STRING-INP=(IN,GEOM) INP is the input dataset to be projected where: IN (REQUIRED) is the input dataset filename. GEOM (OPTIONAL) is an IBIS dataset which, if supplied, must contain a valid set of GEOMA parameters capable of transforming the input frame from image space (geometrically distorted) to object space (undistorted). Such a dataset can be produced by OLDGEOMA2IBIS, or RESLOCVO(Viking Orbiters 1 and 2) or RESLOC or FARENC(Voyager).
STRING-OUT=OUTIMAGE OUT is the output version of IN. Unless the NOGEOM parameter is specified (see NOGEOM Parameters write-up), it must be NL lines by NS samples, where NL and NS come from the size field, plus extra lines for labels.
INTEGER-SIZE=(1,1,NL,NS) SIZE is a standard VICAR size field with NL as the number of lines and NS as the number of samples.
INTEGER- NL is the number of lines in the output dataset.
INTEGER- NS is the number of samples in the output dataset.
STRING- PLANET is the target body name, 12 characters fully spelled out. This will determine the planet radii and the SPICE. THIS IS A PLANET DESCRIPTIVE PARAMETER.
KEYWORD-(Valid:'NOSEDR) 'NOSEDR requests for MAP3 to not read the project SEDR for pointing, trajectory, etc. data. The user must input all relevent information.
Specifies a DN threshold used only in interpolation mode. If, when interpolating a dn value in the input file, one or more of the four neighbors is less than or equal to DNTHRESH it will not be used in the interpolation. Several combinations of input dn values can occur. Cases: If 4 input neighbors are > dnthresh then interpolation is done. If 3 input neighbors are > dnthresh the fourth is extrapolated and then interpolation is done. If 2 input neighbors are > dnthresh the output pixel is determined from a linear weighting of the 2 good pixels. If 1 input neighbor is > dnthresh it is copied to the output. If all the input neighbors are <= dnthresh the output is determined from the nearest neighbor.
KEYWORD-(Valid:'NOINTERP) 'NOINTERP will suppress interpolation between input DN values. Use nearest neighbor to determine output DN.
KEYWORD-(Valid - 'NOGE) NOGEOM will suppress the fetch of LGEOM.
INTEGER-REFTIME=(N1,N2,N3,N4,N5,N6)
REFTIME is the reference time for the output projection.
Specifying REFTIME invokes the zonal differential flow correction (see
the ZVP keyword). REFTIME specifies the time of the output projection
to which the different input latitudes must be shifted using the
zonal flow model. To correctly mosaic images of a gas planet, all the
input images must be projected to the same reference time so that
the different latitudes match. Defaults to the same time as the input image
(no zonal correction).Format is 6 integers, Nn, in the order:
year day hour minute second millisecond.
Example: reftime=(92,88,56,2,33,0) in the same sense as the GLL sclk time
found in the picture label; ie: year 1992 day 88...
STRING- ZVP is the name of the zonal flow file used by map3. Only used if REFTIME is specified and if the default name is inappropriate.
KEYWORD-(Valid - 'SHORT) Applicable for Viking Orbiter 1 and 2 ONLY, 'SHORT indicates that the SEDR input is NOT the master Viking Orbiter SEDR. Instead it is a dataset containing a VICAR label and one other record of 2000 bytes containing one SEDR record. Such a dataset can be produced as an alternate output from VOLOG, the Orbiter logging program, or directly from a SEDR tape using VSAR. When a master SEDR file is in use, the DAS, FDS or FSC time is used to access the correct record in the file. If no corresponding entry appears in the dataset's directory, MAP3 abends. If SHORT is specified, the first non-label record is used and no check on FSC time is made.
KEYWORD-(Valid - 'NOLABEL) 'NOLABEL will suppress certain label updating activities of MAP3. This parameter does NOT allow MAP3 to run on non-VICAR datasets and does NOT suppress the addition of several logical label records which mathematically describe the output projection. The logging programs for the standard missions usually generate several label records containing the latitude and longitude of the four corners and center of the input frame. Normally, MAP3 updates these labels using the same camera pointing information it uses to project the picture. The updated values may differ from their old values, but still refer to the input frame, not the output. Mariner 10 labels did not contain these entries, so MAP3 creates them and fills them in. The primary use of NOLABEL was to suppress this activity for Mariner 10 frames in order to improve the picture to label size ratio on MASK'ed pictures.
