make_tilefile

(compiled by DL)

Purpose: Program to generate the pixel/line maplet-center locations required to complete the tiling of a bigmap at a user-specified resolution.

The make_tilefile utility analyses a coverage_m.pgm file, which is the output of map_coverage, for areas that still need to be tiled. The output of this program is then put in the make_scriptT.in file. (Taken from SPOC v3.02A PDF/UTILITIES/make_tilefile.f File Reference.)

Requires

• coverage_m.pgm - A Portable Graymap Format image of the bigmap-tiling at the user-specified maplet resolution, generated using map_coverage.

Output

• std-out - list of bigmap pixel/line coordinates for new maplet center locations.

Using make_tilefile

The program requires a single user-input - Upwards? (y/n):

 Upwards? (y/n)
n
      50   50
     100   50
     150   50
     200   50
      50  100
     100  100
     150  100
     200  100
      50  150
     100  150
     150  150
     200  150
      50  200
     100  200
     150  200
     200  200
END

 Upwards? (y/n)
y
      50  200
     100  200
     150  200
     200  200
      50  150
     100  150
     150  150
     200  150
      50  100
     100  100
     150  100
     200  100
      50   50
     100   50
     150   50
     200   50
END

The output columns are the pixel and line coordinates respectively.

Upwards? - Y: Tile from the Southern-most line, West-to-East and South-to-North.

Upwards? - N: Tile from the Northern-most line, West-to-East and North-to-South.

The user may enter input and capture output in a single command line as follows:

echo "N" | make_tilefile > out

however, the first line of output will need to be discarded using a text editor.