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Changes between Version 4 and Version 5 of FAQ/dsmdtm

v4	v5
3	3	A common product for users to create from LiDAR data is a Digital Surface Model (DSM), which represents the elevation at the top of buildings / forest canopy and a Digital Terrain Model (DTM) which is the 'bare Earth' elevation (i.e., it doesn't include the height of buildings or vegetation).
4	4
5		We supply a LiDAR DSM, including a version patched with a courser resolution elevation model (normally ASTER) for use in APL for processing hyperspectral data. However, we don't provide a DTM with standard deliveries.
	5	We supply a LiDAR DSM, including a version patched with a courser resolution elevation model (normally ASTER) for use in APL for processing hyperspectral data, using the procedure described [wiki:Help/LeicaLidarDems here]. However, we don't provide a DTM with standard deliveries.
6	6
7	7	There are a number of programs which can generate a DTM by classifying ground returns then interpolating to fill in gaps. If you are unsure where to start our DEM scripts have an interface for generating a DTM or DSM, which is able to use a number of software packages (some free some paid for). For more details see the following [https://github.com/pmlrsg/arsf_dem_scripts/blob/master/doc/source/tutorial_lidar.md#create-dsm--dtm-using-additional-programs tutorial] given as part of our NERC-ARF workshop (contact us for details on the next course).