Ahojte, 
hram sa s lidar datami a mam trosku problem. neviem ci som sa dostal na obmedzenie therionu alebo robim nieco zle. 

vstupne data som mal stvorec 
48.99146, 19.67295
    48.98282, 19.68312
vo formate tif, ktory som konvertoval cez gdal na txt - ArcInfo Asci Grid

gdal_translate -of AAIGrid zlomiska.tif zlomiska-povrch.txt
cez gdalinfo som zobrazil  taketo hodnoty:

Driver: GTiff/GeoTIFF
Files: DMR_Zlomiska.tif
Size is 1118, 2310
Coordinate System is:
PROJCS["WGS 84 / UTM zone 34N",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",21],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","32634"]]
Origin = (403129.719999999972060,5427465.219999999739230)
Pixel Size = (0.500000000000000,-0.500000000000000)
Metadata:
  AREA_OR_POINT=Area
  DataType=Generic
Image Structure Metadata:
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (  403129.720, 5427465.220) ( 19d40'32.80"E, 48d59'32.95"N)
Lower Left  (  403129.720, 5426310.220) ( 19d40'33.79"E, 48d58'55.55"N)
Upper Right (  403688.720, 5427465.220) ( 19d41' 0.30"E, 48d59'33.26"N)
Lower Right (  403688.720, 5426310.220) ( 19d41' 1.29"E, 48d58'55.87"N)
Center      (  403409.220, 5426887.720) ( 19d40'47.05"E, 48d59'14.41"N)
Band 1 Block=1118x1 Type=Float32, ColorInterp=Gray


z nich som sa pokusil vytvorit surface.th. 

encoding  utf-8
surface
  cs utm34
    grid 403129.72 5426310.22 0.5 0.5 1118 2310
  input zlomiska-povrch.txt
endsurface

netusim ci mam spravny grid, tak ak sa dakto do toho vyzna prosim skontrolujte pretoze pri kompilacii dostanem chybu..

error -- lidar/zlomiska-povrch.txt [7] -- line too long
writing xtherion file ... done

7- je riadok kde zacinaju vyskove data..(riadkov je 2310 )

S pozdravom

Ing. Michal Danko