KEYWORD-(Valid - 'HALF) 'HALF indicates that the input and output are halfword data.
KEYWORD-(Valid - 'BYTE) 'BYTE indicates that the input and output are byte data.
KEYWORD-(Valid - 'GEODET) 'GEODET indicates that CLAT and SLAT, entered by the user via the parameter list, are geodetic latitudes. They will be converted to geocentric before processing.
KEYWORD-(Valid - 'NAM2) 'NAM2 specifies that the north angle is to be measured as if it were the angle from up of the planet spin axis projected on the image, i.e., the MAP3 convention. The default is that the north angle is measured as if it were the angle from up of the planet spin axis projected on the image after the cameras have been slewed to place the optical axis coincident with the planet center. This is the SEDR convention.
KEYWORD-(Valid - 'MM71) 'MM71 forces the program to assume a Mariner 9 input frame, regardless of the picture label. The default is to obtain the project from the input image label. THIS IS A FLIGHT RELATED PARAMETER.
KEYWORD-(Valid - 'MVM73) 'MVM73 forces Mariner 10 processing, regardless of the picture label. The default is to obtain the project from the input image label. THIS IS A FLIGHT RELATED PARAMETER.
KEYWORD-(Valid - 'VI76) 'VI76 forces Viking Orbiter 1 and 2 processing, regardless of the picture label. The default is to obtain the project from the input image label. THIS IS A FLIGHT RELATED PARAMETER.
KEYWORD-(Valid - 'VGR1) 'VGR1 forces Voyager-1 processing, regardless of the picture label. The default is to obtain the project from the input image label. THIS IS A FLIGHT RELATED PARAMETER.
KEYWORD-(Valid - 'VGR2) 'VGR2 forces Voyager-2 processing, regardless of the picture label. The default is to obtain the project from the input image label. THIS IS A FLIGHT RELATED PARAMETER.
KEYWORD-(Valid - 'GLL) 'GLL forces Galileo processing, regardless of the picture label. The default is to obtain the project from the input image label. THIS IS A FLIGHT RELATED PARAMETER.
KEYWORD-(Valid - 'NOPROJEC) 'NOPROJEC forces non-flight processing. The default is to obtain the project from the input image label.
INTEGER-DAS=N1 Where N1 is an integer, DAS means the same as the FDS and FSC parameters. They are available for user convenience. N1 is the DAS(MM71), FDS(MVM73, Voyager), or FSC(Viking Orbiter) time of the input picture. It is necessary if data is to be obtained from a SEDR and is normally obtained from the picture label. THIS IS A FLIGHT RELATED PARAMETER.
INTEGER-FDS=N1 Where N1 is an integer, FDS means the same as the DAS and FSC parameters. They are available for user convenience. N1 is the DAS(MM71), FDS(MVM73, Voyager), or FSC(Viking Orbiter) time of the input picture. It is necessary if data is to be obtained from a SEDR and is normally obtained from the picture label. THIS IS A FLIGHT RELATED PARAMETER.
INTEGER-FSC=N1 Where N1 is an integer, FSC means the same as the FDS and DAS parameters. They are available for user convenience. N1 is the DAS(MM71), FDS(MVM73, Voyager), or FSC(Viking Orbiter) time of the input picture. It is necessary if data is to be obtained from a SEDR and is normally obtained from the picture label. THIS IS A FLIGHT RELATED PARAMETER.
REAL-RADII=(RA,RB,RC) RADII is the radii of the projected target. RA, RB, RC are reals and each specify the following: RA is the long equatorial radius (km). RB is the short equatorial radius (km). RC is the polar radius (km). THIS IS A PLANET DESCRIPTIVE PARAMETER.
