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AST Attribute Descriptions

Subsections

Abbrev(axis) - Abbreviate leading fields within numerical axis labels?
Adaptive - Should the area adapt to changes in the coordinate system?
AlignOffset - Align SkyFrames using the offset coordinate system?
AlignSideBand - Should the SideBand attribute be taken into account when aligning this DSBSpecFrame with another DSBSpecFrame?
AlignSpecOffset - Align SpecFrames using the offset coordinate system?
AlignStdOfRest - Standard of rest to use when aligning SpecFrames
AlignSystem - Coordinate system in which to align the Frame
AlignTimeScale - Time scale to use when aligning TimeFrames
AllWarnings - A list of all currently available condition names
AsTime(axis) - Format celestal coordinates as times?
Base - FrameSet base Frame index
Border - Draw a border around valid regions of a Plot?
Bottom(axis) - Lowest axis value to display
Bounded - Is the Region bounded?
CDMatrix - Use CDi_j keywords to represent pixel scaling, rotation, etc?
CarLin - Ignore spherical rotations on CAR projections?
Card - Index of current FITS card in a FitsChan
CardType - The data type of the current card in a FitsChan
Class - Object class name
Clean - Remove cards used whilst reading even if an error occurs?
Clip - Clip lines and/or markers at the Plot boundary?
ClipOp - Combine Plot clipping limits using a boolean OR?
Closed - Should the boundary be considered to be inside the region?
Colour(element) - Colour index for a Plot element
ColumnLenC(column) - The largest string length of any value in a column
ColumnLength(column) - The number of elements in each value in a column
ColumnNdim(column) - The number of axes spanned by each value in a column
ColumnType(column) - The data type of each value in a column
Comment - Include textual comments in output?
Current - FrameSet current Frame index
DSBCentre - The central position of interest in a dual sideband spectrum
DefB1950 - Use FK4 B1950 as defaults?
Digits/Digits(axis) - Number of digits of precision
Direction(axis) - Display axis in conventional direction?
Disco - PcdMap pincushion/barrel distortion coefficient
Domain - Coordinate system domain
DrawAxes(axis) - Draw axes for a Plot?
DrawTitle - Draw a title for a Plot?
Dut1 - The UT1-UTC correction
Edge(axis) - Which edges to label in a Plot
Encoding - System for encoding Objects as FITS headers
Epoch - Epoch of observation
Equinox - Epoch of the mean equinox
Escape - Allow changes of character attributes within strings?
FillFactor - Fraction of the Region which is of interest
FitsDigits - Digits of precision for floating point FITS values
Font(element) - Character font for a Plot element
Format(axis) - Format specification for axis values
Full - Set level of output detail
Gap(axis) - Interval between linearly spaced major axis values of a Plot
Grf - Use Grf functions registered through astGrfSet?
Grid - Draw grid lines for a Plot?
GrismAlpha - The angle of incidence of the incoming light on the grating surface
GrismEps - The angle between the normal and the dispersion plane
GrismG - The grating ruling density
GrismM - The interference order
GrismNR - The refractive index at the reference wavelength
GrismNRP - The rate of change of refractive index with wavelength
GrismTheta - Angle between normal to detector plane and reference ray
GrismWaveR - The reference wavelength
ID - Object identification string
IF - The intermediate frequency in a dual sideband spectrum
Ident - Permanent Object identification string
ImagFreq - The image sideband equivalent of the rest frequency
Indent - Specifies the indentation to use in text produced by a Channel
IntraFlag - IntraMap identification string
Invert - Mapping inversion flag
Invisible - Draw graphics using invisible ink?
IsLatAxis(axis) - Is the specified celestial axis a latitude axis?
IsLinear - Is the Mapping linear?
IsLonAxis(axis) - Is the specified celestial axis a longitude axis?
IsSimple - Has the Mapping been simplified?
IterInverse - Provide an iterative inverse transformation?
Iwc - Include a Frame representing FITS-WCS intermediate world coordinates?
KeyCase - Are keys case sensitive?
KeyError - Report an error when getting the value of a non-existant KeyMap entry?
LTOffset - The offset from UTC to Local Time, in hours
Label(axis) - Axis label
LabelAt(axis) - Where to place numerical labels for a Plot
LabelUnits(axis) - Use axis unit descriptions in a Plot?
LabelUp(axis) - Draw numerical Plot labels upright?
Labelling - Label and tick placement option for a Plot
LatAxis - Index of the latitude axis
ListSize - Number of points in a PointList
LogGap(axis) - Interval between major axis values of a Plot
LogLabel(axis) - Use exponential format for numerical axis labels?
LogPlot(axis) - Map the plot logarithmically onto the screen?
LogTicks(axis) - Space the major tick marks logarithmically?
LonAxis - Index of the longitude axis
LutInterp - Look-up table interpolation method
MajTickLen(axis) - Length of major tick marks for a Plot
MapLocked - Prevent new entries being added to a KeyMap?
MatchEnd - Match trailing axes?
MaxAxes - Maximum number of Frame axes to match
