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ISIS 3 Application Documentation


ringscam2map

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Convert camera image to a map projection

Overview Parameters

Description

This program projects an ISIS level0 or level1 cube to a map (ISIS level2 cube). The input cube requires SPICE data and therefore the program spiceinit should be run on it with shape set to RingPlane prior to ringscam2map. The map projection is defined using a PVL file specified with the MAP parameter. The system default is to use the Planar projection ($ISIS3DATA/base/templates/maps/planar.map). To learn more about using map projections in ISIS, refer to the ISIS Workshop "Learning About Map Projections".

If you need to generate your own map file you can use the maptemplate program or alternatively, hand create a file using your favorite editor. The file need only specify the ProjectionName as defaults will be computed for the remaining map file parameters. The following table indicates how the defaults are established:

PARAMETER DEFAULT
TargetName Read from Instrument group in the input cube labels
RingLongitudeDirection CounterClockwise
RingLongitudeDomain Normally, 360. However, if the 180 domain causes less area to need to be projected then 180.
MinimumRingRadius
MaximumRingRadius
MinimumRingLongitude
MaximumRingLongitude
Computed from the input cube or read from the map file. However, any combination of the four values can then be overridden by the user. The values the user specifies are expected to be in the coodinate system of the projection.
PixelResolution
Scale
Computed from the input cube or read from the map file. The value can be overridden by the user.

If you only entered the input cube (FROM) and output cube (TO) and changed no other parameters the following is the default Mapping group:

  Group = Mapping
    TargetName             = Obtained from the Instrument group

    RingLongitudeDirection     = CounterClockwise
    RingLongitudeDomain        = 360 (Could be automatically adjusted to 180 by RINGLONSEAM)

    MinimumRingRadius          = Computed from the input camera cube
    MaximumRingRadius           = Computed from the input camera cube
    MinimumRingLongitude          = Computed from the input camera cube
    MaximumRingLongitude          = Computed from the input camera cube

    ProjectionName         = Planar
    CenterRingLongitude        = Average of MinimumRingLongitude and MaximumRingLongitude
    PixelResolution        = Computed from the input camera cube
  EndGroup
    
The map file can be an existing map projected (level2) cube. A level2 cube has PVL labels and contains the Mapping group. Depending on the values of the input parameters, the output cube can use some or all of the keyword values of the map file. For instance, setting MATCHMAP = true causes all of the mapping parameters to come from the map file, resulting in an output cube having the same number of lines and samples as the map file. If MATCHMAP = true and the map file is missing a keyword like PixelResolution, the application will fail with a PVL error. Setting MATCHMAP=false allows for some of the mapping components to be overridden by the user or computed from the FROM cube.

If you are attempting to construct a mosaic, it is important that the PixelResolution, RingLongitudeDirection, RingLongitudeDomain, ProjectionName, and projection specific parameters (e.g., CenterRingLongitude, CenterRingRadius) are the same for all cubes. That is, you should create one map file and use it as input for all the cubes in your mosaic. By letting the minimum and maximum ring radius and ring longitude values default, the application will determine the coverage of each image. However, if the mosaic Ring Radius and Ring Longitude range is entered, each output image will be projected to the full size of the mosaic resulting in large file sizes and images with many NULL pixels. The following Mapping group could be used for mosaicking:

 Group = Mapping
   ProjectionName         = Planar
   CenterRingLongitude        = 0
   PixelResolution        = 10000 <meters>
 EndGroup
   

Finally, depending on the projection, problems can occur with cubes that fall on the projection ring longitude seam. For example, if you are making a mosaic with RingLongitudeDomain = 360 and your cube crosses 0/360 seam, this program would compute the default ring longitude range of the cube to MinimumRingLongitude = 0 and MaximumRingLongitude = 360. A very large output image could be created depending on the pixel resolution. The RINGLONSEAM parameter allows you to selectively handle this case. If you are making mosaics near the seam you will need to understand and alter the default for this parameter. Section 14 of The ISIS Workshop "Learning About Map Projections" includes an example to help illustrate the problem. Note that if the user chooses to match the map file, then the user can not set this parameter. The program will behave as if RINGLONSEAM="CONTINUE".


