Javad BIN

The following code was tested for files with header='JGGEO102'. For headerless files and for JGGEO101 YMMV.

import os,sys
import struct

def printf(format,*args):
 sys.stdout.write(format % args)

fname=sys.argv[1]
fin = open(fname, "r")

if len > 0xb2:
header,  = struct.unpack("8s",fin.read(8))
magic,   = struct.unpack("b",fin.read(1))
misc_xx, = struct.unpack("57s",fin.read(57))

minx,   = struct.unpack("d",fin.read(8))
maxy,   = struct.unpack("d",fin.read(8))
maxx,   = struct.unpack("d",fin.read(8))
miny,   = struct.unpack("d",fin.read(8))
dx,     = struct.unpack("d",fin.read(8))
dy,     = struct.unpack("d",fin.read(8))
 
ncol,   = struct.unpack("I",fin.read(4))
nrow,   = struct.unpack("I",fin.read(4))
unk1,   = struct.unpack("I",fin.read(4))
unk11,  = struct.unpack("I",fin.read(4))
ncol2,  = struct.unpack("I",fin.read(4))
nrow2,  = struct.unpack("I",fin.read(4))
type,   = struct.unpack("I",fin.read(4))
unk3,   = struct.unpack("I",fin.read(4))
interp, = struct.unpack("I",fin.read(4))
nul1,   = struct.unpack("I",fin.read(4))
nul2,   = struct.unpack("I",fin.read(4))

zscale, = struct.unpack("d",fin.read(8))
zmin,   = struct.unpack("d",fin.read(8))
nvals,  = struct.unpack("I",fin.read(4))

for i in range(0,nrow*ncol):
 row = int(i/ncol)
 col = i%(ncol)
 if type == 3: # int2
  val, = struct.unpack("H",fin.read(2))
  printf("%.9f %.9f %13.6f\n", (minx+col*dx)*R2D,(miny+row*dy)*R2D, zmin+(val-1)/zscale)
 if type == 4: # int4
  val, = struct.unpack("I",fin.read(4))
  printf("%.9f %.9f %13.6f\n", (minx+col*dx)*R2D,(miny+row*dy)*R2D, zmin+val/zscale) # val-1 ?
 if type == 5: # float4
  val, = struct.unpack("f",fin.read(4))
  printf("%.9f %.9f %13.6f\n", (minx+col*dx)*R2D,(miny+row*dy)*R2D, zmin+val)