I am a first time GRASS user working on a project through the Department of Transportation. We're trying to visualize LiDAR data we have collected from a particular segment of roadway so that we can better analyze and present our finding to the DoT, and I have been encountering some issues following the tutorial found <a href="http://grass.osgeo.org/wiki/LIDAR">here</a>.<div>
<br></div><div>When using the Serpent Mound data available from this site as well as my own data, I start encountering problems while attempting to use the g.region command. It says that n= *max x* etc is an invalid input. I think this is because the g.region is stuck on LAT/LON units for this, however trying to use the LAT/LON from my own data has not worked either, and I do not know how to access the LAT/LON data for the Serpent Mound set.</div>
<div><br></div><div>How do I make the program accept my g.region inputs?</div><div><br></div><div>I tried to move on with the other commands despite g.region not working, and encountered more issues. When I inputted the r.in.xyz (....) command it said "Reading data...." but when I tried r.colors it said "ERROR: Bad y-coordinate line 1 column 2"</div>
<div><br></div><div>My ultimate goal for right now is to replicate <a href="http://grass.osgeo.org/wiki/File:LAS_serpent_nviz.jpg">these results</a> with my own data. After that we would like to experiment further with the advanced capabilities of the program, but a colored visualization of the data would be great for right now.</div>
<div><br></div><div>Thanks in advance!</div><div><br></div><div>Patrick</div>