REAL-LORA=R1 Where R1 is a real number, LORA is the longitude of RA (the long equatorial radius). This parameter is only meaningful when RA does NOT equal RB (the short equitorial radius) and even then the prime meridian is usually defined at RA. The default is LORA=0.0. THIS IS A PLANET DESCRIPTIVE PARAMETER.
REAL-CSCALE=R1 Where R1 is a real number, CSCALE is the number of pixels per millimeter on the focal plane once geometric distortion is removed. THIS IS A CAMERA DESCRIPTIVE PARAMETER.
REAL-FOCL=R2 Where R2 is a real number, FOCL is the camera focal length in millimeters. THIS IS A CAMERA DESCRIPTIVE PARAMETER.
REAL-CLINE=R3 Where R3 is a real number, CLINE is the line in an object space picture at which the optical axis intersects the image plane. Default non-standard flight pictures is NLI/2, where NLI is the number of lines in the input picture. THIS IS A CAMERA DESCRIPTIVE PARAMETER.
REAL-CSAMP=R4 Where R4 is a real number, CSAMP is the sample of the optical axis. Default for non-standard flight pictures is NSI/2, where NSI is the number of samples in the input frame. THIS IS A CAMERA DESCRIPTIVE PARAMETER.
INTEGER-CAMERA=N1 Where N1 is an integer, CAMERA is the number specifying which camera took the picture. It is normally obtained from the picture label, and is needed to obtain the correct CSCALE, FOCL, CLINE and CSAMP values if they are defaulted. N1 has the following meaning according to each flight. Mariner 9 and Mariner 10 N1 = 1 for A Camera N1 = 2 for B Camera Viking Orbiter N1 = 1 for Viking Orbiter 1, A Camera, S/N=7 N1 = 2 for Viking Orbiter 1, B Camera, S/N=4 N1 = 3 for Viking Orbiter 2, A Camera, S/N=8 N1 = 4 for Viking Orbiter 2, B Camera, S/N=6 N1 = 5 for Ground Test Camera, S/N=5 Voyager N1 = 1 for Voyager 1, Narrow Angle, S/N=7 N1 = 2 for Voyager 1, Wide Angle, S/N=6 N1 = 3 for Voyager 2, Narrow Angle, S/N=5 N1 = 4 for Voyager 2, Wide Angle, S/N=4 THIS IS A CAMERA DESCRIPTIVE PARAMETER.
KEYWORD-Valid:('DISTOR, 'IMAGE)
DISTOR tells MAP3 the input frame has NOT been corrected for vidicon
scene-dependent geometric distortion and causes a distortion correction
to be included as well as a map projection. Thus there is no need to GEOM
a frame twice to get a corrected map projection. DISTOR is superfluous if
a GEOM dataset is supplied, since its presence automatically induces the
correction. For MM71, MVM73, and Viking Orbiter, default "nominal" GEOMA
parameters are built into the program for each camera. If DISTOR is
specified and a GEOM dataset is not provided, the nominals for the
given camera are used. If neither DISTOR nor GEOM are given, the
input image label is read to determine if geometric correction has
been performed. THIS IS A CAMERA DESCRIPTIVE PARAMETER.
KEYWORD-Valid:('DISTOR,'IMAGE)
See DISTOR. IMAGE and DISTOR are synonyms.
KEYWORD-Valid:('OBJECT)
'OBJECT tells MAP3 that the input image is geometrically correct. OBJECT
overrides the information obtained from the input image label as to the
geometric state of the input image. OBJECT is the antonym of IMAGE
and DISTOR.
REAL-CMATRIX=(R1,R2,...,R9) Rn is a real number and specifies the C-matrix in row major order (C11, C12, C13, etc.). This matrix transforms camera coordinates to reference frame coordinates. The reference frame is the Earth Mean Equator 1950.0 System. (See Reference (3) for details.) THIS IS A VIEWING PARAMETER used in method 1.
REAL-MEMATRIX=(R10,R11,...,R18) Rn is a real number and specifies the ME matrix in row major order (C11,C12,C13,etc.). This matrix tranforms planet coordinates to reference frame coordinates. The reference frame is the Earth Mean Equator 1950.0 System. (See Reference (3) for details.) THIS IS A VIEWING PARAMETER used in method 1.
