Import a Greek PSYMO alignment

In Alignment Solver the import lands in the alignment that is open. If that alignment already has data, confirm the replacement. If nothing is open, the file opens as a new tab named after the file.

Horizontal — S01

Import > PSYMO Horizontal (S01)…

The file starts with the start chainage. The first and last PI lines are easting, northing and a name. Every PI between them also carries a radius and the spiral in and out:

StartChainage
Pi_X  Pi_Y  Pi_Name
Pi_X  Pi_Y  Radius  SpiralInValue  SpiralInParam  SpiralOutValue  SpiralOutParam  Pi_Name
Pi_X  Pi_Y  Pi_Name

The spiral parameter code is:

1. Length L
2. A parameter, with L = A² / R
3. Clothoid diversion ΔR, with L = √(24 · R · ΔR)
4. Length of a cubic parabola
5. Cubic-parabola diversion ΔR
6. Length of the tangent of a cubic parabola — not supported

Codes 4 and 5 are implemented, and the manual says they have not been checked against a real PSYMO sample. Treat a cubic parabola from a field S01 file with care until you have compared it with a known file.

Vertical and superelevation

Import > PSYMO Vertical (S02)… reads station, elevation, and a vertical-curve radius on the intermediate PVIs. The radius is converted to a curve length with L = R · |g_out − g_in|.

Import > PSYMO Superelevations (S03)… is two blocks of station and value (percent). The left side comes first, then a line 0 0, then the right side.

LandXML 1.2, including horizontal, vertical and station equations, is Import > LandXML….