lithos

Aligns maplets to the current shape model and will provide slight changes to the shape (stored in MAPFILES).

Lithos is the key for SPC. It works on a single landmark, which defined the associated maplet. This landmark must be created (i.e. fully defined) and all the images that include it must be shifted so that everything is aligned. Once those are done, you can calculate the topography which includes identify other maps that overlap, creating a template, and then solving the whole system.

Lithos and LithosP are used by make_script(P) for batch processing. The mark_script program will create a script for each landmark that you will process, which is taken as input (e.g. lithos < LAND01.IIN > LAND01.OOT)

Build a template

• Option 0

Align images

• Option 1

Calculate topography

• Option 2

Housekeeping functions

• Option c - create a landmark
• Option i - "input" a landmark. Basically, start using the landmark.
• Option e - eliminate
  • - Good values to use, "0 40 0.2 0.2 0 2"
  • - Based on: Input INVLIM, SLIM, CLIM, ILIM, RSMN, RSMX
  INVLIM
  Fraction of the landmark that is obscured by other objects (that is in front)
  1000 * max invisible fraction (0-1000).
  Suggested: 0
  0 keeps everything
  SLIM
  Emission Angle: drop if greater than (0-90 degrees).
  Suggested: 40, eliminate images with big emissions angles.
  90 keeps everything
  CLIM
  How much of the maplet is visible: Drop if less than (0-1.0).
  Suggested: 0.2, the image must only contain 20% of the maplet.
  0 keeps everything
  ILIM
  How much of maplet is in shadows, drop if more than (0-1.0).
  Suggested: 0.2, the image cannot have more than 20% in shadow.
  0 keeps everything
  RSMN
  Minimum ratio of the image to maplet, drop if less than (0 to inf).
  Suggested: 0, accept the highest resolution images you can.
  0 keeps everything
  RSMX
  Maximum ratio of the image to maplet, drop if less than (0 to inf).
  Suggested: 2, reject images with less than twice the resolution of your maplet.
  999999 keeps everything

Input - optional file

• aaa.INN - a script that sends batch commands

Input - stdin

• Basic steps
• Create a landmark, "C"
• Input a landmark (really that is selecting it for use), "I"
• Creating a template (the virtual idea of the topography and albedo based on the maplets), 0, 0, 40
• Aligning the maplets (0 for auto, 1 for manual, 2 for move all maplets, 3 to align to a specific maplet)
• Update and save, "U 1"

Output

• aaa.OOT
• landmark and map files
• LMRK_DISPLAY0.pgm
• LMRK_DISPLAY1.pgm -- stretched version
• slopeb.pgm - shows slope both in x and y

PowerPoint Notes

=== Description ==

• Creates landmark files, determines landmark topography (MAPFILE), and locates landmark center in images

Inputs

• INIT_LITHOS.TXT
• SUMFILESR
• SPC IMG
• NOMINALS
• SPICE
• MAPLETSL

Outputs

• SUMFILESL
• LMKFILESL
• MAPLETSL
• LMRKLIST.TXT

Process Overview

CategoryPrograms