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Up Topic Discussions / LiDAR Support / Fine-tuning canopy DSM's
- - By ? Date 2013-01-02 21:30
I would be interested in hearing about other people's experiences generating and displaying first-return canopy surface DSM's.

I have been trying a number of methods and have been fairly pleased with this:
LAS to Multipoint (selecting first return only and average spacing from LAS metadata), then
Point to Raster (for metro-area tiles I have gone as low as 1-Meter cell size), then
One round of Post-processing the raster to remove some of the NoValue cells (focal mean) using Raster Calculator

Finally, generating a hillshade and displaying it with bilinear interpolation.

There appears to be a tradeoff between increased resolution and increased No Value cells.  Have other people been achieving good canopy representations using different techniques?

Thanks
Reply
Parent - By ckirschbaum Date 2013-01-15 17:27
See this discussion and email me if you want more info.
http://www.mngeo.state.mn.us/cgi-bin/LiDAR/topic_show.pl?tid=5

Chad Kirschbaum
ckirschbaum@fs.fed.us
Up Topic Discussions / LiDAR Support / Fine-tuning canopy DSM's

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