Categories


Related Applications to Previous Versions of ISIS

This program replaces the following applications existing in previous versions of ISIS:
  • cam2map
  • lev1tolev2
  • plansinu
  • planorth

History

Kay Edwards1986-09-02 Original version
Jeff Anderson2003-05-02 Converted to Isis 3.0
Jeff Anderson2003-06-05 Added to Camera category
Stuart Sides2003-07-29 Modified filename parameters to be cube parameters where necessary
Jeff Anderson2003-12-01 Reworked defaults for user parameters
Jeff Anderson2004-01-21 Modified resolution parameters to eliminate inclusion/exclusion dependences.
Jeff Anderson2004-02-13 Added AUTOLON parameter
Jeff Anderson2004-02-25 Fixed bug with ground range user option
Elizabeth Miller2005-10-25 Added appTest
Jacob Danton2005-12-02 Updated appTest
Elizabeth Miller2006-03-23 Fixed appTest to reflect changes made in all camera models
Tracie Sucharski2006-04-04 Check to see if center of input image projects, if it does, force the tile containing center to be processed in ProcessRubberSheet.
Jeff Anderson2006-04-04 Reworked user interface
Elizabeth Miller2006-04-10 Reworked code for new user interface and added helper buttons
Elizabeth Miller2006-05-18 Depricated CubeProjection and ProjectionManager to ProjectionFactory
Elizabeth Miller2006-05-30 Moved Helper buttons and fixed error checking in helper methods
Elizabeth Miller2006-09-06 Modified call to ProjectionFactory CreateForCube method to include a value of false for the newly added sizeMatch parameter
Jeff Anderson2006-12-06 Test to see if target is sky and abort
Jeff Anderson2007-03-13 Add minimize option for DEFAULTRANGE
Steven Lambright2007-06-22 Fixed typo and corrected XML
Steven Lambright2007-08-22 Fixed lonseam option to work with minimize option correctly
Stuart Sides2008-02-11 Fixed bug where the ground range was not pulled from the map file when it was supposed to be (using DEFAULTRANGE = MAP).
Christopher Austin2008-04-18 Added the MATCHMAP option.
Steven Lambright2008-05-12 Removed references to CubeInfo
Christopher Austin2008-07-15 Changed MATCHMAP to default off
Steven Lambright2008-08-04 Changed MATCHMAP to have exclusions. If MATCHMAP is true, the PIXRES and DEFAULTRANGE options can not be set. Changed the code to enforce MATCHMAP.
Steven Lambright2008-09-10 Added the ability to change ProcessRubberSheet's tiling sizes. Now the Camera will decide upon the tiling sizes used in ProcessRubberSheet, in order to fix problems found with the push frame cameras which have small framelet sizes (less than 64 pixels tall). This is a passive ability with respect to the user; no options or differences should be noticable.
Christopher Austin2008-10-31 Fixed DEFAULTRANGE > CAMERA option to accept MINLAT, MAXLAT, MINLON, and MAXLON as overriding values.
Christopher Austin2009-01-27 Fixed parameter names.
Travis Addair2009-08-10 Mapping group parameters are now placed into the print file.
Steven Lambright2011-01-31 Improved documentation
Jai Rideout2011-02-10 Print file now includes PixelResolution, Scale, UpperLeftCornerX, and UpperLeftCornerY in Mapping group.
Lynn Weller and Debbie A. Cook2012-01-17 Updated documentation text, added glossary links, and improved compatability with Isis documentation.
Jeff Anderson2012-04-30 Add forward and reverse patch rubbersheeting parameters.
Debbie A. Cook2012-07-06 Updated Spice members to be more compliant with Isis coding standards. References #972.
Ken Edmundson and Debbie A. Cook2013-03-06 Revised to work with ring data. References #975.
Jeannie Backer2013-03-12 Added appTests. Test coverage appears low (60% scope, 60% line, 38% function), however these tests cover a large portion in all three categories for the code that does not apply to the GUI helper methods. References #775.
Jeannie Backer2013-03-12 Re-added "if MATCHMAP" statements since the IsisAml is not interpreting exclusions as expected. Added exclusion - if MATCHMAP is true, then the parameter RINGLONSEAM is excluded. References #775.

