Friday, February 14, 2014

Addison County LiDAR Point Density by Land Cover Class

After a bit of a delay due to the government shutdown the Addison County LiDAR is here!  I just finished processing the raster surface models, and after they are checked by the good folks at VCGI they will be made available to the general public

I thought it would be interesting to do a quick analysis of point density by land cover class.  For land cover data I used the NLCD 2006 product.  For each land cover class in Addison County I computed the total area of the land cover class, the mean LiDAR point density, and the standard deviation of the LiDAR point density.

Addison is a rural county, so not surprisingly the area totals are the greatest for the agricultural and forest classes.  Mean point density and the standard deviation for the point density is highest in the forest classes, which makes sense given the complex vertical structure of forests relative to the other classes.

This work was funded by a grant from AmericaView to the VermontView consortium.

Figure 1. NLCD 2006 for a portion of Addison County
Figure 2.  Point density, summarized using 5 meter grid cells for the same location as in Figure 1.  The presence of overlapping areas is clearly visible as they have higher point densities.
Figure 3. Point density statistics summarize by land cover class.

1 comment:

darshana patel said...

It’s really very important information on lidar survey, Thank you so much for your valuable time to write this important information for us.