REAL-OMMATRIX=(R19,R20,...,R27) Rn is a real number and specifies the OM matrix in row major order (C11, C12, C13, etc.). This matrix transforms planet coordinates to camera coordinates. The reference frame is the Earth Mean Equator 1950.0 System. (See Reference (3) for details.) THIS IS A VIEWING PARAMETER.
REAL-VRVECTOR=(R28,R29,R30) Rn is a real number and specifies, in order, the X, Y, and Z components of the VR vector. This is the vector from the target body center to the spacecraft in reference frame coordinates. THIS IS A VIEWING PARAMETER.
REAL-RSVECTOR=(R31,R32,R33) Rn is a real number and specifies the RS vector. This is the vector from the target body center to the spacecraft in planet XYZ coordinates. THIS IS A VIEWING PARAMETER.
REAL-SLAT=R34 Where R34 is a real number, SLAT along with SLON and RMAG are the spherical target body coordinates of the RS vector. They are used to compute the RS vector if QUAM, FARENC or TIEPTS is specified. Default for standard flights is to obtain all three from the SEDR. SLAT is the subspacecraft latitude and SLON the subspacecraft longitude (west) in degrees. RMAG is the planet center to spacecraft range in kilometers. THIS IS A VIEWING PARAMETER used in method 1.
REAL-SLON=R35 Where R35 is a real number, SLON along with SLAT and RMAG are the spherical target body coordinates of the RS vector. They are used to compute the RS vector if QUAM, FARENC or TIEPTS is specified. Default for standard flights is to obtain all three from the SEDR. SLAT is the subspacecraft latitude and SLON the subspacecraft longitude (west) in degrees. RMAG is the planet center to spacecraft range in kilometers. THIS IS A VIEWING PARAMETER used in method 1.
REAL-RMAG=R36 Where R36 is a real number, RMAG along with SLAT and SLON are the spherical target body coordinates of the RS vector. They are used to compute the RS vector if QUAM, FARENC or TIEPTS is specified. Default for standard flights is to obtain all three from the SEDR. SLAT is the subspacecraft latitude and SLON the subspacecraft longitude (west) in degrees. RMAG is the planet center to spacecraft range in kilometers. THIS IS A VIEWING PARAMETER used in method 1.
INTEGER-TIME=(N1,N2,N3,N4,N5,N6) Where Nn is an integer, TIME is the time (GMT) at which the frame was taken. The Nn's specify, in order, the year, day, hour, minute, second, and millisecond of the middle (ideally) of the exposure. Default is to obtain this data from the SEDR if available. (The ME matrix is time dependent.) THIS IS A VIEWING PARAMETER.
REAL-RTAS=R1 Where R1 is a real number, RTAS is the right ascension (in degrees) of the target body's north celestial pole. Values for the inner five planets and the moon are built into the program. See Reference (1) for an illustration of the meaning of right ascension and declination. THIS IS A VIEWING PARAMETER.
REAL-DECLINAT=R2 Where R2 is a real number, DECLINAT is the declination in degrees of the target's north pole. Values for the inner five planets and the moon are built into the program. THIS IS A VIEWING PARAMETER.
KEYWORD-Valid:('QUAM)
'QUAM indicates the QUAM algorithm is to be used to obtain OM.
THIS IS A VIEWING PARAMETER.
REAL-CLAT=R4 Where R4 is a real number, CLAT is the latitude, in degrees, of the point at the center of the input image -- more precisely , at the intersection of the optical axis and the planet's surface. Default is to obtain CLAT from the SEDR. THIS IS A VIEWING PARAMETER . Used in QUAM algorithm.
REAL-CLON=R5 Where R5 is a real number, CLON is the west longitude, in degrees, of the above point. Default is to get CLON from the SEDR. THIS IS A VIEWING PARAMETER. Used in QUAM algorithm.