Parameter Groups

Files

Name Description
FROM Input cube to project
MAP File containing mapping parameters
TO Newly mapped cube
MATCHMAPMatch the map file

Output Map Resolution

Name Description
PIXRESDefines how the pixel resolution in the output map file is obtained
RESOLUTIONPixel resolution

Output Map Ground Range

Name Description
DEFAULTRANGEDefines how the default ground range is determined
MINRINGRADMinimum Ring Radius
MAXRINGRADMaximum Ring Radius
MINRINGLONMinimum Ring Longitude
MAXRINGLONMaximum Ring Longitude
TRIM Null all pixels outside rad/az boundaries

Ring Longitude Seam Options

Name Description
RINGLONSEAM How should images at the ring longitude seam be handled

Options

Name Description
INTERPType of interpolation
WARPALGORITHMWarp algorithm
PATCHSIZEPatch size for forward or reverse warping
X

Files: FROM


Description

The specification of the input cube to be projected. The cube must have been initialized using the spiceinit program with shape set to RingPlane.

Type cube
File Mode input
Filter *.cub
Close Window
X

Files: MAP


Description

A file containing the desired output mapping parameters in PVL. This file can be a simple label file, hand produced, or created via the maptemplate program. It can also be an existing cube or cube label which contains a Mapping group. In the latter case the FROM cube will be transformed into the same map projection, resolution, etc.

Type filename
File Mode input
Default Path $base/templates/maps
Default $base/templates/maps/planar.map
Filter *.map *.cub
Close Window
X

Files: TO


Description

This file is the map projected (level2) image.

Type cube
File Mode output
Filter *.cub
Close Window
X

Files: MATCHMAP


Description

This forces all of the mapping parameters to come from the map file. Additionally, when the map file is an image the TO file will have the same number of lines and samples as the map file.

Type boolean
Default false
Exclusions
  • PIXRES
  • RESOLUTION
  • DEFAULTRANGE
  • MINRINGRAD
  • MAXRINGRAD
  • MINRINGLON
  • MAXRINGLON
  • RINGLONSEAM
Close Window
X

Output Map Resolution: PIXRES


Description

This parameter is used to specify how the pixel resolution is obtained for the output map projected cube.

Type string
Default CAMERA
Option List:
Option Brief Description
CAMERACompute resolution from input cube This option will automatically determine the resolution from the input cube specified using the FROM parameter.

Exclusions

  • RESOLUTION
MAPRead resolution from input map file This option will use either the PixelResolution (meters/pixel) or Scale (pixels/degree) in the map file.

Exclusions

  • RESOLUTION
MPP Get resolution from user in meters per pixel This option allows the user to specify the resolution in meters per pixel using the RESOLUTION parameter

Inclusions

  • RESOLUTION
PPD Get resolution from user in pixels per degree This option allows the user to specify the resolution in pixels per degree using the RESOLUTION parameter

Inclusions

  • RESOLUTION
Close Window
X

Output Map Resolution: RESOLUTION


Description

Specifies the resolution in either meters per pixel or pixels per degree

Type double
Minimum 0.0 (exclusive)
Close Window
X

Output Map Ground Range: DEFAULTRANGE


Description

This parameter is used to specify how the default ring ground ranges (radius and longitude) for the output map projected image is obtained. The ground range can be obtained from the camera or map file. Note the user can overide the default using the MINRINGRAD, MAXRINGRAD, MINRINGLON, MAXRINGLON parameters. The purpose of the ground range is to define the coverage of the map projected image. Essentially, the ground range and pixel resolution are used to compute the size (samples and line) of the output image.

