Tops section to extract

[martik617]

Thank you for such a handy tool to read las files in R.
I have formation tops in my las files and wondered if it's possible to extract this section.

~Tops
#TOPS NAME DEPTH:
CARDIUM FM 1696.0:
CARDIUM SD 1712.7:
KASKAPAU FM 1737.4:
DUNVEGAN FM 2019.2:
SHAFTESBURY FM 2047.4:
BASE FISH SCALES MARKER 2135.1:
PEACE RIVER FM 2177.0:
CADOTTE MBR 2213.8:
HARMON MBR 2248.7:
SPIRIT RIVER FM 2286.3:
BLUESKY FM 2531.3:
GETHING FM 2549.9:
CADOMIN FM 2650.6:
FERNIE GRP 2657.6:
NORDEGG MBR 2699.1:
MONTNEY FM 2724.0:
BELLOY FM 2856.9:
DEBOLT FM 2878.6:
SHUNDA FM 2978.6:
PEKISKO FM 3065.9:
BANFF FM 3115.9:
WABAMUN GRP 3328.0:
WINTERBURN GRP 3562.2:
DUVERNAY FM 4085.5:
~Curve Information Block

[donald-keighley]

Unfortunately you have a non standard LAS file. Tops can be stored in a LAS 3.0 file but they are supposed to look like the other data sections. Its described on pages 21 and 22 here:

https://cwls.org/wp-content/uploads/2014/09/LAS_3_File_Structure.pdf

So, you'd have to write something special for your case.