XYZRGB to LAS (and ultimately to geoTIFF or KMZ)

[Sandra Bond]

I have a XYZRGB color map (UTM) and I am trying to convert it to something I can use to plot in Google Earth.

I've tried the txt2las tool (to put it into LAS format and ultimately into geoTIFF/kmz), but I always get: Warning: written 18508377 points but expected 0 points and the file appears empty.

I am not sure if I am missing a setting or something.

Does anybody have any clues?

Thanks so much.

Sandra

[Martin Isenburg]

Hello Sandra,

It would help if you could include a small sample (20 to 50 lines of ASCII) as well as the exact txt2las command line that you have been using.

http://rapidlasso.com/txt2las

http://lastools.org/download/txt2las_README.txt

The control output that txt2las has given you in the console:

WARNING: written 18508377 points but expected 0 points

is exactly what is expected. The LASlib library upon which LAStools is based always warns when there is a discrepancy between the number of points that were written into the LAS header upon opening and the actual number of points written. 

Regards,

Martin @rapidlasso

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[Bond, Sandra]

I was finally  able to produce the *las file and see it in the preview. 
This is what my file looks like. I've been trying to bring it into ArcGIS, but I am having trouble reading the *las file. It might be the 'odd' projection (it's raw GPS data for the xyz).

-2647883.283100 -4277132.615688 -0.785700 204 204 204

-2647883.238102 -4277132.637203 -0.787301 204 204 204

-2647883.192799 -4277132.658596 -0.789000 204 204 204

-2647883.147801 -4277132.679989 -0.790600 204 204 204

-2647883.102597 -4277132.701412 -0.792201 204 204 204

-2647883.057400 -4277132.722896 -0.793801 204 204 204

-2647883.012303 -4277132.744289 -0.795300 204 204 204

-2647882.967099 -4277132.765804 -0.796799 204 204 204

-2647882.922001 -4277132.787197 -0.798199 204 204 204

Thank you,

Sandra

--

Sandra Bond

Geographer/LiDAR analyst

U.S. Geological Survey

Placer Hall, CSUS

6000 J Street

Sacramento, CA 95819

ph: (916) 278-3031

fax: (916) 278-9536

email: sb...@usgs.gov