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Point target generation
Added by Naeem Shahzad over 4 years ago
Hello, in IPTA there are two approaches to generate point lists (spectral diversity and temporal variability)(binary files). I wan to incorporate another point list generated on the basis of phase stability (StaMPS), and combine the point list altogether for IPTA. Is there any idea how to combine the point list generated using StaMPS with the pt list in GAMMA?
Regards
Naeem
Replies (2)
Point target generation - Added by Charles Werner over 4 years ago
Hello Naeem,
Yes there is a way. The IPTA package has a program to merge point lists, not
surprisingly called merge_pt, that lets you combine different point lists into a
single point list without redundancy of points:
- IPTA Program merge_pt.c ***
- Copyright 2018, Gamma Remote Sensing, v1.8 26-Apr-2018 clw/cm ***
- Merge of point lists ***
usage: merge_pt <plist_tab> <plist_out> <N_min> <r_tol> <az_tol>
input parameters:
plist_tab (input) text file containing names of input point lists and masks
(each line contains one point list and optionally one mask name)
plist_out (output) point list derived from merging input point lists
N_min occurance number minimum to include a point to the output list
r_tol range position tolerance for counting occurances
az_tol azimuth line tolerance for counting occurances
The positions of the IPTA points are stored as pairs of 32 bit integers: x, y
(column, row) in a binary file called the point list (pt).
If you have the coordinates of poinsts selected by STaMPS in text format:
first column X, second column Y, you can use the gamma program text2pt. This
program will convert the text format point list to binary format.
The input to merge_pt is a list of point list file names.
You can display all the point locations using ras_pt. Remember the point
coordinates are usually in the original SLC geometry, not the multilook geometry
of a display image.
best regards,
Charles
RE: Point target generation - Added by Naeem Shahzad over 4 years ago
Dear Sir, Charles
Thank you for the guidance. It worked in my case.
Regards
Naeem