Type string
Default MINIMIZE
Option List:
Option Brief Description
MINIMIZEMinimize output image size This option will use the camera and projection in combination to ensure the output image size (samples, lines) is minimized. Using a ground range can cause NULL padding for projections with curved merdians and/or parallels and hence large output images. The amount of padding can be quite large for extremely high resolution maps.

Exclusions

  • MINRINGRAD
  • MAXRINGRAD
  • MINRINGLON
  • MAXRINGLON
  • TRIM

Inclusions

  • RINGLONSEAM
CAMERA Compute default range from input cube This option will automatically determine the ring radius range (mininum ring radius, maximum ring radius) and the ring longitude range (minimum ring longitude, maximum ring longitude) from the input camera model cube specified using the FROM parameter.

Inclusions

  • RINGLONSEAM
MAP Read default range from map file This option will read the ring ranges (RingRadiusMininum, RingRadiusMaximum, RingLongitudeMinimum and RingLongitudeMaximum keywords) from the input map file. All four values are expected to be defined.

Exclusions

  • RINGLONSEAM
Close Window
X

Output Map Ground Range: MINRINGRAD


Description

The minimum ring radius of the output map. If this is entered by the user it will override the default camera or map value. Units are meters.

Type double
Internal Default Use default range
Minimum 0. (inclusive)
Maximum 9999999999.0 (inclusive)
Close Window
X

Output Map Ground Range: MAXRINGRAD


Description

The maximum ring radius of the output map. If this is entered by the user it will override the default camera or map value. Units are meters.

Type double
Internal Default Use default range
Minimum 0.0 (inclusive)
Maximum 999999999999.0 (inclusive)
Greater Than MINRINGRAD
Close Window
X

Output Map Ground Range: MINRINGLON


Description

The minimum ring longitude of the output map. If this is entered by the user it will override the default camera or map value. By default, clockwise ring longitudes in the range of 0 to 360 are assumed unless the map file specifies otherwise.

Type double
Internal Default Use default range
Close Window
X

Output Map Ground Range: MAXRINGLON


Description

The maximum ring longitude of the output map. If this is entered by the user it will override the default camera or map value. By default, positive east ring longitudes in the range of 0 to 360 are assumed unless the map file specifies otherwise.

Type double
Internal Default Use default range
Greater Than MINRINGLON
Close Window
X

Output Map Ground Range: TRIM


Description

If this option is selected, pixels outside the ring radius range or the ring longitude range will be trimmed (set to null). This is useful for certain projections whose lines of ring radius and ring longitude are not parallel to image lines and sample columns.

Type boolean
Default FALSE
Close Window
X

Ring Longitude Seam Options: RINGLONSEAM


Description

With this option you can turn on/off the automatic ring longitude domain switching that occurs when a file crosses the boundary of the ring longitude domain (0 to 360 or -180 to 180). If the automatic switching is turned off, then you have the choice of making the program continue or exit when the cube does cross the boundary.

Type string
Default AUTO
Option List:
Option Brief Description
AUTOIf the cube crosses the seam, automatically switch the RingLongitudeDomain. If the cube crosses the ring longitude seam, then the program will automatically compute the RingLongitudeDomain. When the cube is near 0 or 360 degrees, the program will assume 180 RingLongitudeDomain. When the cube is near 180 or -180 degrees, the program will assume 360 RingLongitudeDomain.
ERRORIf the cube crosses the seam, abort the program. If the cube has a LongitudeDomain of 360 and the image crosses the seam at 0/360 degrees or or the cube has a LongitudeDomain of 180 and the image crosses the seam at -180/180 degrees, then the program will exit with an error message.
CONTINUEIf the cube crosses the seam, continue program and keep the RingLongitudeDomain. If the cube crosses the ring longitude seam, the program will continue. The RingLongitudeDomain will not be changed from the domain in the map file. If the map file does not have a RingLongitudeDomain, the default of 360 LongitudeDomain will be used. Note that this could create an extremely large image.
Close Window
X

Options: INTERP


Description

This is the type of interpolation to be performed on the input.

