name: localdes
- 4.1.3.2 Local Georeference Information -- a
description of the information provided to register the local system to the
Earth (e.g. control points, satellite ephemeral data, inertial navigation
data).
- Type: text
- Domain: free text
- Short Name: localgeo
- 4.1.4 Geodetic Model --
parameters for the shape of the earth.
- Type: compound
-
Short Name: geodetic
- 4.1.4.1 Horizontal Datum Name -- the identification
given to the reference system used for defining the coordinates of points.
- Type: text
- Domain: "North American Datum of 1927" "North American Datum of 1983" free
text
- Short Name: horizdn
- 4.1.4.2 Ellipsoid Name --
identification given to established representations of the Earth's shape.
- Type: text
- Domain: "Clarke 1866" "Geodetic Reference System 80" free text
- Short Name: ellips
- 4.1.4.3 Semi-major Axis
-- radius of the equatorial axis of the ellipsoid.
- Type: real
- Domain: Semi-major Axis > 0.0
- Short Name: semiaxis
- 4.1.4.4 Denominator of Flattening Ratio --
the denominator of the ratio of the difference between the equatorial and polar
radii of the ellipsoid when the numerator is set to 1.
- Type: real
- Domain: Denominator of Flattening > 0.0
- Short Name: denflat
- 4.2 Vertical Coordinate System
Definition -- the reference frame or system from which vertical distances
(altitudes or depths) are measured.
- Type: compound
- Short Name: vertdef
- 4.2.1 Altitude System Definition -- the reference
frame or system from which altitudes (elevations) are measured. The term
"altitude"' is used instead of the common term "elevation" to conform to the
terminology in Federal Information Processing Standards 70-1 and 173.
- Type: compound
-
Short Name: altsys
- 4.2.1.1 Altitude
Datum Name -- the identification given to the surface taken as the surface
of reference from which altitudes are measured.
- Type: text
- Domain: "National Geodetic Vertical Datum of 1929" "North American Vertical
Datum of 1988" free text
- Short Name: altdatum
- 4.2.1.2 Altitude
Resolution -- the minimum distance possible between two adjacent altitude
values, expressed in Altitude Distance Units of measure.
- Type: real
- Domain: Altitude Resolution > 0.0
- Short Name: altres
- 4.2.1.3 Altitude Distance Units -- units in which
altitudes are recorded.
- Type: text
- Domain: "meters" "feet" free text
- Short Name: altunits
- 4.2.1.4 Altitude Encoding Method -- the means used
to encode the altitudes.
- Type: text
- Domain: "Explicit elevation coordinate included with horizontal
coordinates" "Implicit coordinate" "Attribute values"
- Short Name: altenc
- 4.2.2 Depth
System Definition -- the reference frame or system from which depths are
measured.
- Type: compound
-
Short Name: depthsys
- 4.2.2.1 Depth Datum
Name -- the identification given to surface of reference from which depths
are measured.
- Type: text
- Domain: "Local surface" "Chart datum; datum for sounding reduction" "Lowest
astronomical tide" "Highest astronomical tide" "Mean low water" "Mean high
water" "Mean sea level" "Land survey datum" "Mean low water springs" "Mean high
water springs" "Mean low water neap" "Mean high water neap" "Mean lower low
water" "Mean lower low water springs" "Mean higher high water" "Mean higher low
water" "Mean lower high water" "Spring tide" "Tropic lower low water" "Neap
tide" "High water" "Higher high water" "Low water" "Low-water datum" "Lowest
low water" "Lower low water" "Lowest normal low water" "Mean tide level"
"Indian spring low water" "High-water full and charge" "Low-water full and
charge" "Columbia River datum" "Gulf Coast low water datum" "Equatorial springs
low water" "Approximate lowest astronomical tide" "No correction" free
text
- Short Name: depthdn
- 4.2.2.2 Depth
Resolution -- the minimum distance possible between two adjacent depth
values, expressed in Depth Distance Units of measure.
- Type: real
- Domain: Depth Resolution > 0.0
- Short Name: depthres
- 4.2.2.3 Depth
Distance Units -- units in which depths are recorded.
- Type: text
- Domain: "meters" "feet" free text
- Short Name: depthdu
- 4.2.2.4 Depth
Encoding Method -- the means used to encode depths.
- Type: text
- Domain: "Explicit depth coordinate included with horizontal coordinates"
"Implicit coordinate" "Attribute values"
- Short Name: depthem
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