REAL-NORA=R6 Where R6 is a real number, NORA is the angle of north in degrees. It is used as a VIEWING PARAMETER in the QUAM algorithm and also in the FAR ENCOUNTER algorithm. In the QUAM algorithm, NORA is measured in the image plane, at the optical axis, clockwise from up. Default is to obtain NORA from the SEDR. The NORA in the SEDR differs slightly from the NORA actually desired. The error is a complicated function of the camera pointing and spacecraft position, but is not significant except for very oblique viewing angles or when quantitative accuracy for mosaicking is desired. NORA, as used in the FAR ENCOUNTER algorithm, is measured in the image plane at the subspacecraft point clockwise from up. Note the important difference in the definition of NORA in the QUAM and FAR ENCOUNTER algorithms. The default for NORA is the same as for the QUAM algorithm, with similar errors involved. In a far encounter frame, NORA can and should be measured directly from the image.
REAL-ISSCPT=(R1,R2) Where Rn is a real number, R1 specifies the line and R2 the sample of the subspacecraft point in image space (the picture before it is corrected for camera distortion). There are no defaults. THIS IS A VIEWING PARAMETER.
REAL-OSSCPT=(R3,R4) Where Rn is a real number, R3 specifies the line and R4 the sample of the subspacecraft point in object space (picture after it's been corrected for camera distortion). There are no defaults. THIS IS A VIEWING PARAMETER.
REAL-TIEPTS=(R11,R21,R31,R41,R12,R22,R32,R42,...R1N,R2N,R3N,R4N) Where RnN is a real number, TIEPTS instructs MAP3 to use the tiepoints mode and that a tiepoints list follows. This MUST be the LAST keyword specified. R1N is the line coordinate in the input picture of the Nth tiepoint. R2N is the sample of the Nth tiepoint. R3N is the latitude of the Nth tiepoint in degrees. R4N is the west longitude of the Nth tiepoint in degrees. 3<=N<=20 is expected. If N<3 the program ABENDS. If N>20 only the first twenty points are used and a warning is printed. THIS IS A VIEWING PARAMETER used in method 5.
KEYWORD-Valid:('MERCATOR)
'MERCATOR forces MAP3 to generate a Mercator projection. This
projection maps the sphere, except for the two poles, onto a strip
on the plane. The width of the strip is equal to the scaled
circumference of the planet at the equator. It extends infinitely
in both vertical directions. Longitudinal lines project to the
infinitely long, vertical straight lines which are equally spaced.
Latitudinal circles become horizontal line segments whose spacing
increases without limit as you approach the pole. The Mercator is a
conformal projection (scale errors at any point are equal in all
directions, so shapes of small areas are preserved).
THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
KEYWORD-Valid:('LAMBERT)
'LAMBERT specifies a Two-Standard Lambert Conformal Conic
projection. In this projection, two latitudinal parallels on the same
side of the equator are chosen as "standard". There will be no
scale error anywhere on these parallels. In addition, a longitudinal
line is chosen as "central". The projection is developed on a
cone which intersects the planet at the standard parallels. This
cone is cut along the meridian 180 degrees away from the central
meridian. The result is that the sphere is mapped onto the region
between two semi-infinite rays emanating from the projection of the
pole in the same hemisphere as the standard parallels. The opposite
pole is the only point on the sphere which is not mapped. Longitudinal
meridians become semi-infinite rays emanating from the visible
pole, but not at their true angle since all longitudes are confined
to lie between the two outermost rays, each of which represent the
meridian along which the cone was cut. The central meridian is the
only vertical line among the longitudinal meridians. Latitudinal circles
become circular arcs centered on the projected pole and confined
between the outer longitudinal meridians. The longitudinal rays are
equally spaced. The latitudinal circles are too widely spaced outside
the standards and too closely spaced between them. The spacing of
the latitudinal circles increases without limit as you approach the
opposite pole. As its name implies, this projection is conformal.
Neither the Mercator nor the Lambert is a true perspective
projection. You cannot produce them with a model containing a
globe, some paper, and a point source of light.
THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
KEYWORD-(Valid-'STEREOGR) 'STEREOGR requests a Stereographic projection. If POLE (see POLE parameter) is not specified and if LATITUDE (see LATITUDE parameter) does not specify + or - 90 degrees, an Oblique Stereographic projection results. The stereographic is a true perspective projection. A plane is placed tangent to the sphere at the center of projection. Perspective lines emanate from the point on the sphere diametrically opposite from the center of projection. Thus the entire sphere, except for one point, is mapped to the entire plane. Longitudinal lines and latitudinal circles project to ellipses whose spacing and orientation vary in a complicated way. The projection is conformal. Features are expanded more and more without limit as you move away from the center of projection. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
KEYWORD-(Valid-'CYLINDRI) 'CYLINDRI requests the cylindrical (normal) projection. This projection maps the sphere onto a strip on the plane. The width of the strip is equal to the scaled circumference of the planet at the equator. Longitudinal lines project to vertical lines which are equally spaced and extend from one pole to the other. Latitudinal circles become horizontal lines whose spacing varies as the cosine of the latitude. The cylindrical projection is an equal area projection. THIS IS A PROJECTION DESCRIPTIVE PARAMETER used in method 1.
KEYWORD-(Valid-'RECTANGU) 'RECTANGU requests the Simple Cylindrical (Rectangular) projection. This projection is similar to the Normal Cylindrical except that the spacing of the latitudinal circles (horizontal lines) is constant with and is equal to the spacing of the longitudinal lines. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
KEYWORD-(Valid-'ORTHOGRA) 'ORTHOGRA requests an Orthographic projection. This is a true perspective projection with perspective point at infinity. The projection plane is tangent to the planet at the center of projection. Perspective lines are parallel to each other, perpendicular to the projection plane. Thus one hemisphere centered at the center of projection is mapped to a circle on the plane of radius Req. Longitudinal meridians and latitudinal circles map to ellipses. Features are compressed relative to their true scale as you move away from the center of projection. No point more than 90 degrees away from the center can be projected. This projection is frequently used by space projects because it makes the input frame appear much as it would from the spacecraft if it were directly above the center of projection (except for the stairsteps on the limb.-ed.) THIS IS A PROJECTION DESCRIPTIVE PARAMETER used in method 1.
KEYWORD-Valid:('POLE)
'POLE is only meaningful for Orthographic and Stereographic projections.
It causes the center of projection to be the pole nearest the center of
the input frame. Polar projections are treated separately by MAP3 because
many of the equations normally used have singularities when the center of
projection is a pole. In both polar projections (Orthographic and
Stereographic) longitudinal meridians are straight lines intersectiong
at the pole at their correct angles. Latitudinal circles project to
complete circles centered on the pole. The difference between the
two lie in the spacing of the latitudinal circles and the fact that
the orthographic only fills a circular region on the plane of
projection, not the entire plane.
THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
KEYWORD-Valid:('OBCYLIND)
'OBCYIND requests the Oblique simple cylindrical projection (oblique
rectangular). Same as the rectangular projection but the planet can be
rotated before performing the projection. Neither conformal nor equal area.
KEYWORD-Valid:('SINUSOID)
'SINUSOID requests the Sinusoidal projection. Equal area. Latitudes are
horizontal parallel lines. Longitudes converge on the poles. Scale is
true along straight central meridian and all latitudes.
KEYWORD-Valid:('OBSINUSO)
'OBSINUSO requests Oblique sinusoidal projection. Same as sinusoidal except
the sphere can be rotated before the projection is performed.
KEYWORD-Valid:('MOLLWEID)
'MOLLWEID requests the mollweid projection. Equal area. Latitudes are
straight parallel lines. Longitudes converge on the poles. Scale is true
at latitudes +/- 40 deg 44 min.
KEYWORD-Valid:('TMERCATO)
'TMERCATO requests the Transverse mercator projection. Same as Mercator
except the central meridian is substituted for the equator, permitting both
poles to be seen. Central meridian, other meridians 90 degrees distant,
and the equator are straight lines.
KEYWORD-Valid:('PERSPECT)
'PERSPECT requests the Perspective projection, as seen from a framing camera
not at infinity. This is the same as the VICAR "Object Space" with this
difference: the Perspective projection has in its label all the data
required to define the projection, whereas the Image/Object-space images
require access to the SEDR/SPICE to get this information.
