residuals.e

Residuals tests the landmarks to look for problems. It will give you a report based on landmarks, pictures and maps.

Input - files

• LMKFILES

• IMAGEFILES

• PICTLIST.TXT

• LMRKLIST.TXT

Input - stdin

• enter plim (px,km,km)

• The number of pixels an images needs to be "off" to throw the chevron (>>) flag

• The rms error of a landmark
• Sets the "bin" size for the final histogram (basically how many images are in which side categories). input operation list

     2.5, 1, 001

Output

• MAPINFO.TXT

• PICINFO.TXT

• LIMINFO.TXT

• RESIDUALS.TXT

Description

• Compares predicted and observed pixel, line position of the landmarks in the images
• Produces RSS of the diagonal convariance elements of each control point
  • Describes landmark position uncertainty
• Flags landmarks with residuals over specified pixel value

Control Points

• Inputs are wweights for S/C uncertainties from measurement uncertainties and from a-prior shape constraints

• Control points solution results in a 3x3 output covariance for each control point. Diagonal elements are uncertainties along maplet coord. system axes, i.e. two horizontal directions & height. Typically SPC produces comparable horizontal & height uncertainties. Results are summarized as a scalar standard deviation per degree of freedom in meters

• Residuals check automatically flags errors beyond certain input values in dump file for ease of inspection

Image Residuals

• The post-fit residuals between predicted and actual control point positions in all images are captured in the residuals file
• The post-fit residuals between predicted and actual control point difference between adjacent, overlapping maplets are captured in the residuals file
• Outliers in both quantities are flagged automatically based on input threshold criteria

CategoryPrograms