Changes between Version 2 and Version 3 of FAQ/las2ascii

Timestamp:

Nov 26, 2015, 3:27:13 PM (9 years ago)

Author:

dac

Comment:

--

FAQ/las2ascii

@@ -1 +1 @@
 === Q: How do I convert between LAS and ASCII file formats? ===
 
-To convert between LAS and ASCII formats use the free `las2txt` and `txt2las` tools available as part of LAStools. These are available to download from: https://github.com/LAStools/LAStools (note: download also contains paid for tools not required for conversion). Binaries are provided for Windows. For Linux and OS X you need to compile using the included 'Makefile'
+To convert between LAS and ASCII point cloud formats use the free `las2txt` and `txt2las` tools available as part of LAStools. These are available to download from: https://github.com/LAStools/LAStools (note: download also contains paid for tools not required for conversion). Binaries are provided for Windows. For Linux and OS X you need to compile using the included 'Makefile'
 
 ==== LAS to ASCII ====
@@ -35 +35 @@
 To reduce the file size you can change the extension of the output file to '.laz' to save as LASzip files. These can be read by a number of packages and easily converted back to uncompressed LAS files using [https://github.com/LAStools/LAStools/blob/master/bin/laszip_README.txt laszip].
 
-If you are accessing ARSF archive data LAStools are available on [http://jasmin.ac.uk/ JASMIN] and can be loaded using:
+==== Converting on the JASMIN platform ====
+
+If you are accessing ARSF data archived at [http://neodc.nerc.ac.uk/ NEODC] and have an account on [http://jasmin.ac.uk/ JASMIN] LAStools are installed and can be loaded using:
 
 {{{
@@ -41 +43 @@
 }}}
 
-Allowing data to be converted to LAS/LAZ format before downloading. 
+If you have access to the ARSF archive it will be mapped as `/neodc/arsf` allowing you to convert ASCII files to LAZ before downloading.
+
+==== Gridded ASCII format ====
+
+If you need to save as a gridded ASCII format (.asc) rather than a point cloud you can use the [https://github.com/pmlrsg/arsf_dem_scripts ARSF DEM Scripts] to export as ENVI format and then convert to ASCII using [http://www.gdal.org/gdal_translate.html gdal_translate] for example:
+
+{{{
+las_to_dsm.py in_las.las -o out_raster.dem
+
+gdal_translate -of AAIGrid out_raster.dem out_raster.asc
+}}} 
 
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