Type string
Default CUBICCONVOLUTION
Option List:
Option Brief Description
NEARESTNEIGHBORNearest Neighbor Each output pixel will be set to the pixel nearest the calculated input pixel.
BILINEARBi-Linear interpolation Each output pixel will be set to the value calculated by a bi-linear interpolation of the calculated input pixel.
CUBICCONVOLUTIONCubic Convolution interpolation Each output pixel will be set to the value calculated by a cubic convolution interpolation of the calculated input pixel.
Close Window
X

Options: WARPALGORITHM


Description

Used to choose the warping algorithm, either the forward patch algorithm or the reverse patch algorithm. The default is to automatically choose the algorithm based on the input camera type (e.g., framing, linescan, pushframe).

Type string
Default AUTOMATIC
Option List:
Option Brief Description
FORWARDPATCHForward patch warp algorithm Patches are uniformly distributed over the input cube (FROM). For each input patch, the radius/longitude of the four corner coordinates are computed using the camera model. Those four radius/longitude coordinates are used by the map projection to determine four output pixel coordinates. Then, the four output to input image coordinates are fit with two affine transforms. That is, inputsamp=f(outputsamp,outputline) and inputline=g(outputsamp,outputline) where f = A+B*outputsamp+C*outputline and similarly for g. If the estimated input/sample line (as computed by the affine transform) at the center of the patch is within a tenth of a pixel of the actual computation using the projection and camera model, the affine transforms are used to place the calculated input pixels in the output patch (using the specificed INTERPOLATOR).

Inclusions

  • PATCHSIZE
REVERSEPATCHReverse patch warp algorithm Patches are uniformly distributed over the output cube (map projected product). For each output patch, the radius/longitude of the four corners coordinates are computed using the map projection. Those four radius/longitude coordinates are used by the camera model to determine four input pixel coordinates. Then the four output to input image coordinates are fit with two affine transforms. That is, inputsamp=f(outputsamp,outputline) and inputline=g(outputsamp,outputline) where f = A+B*outputsamp+C*outputline and similarly for g. If the estimated input/sample line (as computed by the affine transform) at the center of the patch is within a tenth of a pixel of the actual computation using the projection and camera model, the affine transforms are used to place the calculated input pixels in the output patch (using the specificed INTERPOLATOR).

Inclusions

  • PATCHSIZE
AUTOMATICAutomatically select warp algorithm The automatic option will choose the appropriate algorithm depending on the camera type of the input cube (TO). If the cube is a framing camera image, the reverse algorithm will be used with a PATCHSIZE of 4. If the cube is a line scan image, the forward algorithm will be used with a PATCHSIZE of 5. If the cube is a push frame camera (e.g., LRO WAC, MRO MARCI, or THEMIS VIS) the forward transform with a PATCHSIZE of the pushframe framelet height will be used. It is recommended that you always use automatic for push frame cameras to ensure the patch size does not cross multiple framelets.

Exclusions

  • PATCHSIZE
Close Window
X

Options: PATCHSIZE


Description

The forward and reverse patch algorithms try to fit an affine tranform between the camera model coordinate and projection coordinate using the four corners of the patches. Patchs that are too large may run faster at the risk of missing higher resolution information about the DTM. For example a patch of 256x256 may have the same elevation at the four corners and center of the grid but a crater may exist in one of the four quadrants of the patch. The crater, up to 128 pixels in diamter may not be properly orthorectified. In general, small patch sizes are recommended (e.g., 4, 8). NOTE: For FORWARDPATCH, if the entered PATCHSIZE is less than or equal to 1, it is automatically reset to 3.

Type integer
Minimum 1 (inclusive)
Close Window