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PocketTopo File Formats
17.3.2010 bh
PocketTopo Data File (.top)
Version 3
File = {
Byte 'T'
Byte 'o'
Byte 'p'
Byte 3 // version
Int32 tripCount
Trip[tripCount] trips
Int32 shotCount
Shot[shotCount] shots
Int32 refCount
Reference[refCount] references
Mapping overview
Drawing outline
Drawing sideview
}
Trip = {
Int64 time // ticks (100ns units starting at 1.1.1)
String comment
Int16 declination // internal angle units (full circle = 2^16)
}
Shot = {
Id from
Id to
Int32 dist // mm
Int16 azimuth // internal angle units (full circle = 2^16, north = 0, east = 0x4000)
Int16 inclination // internal angle units (full circle = 2^16, up = 0x4000, down = 0xC000)
Byte flags // bit0: flipped shot
Byte roll // roll angle (full circle = 256, disply up = 0, left = 64, down = 128)
Int16 tripIndex // -1: no trip, >=0: trip reference
if (flags & 2)
String comment
}
Reference = {
Id station
Int64 east // mm
Int64 north // mm
Int32 altitude // mm above sea level
String comment
}
Mapping = { // least recently used scroll position and scale
Point origin // middle of screen relative to first reference
Int32 scale // 10..50000
}
Drawing = {
Mapping mapping
Element[] elements
Byte 0 // end of element list
}
Element = {
Byte id // element type
...
}
PolygonElement = {
Byte 1 // id
Int32 pointCount
Point[pointCount] points // open polygon
Byte color // black = 1, gray = 2, brown = 3, blue = 4; red = 5, green = 6, orange = 7
}
XSectionElement = {
Byte 3 // id
Point pos // drawing position
Id station
Int32 direction // -1: horizontal, >=0; projection azimuth (internal angle units)
}
Point = { // world coordinates relative to first station in file
Int32 x // mm
Int32 y // mm
}
Id = { // station identification
Int32 value // 0x80000000: undefined, <0: plain numbers + 0x80000001, >=0: major<<16|minor
}
String = { // .Net string format
Byte[] length // unsigned, encoded in 7 bit chunks, little endian, bit7 set in all but the last byte
Byte[length] // UTF8 encoded, 1 to 3 bytes per character, not 0 terminated
}
All integers little endian.
-----------------------------------------------
Calibration File (.cal)
Version 1
File = {
Byte 'C'
Byte 'a'
Byte 'l'
Byte 1 // version
Int32 count
Entry[count] entries
}
Entry = {
Int16 gx // raw acceleration sensor values
Int16 gy
Int16 gz
Int16 mx // raw magnetic field sensor values
Int16 my
Int16 mz
Byte group // group identifier: 0: no group, 1: A, 2: B
Byte valid // 0: ignored, 1: valid
}
All integers little endian.
In normal case all 'valid' bytes are 1 and the 'group' bytes are:
1,1,1,1,2,2,2,2,1,1,1,1,2,2,2,2,0,0,0,...,0
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