KEYWORD-Valid:('SOUTH)
'SOUTH is meaningful only for the Lambert projection when the latitudes of
the standard parallels are defaulted. It causes the defaults to have negative
values regardless of the latitude of the center of the input frame. This
is a rarely used parameter. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-SCALE=R1 Where R1 is a real number, SCALE is the scale, in km/pixel, at the undistorted part of the projection. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-LINE=R1
Where R1 is a real number, LINE is used as a PROJECTION DESCRIPTIVE
PARAMETER. Each is explained as follows:
METHOD
REAL-SAMPLE=R2
Where R2 is a real number, SAMPLE is used as a PROJECTION DESCRIPTIVE
PARAMETER. Each is explained as follows:
METHOD
REAL-LATITUDE=R3
Where R3 is a real number, LATITUDE is used as a PROJECTION DESCRIPTIVE
PARAMETER .Each is explained as follows:
METHOD
REAL-LONGITUD=R4
Where R4 is a real number, LONGITUD is used as a PROJECTION DESCRIPTIVE
PARAMETER. Each is explained as follows:
METHOD
REAL-PAR1=R1 Where R1 is a real number, PAR1 is the latitude in degrees of the northernmost of the two standard parallels. Default is 59.17 for northern hemisphere input frames and -35.83 for southern. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-PAR2=R2 Where R2 is a real number, PAR2 is the southernmost of the two standard parallels. Default is 35.83 or -59.17. PAR1 and PAR2 must have the same sign or the projection is undefined. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-LIN1=R3 Where R3 is a real number, LIN1 is the line in the output frame at which the northern standard parallel's projected arc is to intersect the central meridian. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-LIN2=R4 Where R4 is a real number, LIN2 is the same as LIN1 but refers to the southern standard parallel. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-NORTH=R5 Where R5 is a real number, NORTH is the angle in degrees of north in the output picture. This angle is measured in the projection plane at the center of projection clockwise from up. NORTH need not be related to NORA, discussed in the Viewing Geometry section. The default is to compute NORTH so that the center of projection and another point which lies on the same line in the input picture as the C.P. fall on the same line in the output picture. As long as the C.P. lies somewhere in the input frame this technique minimizes relative rotation from input to output. If, due to the C.P. lying near the limb, the program is unable to perform the above calculation, the value of NORA obtained from the SEDR or parameter list is used. If the C.P. lies near a limb and no SEDR is available, it is risky to default NORTH. R5 in method 6 (Polar Stereographic and Orthographic) is meaningless and is ignored in polar projections. THIS IS A PROJECTION DESCRIPTIVE PARAMETER (Oblique Stereographic and Orthographic).
REAL-PLAT=R1 Where R1 is a real number, PLAT is the latitude of an arbitrary point. Default is the latitude of the center of the input picture. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-PLON=R1 Where R1 is a real number, PLON is the longitude of an arbitrary point. Default is the longitude of the center of the input frame. THIS IS A PROJECTION DESCRIPTIVE PARAMETER used in method 7.
REAL-PLINE=R1 Where R1 is a real number, PLINE is a line near which the point at (PLAT,PLON) will project. Default is NL/2. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
REAL-PSAMPLE=R1 Where R1 is a real number, PSAMPLE is a sample near which the point at (PLAT,PLON) will project. Default is NS/2. THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
KEYWORD-Valid:('RECENTER)
'RECENTER turns on the recentering algorithms. It need be specified only if
you want defaults for all of PLAT, PLON, PLINE, and PSAMPLE. Using this
keyword alone forces the input picture to fall in the center of the output
picture even if the LATITUDE and LONGITUDE parameters specify a point (or
meridian) far outside the input frame.
THIS IS A PROJECTION DESCRIPTIVE PARAMETER.
Ex: TARGET=GANYMEDE specifies that GANYMEDE is the target in the input image. The TARGET may be a planet, satellite, or asteroid. If defaulted, the target name is extracted from the VICAR label or determined by other TBD means. A complete list of valid target names is located in the ASCII file assigned the logical name (or environmental variable) BODY_IDS.