MeshSize - Number of points used to represent the boundary of a Region
MinAxes - Minimum number of Frame axes to match
MinTick(axis) - Density of minor tick marks for a Plot
MinTickLen(axis) - Length of minor tick marks for a Plot
NatLat - Native latitude of the reference point of a FITS-WCS projection
NatLon - Native longitude of the reference point of a FITS-WCS projection
Naxes - Number of Frame axes
Ncard - Number of FITS header cards in a FitsChan
Ncolumn - The number of columns in the table
NegLon - Display negative longitude values?
Negated - Region negation flag
Nframe - Number of Frames in a FrameSet
Nin - Number of input coordinates for a Mapping
NiterInverse - Maximum number of iterations for the iterative inverse transformation
Nkey - Number of unique FITS keywords in a FitsChan
Nobject - Number of Objects in class
Norm(axis) - Specifies the plane upon which a Plot3D draws text and markers
NormUnit(axis) - Normalised Axis physical units
Nout - Number of output coordinates for a Mapping
Nparameter - The number of global parameters in the table
Nrow - The number of rows in the table
NumLab(axis) - Draw numerical axis labels for a Plot?
NumLabGap(axis) - Spacing of numerical labels for a Plot
ObjSize - The in-memory size of the Object
ObsAlt - The geodetic altitude of the observer
ObsLat - The geodetic latitude of the observer
ObsLon - The geodetic longitude of the observer
PVMax(i) - Maximum number of FITS-WCS projection parameters
PVi_m - FITS-WCS projection parameters
PcdCen(axis) - Centre coordinates of pincushion/barrel distortion
Permute - Permute axis order?
PolarLong - The longitude value to assign to either pole
PolyTan - Use PVi_m keywords to define distorted TAN projection?
PreserveAxes - Preserve axes?
ProjP(m) - FITS-WCS projection parameters
Projection - Sky projection description
RefCount - Count of active Object pointers
RefDec - The declination of the reference point
RefRA - The right ascension of the reference point
RegionClass - The AST class name of the Region encapsulated within an Stc
Report - Report transformed coordinates?
ReportLevel - Determines which read/write conditions are reported
RestFreq - The rest frequency
RootCorner - Specifies which edges of the 3D box should be annotated
Seed - Random number seed for a MathMap
SideBand - Indicates which sideband a dual sideband spectrum represents
SimpFI - Forward-inverse MathMap pairs simplify?
SimpIF - Inverse-forward MathMap pairs simplify?
SinkFile - Output file to which to data should be written
Size(element) - Character size for a Plot element
SizeGuess - The expected size of the KeyMap
Skip - Skip irrelevant data?
SkyRef(axis) - Position defining the offset coordinate system
SkyRefIs - Selects the nature of the offset coordinate system
SkyRefP(axis) - Position on primary meridian of offset coordinate system
SortBy - Determines how keys are sorted in a KeyMap
SourceFile - Input file from which to read data
SourceSys - Spectral system in which the source velocity is stored
SourceVRF - Rest frame in which the source velocity is stored
SourceVel - The source velocity
SpecOrigin - The zero point for SpecFrame axis values
SpecVal - The spectral position at which flux values are measured
StcsArea - Return the CoordinateArea component when reading an STC-S document?
StcsCoords - Return the Coordinates component when reading an STC-S document?
StcsLength - Controls output line length
StcsProps - Return all properties when reading an STC-S document?
StdOfRest - Standard of rest
Strict - Report an error if any unexpeted data items are found?
Style(element) - Line style for a Plot element
Symbol(axis) - Axis symbol
System - Coordinate system used to describe positions within the domain
TabOK - Should the FITS-WCS -TAB algorithm be recognised?
TextLab(axis) - Draw descriptive axis labels for a Plot?
TextLabGap(axis) - Spacing of descriptive axis labels for a Plot
TickAll - Draw tick marks on all edges of a Plot?
TimeOrigin - The zero point for TimeFrame axis values
TimeScale - Time scale
Title - Frame title
TitleGap - Vertical spacing for a Plot title
Tol - Plotting tolerance
TolInverse - Target relative error for the iterative inverse transformation
Top(axis) - Highest axis value to display
TranForward - Forward transformation defined?
TranInverse - Inverse transformation defined?
Unit(axis) - Axis physical units
UnitRadius - SphMap input vectors lie on a unit sphere?
UseDefs - Use default values for unspecified attributes?
Warnings - Controls the issuing of warnings about various conditions
WcsAxis(lonlat) - FITS-WCS projection axes
WcsType - FITS-WCS projection type
Width(element) - Line width for a Plot element
XmlFormat - System for formatting Objects as XML
XmlLength - Controls output buffer length
XmlPrefix - The namespace prefix to use when writing
Zoom - ZoomMap scale factor

Next: Abbrev(axis) - Abbreviate leading fields within numerical axis labels?
Up: AST A Library for Handling World Coordinate Systems in Astronomy
Previous: astZoomMap - Create a ZoomMap

AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
7th December 2012
E-mail:starlink@jiscmail.ac.uk

Copyright (C) 2012 Science \& Technology Facilities Council