SPICEMODE=LOCAL specifies that SPICE data is to be retrieved from local SPICE kernels. SPICEMODE=REMOTE specifies that SPICE data is to be retrieved via the SPICE server. If SPICEMODE is defaulted, the logical name (or environmental variable) DEFAULTSPICE is used to determine whether LOCAL or REMOTE is used. Note that if SPICE data is not found in LOCAL or REMOTE mode, the other mode is attempted.
CKNAME is a four character string specifying the C-kernel to be used: CKNAME C KERNEL -------- ------------- DAVI MIPS_DAVI.CK NAV MIPS_NAV.CK FARE MIPS_FARENC.CK NAV2 MIPS_NAV2.CK NEAR MIPS_NEAR.CK AMOS MIPS_AMOS.CK NAIF the best NAIF kernel is used If defaulted, the kernels are searched in the above order.
CKID is an alternative way to specify the prefered C-kernel (see CKNAME
parameter):
CKID CKNAME C KERNEL
---- -------- -------------
M906 DAVI MIPS_DAVI.CK
M905 NAV MIPS_NAV.CK
M904 FARE MIPS_FARENC.CK
M903 NAV2 MIPS_NAV2.CK
M902 NEAR MIPS_NEAR.CK
M901 AMOS MIPS_AMOS.CK
varies NAIF there are a large number of these files
Ex: CKID=M901 specifies the four character ID which uniquely identifies the
C-kernel MIPS_AMOS.CK.
A complete list of the C-kernel IDs is located in the ASCII file assigned the
logical name (or environmental variable) KERNELDB.
If specified, CKID overrides the CKNAME parameter.
USERID is a three character string which identifies the user who created the
camera pointing.
Ex: USERID=HBM identifies Helen Mortensen as the creator of the camera
pointing.
GROUPID is a three character string which identifies the group which created the camera pointing. Ex: GROUPID=040 identifies group 040 as the creator of the camera pointing.
INSTITUTE is a four character string identifying the facility which created the camera pointing. Ex: INSTITUTE=MIPS specifies that MIPS created the camera pointing.
PURPOSE is a four character string identifying the purpose of the observation or the purpose of processing. For example, PURPOSE=MOSA identifies the image as part of a mosaic sequence PURPOSE=COLO identifies the image as part of a color sequence
PROGRAM is the first six characters of the program creating the camera pointing. Ex: PROGRAM=FARENC specifies that FARENC created the camera pointing.
SPKID specifies the four character ID which uniquely identifies the SP kernel used to create the camera pointing. The SP-kernel IDs are located in the ASCII file assigned the logical name (or environmental variable) KERNELDB. Ex: SPKID=N015 specifies the SP kernel GLL_LONG_2.BSP
REQUNUM is a four character string identifying the IPL request number for which the camera pointing was created. Ex: REQNUM=3456 identifies (somewhat) request number R123456
Date and time the camera pointing was created in the form 'YEARMMDDHHMM'.
Ex: CDATE=199602291200 specifies that the pointing was created at noon
on February 29, 1996.
The PRINT parameter prints computational information for the specified range of output lines. (By default this info is not printed.) This is intended as an aid in interpreting the output image and as a means of checking Map3 operations. (This data does not go into the session log.) The first set of information printed is the GRID POINT INFO. For a grid of points in the output image, Map3 computes latitude, longitude, and the corresponding line and sample coordinates in the input image. The second set of information printed is the INFO FOR SOME OUTPUT POINTS. This set usually contains fewer lines than the GRID POINT INFO. The two sets are interleaved as Map3 works down through the output image. Each set of INFO FOR SOME OUTPUT POINTS is preceded by a header and can be distinguished from the GRID POINT INFO by the presence of the output DN value. (The subsequent GRID POINT INFO follows the Output Point info without a separating line or header.) If the header "INFO FOR SOME OUTPUT POINTS" does not appear, these lines in the output image are either zeros or not much greater than the DNTHRESH value. There are two forms used for output point info. If there is an asterisk after the latitude and longitude, these values are approximate, being taken from one of the adjacent grid points. A better value can be obtained by interpolating between the adjacent four grid points, remembering that these functions are often non-linear. If there is no asterisk after latitude and longitude, these values are precise.