CZO Quality Report: Southern Sierra Area 5 Snow On (Soaproot Saddle)
This report includes the quality of pre-processed Lidar data given by NCALM. Areas of quality covered by
this document include completeness of the Lidar data compared to the proposed study area (Area), the
average points per square meter for each tile (Point Density) and detailed point density of the entire site
(Detailed Point Density), overall point return intensity of the site (Intensity), visual inspection of the
hillshade digital elevation model (Hillshade) and the attributes included in the Lidar data.
Area
Proposed area given by the CZO team is displayed in green in the image below. Actual area that the
Lidar flight covered is displayed in blue. Percentage of proposed area falling in actual area is given below
image.
100% of proposed area falls in Lidar Flight
Tile point density
Individual LAS tiles for CZO site are displayed in the image below. The Gradient color for each tile
represents the average number of points per square meter (see legend for color explanation). The tile ID
and average points per square meter are displayed on each tile. Refer to the LAS tile index at the end of
this document for tile LAS filename corresponding to the tile ID.
Average points per square meter for entire site
The average points per square meter for the entire CZO site are displayed below. Refer to the LAS Tile
Index at the end of this document for individual tile average points per square meter.
CZO site average point density = 10.86735 points per square meter.
Detailed Point Density
A detailed point density image is displayed below based on a one meter resolution. A pixel’s color
saturation corresponds to how many return points are contained in the area a pixel represents. The
gradient color ranging from near black (the absence of green) represents 1 point contained in a pixel to
absolute green representing 20 points in a pixel. Please note that the color white represent 0 points in a
given pixel.
Intensity
A point return intensity image is displayed below based on a one meter resolution. A pixel’s color
saturation corresponds to the average intensity given by the points contained in that pixel. The gradient
color ranging from near black (the absence of cyan) represents almost 0 percent intensity value of a
pixel to cyan representing 100 percent.
Hillshade
The Digital elevation model is displayed in the image below using hillshading. Overall visual inspection
quality is given below image being classified as good or poor.
Visual Inspection: Good
Included Attributes
Below is a list of the attributes given by LAS file format and whether they have been found to be
included in the flight of this CZO site.
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X positions:
Y positions:
Z positions:
Intensity:
Return Number:
Number of Returns:
Scan Direction Flag:
Edge of Flight Line:
Classification:
Scan Angle Rank:
User Data:
Point Source ID:
GPS Time:
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Processing Errors
Below is the list of tiles that experienced an error while processing, the reason for the error and if it was
still included in this report.
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No errors found.
LAS tile Index
LAS tile index list includes tile ID (ID), filename (tile), total points (totpts), maximum x (xmax), minimum x
(xmin), maximum y (ymax), minimum y (ymin), maximum elevation (zmax), minimum elevation (zmin),
average elevation (zavg) and points per square meter (pt/m^2) for each tile. The last entry of the index
gives the overall tile summary where total points represents all points for entire site, maximum x, y and
z represents the maximum x, y, and z for entire site respectively, minimum x, y, elevation represents the
minimum x, y, elevation for entire site respectively, average elevation represents overall average
elevation for site and points per square meter represents the average points per square meter of entire
site.
ID
tile
totpts
xmax
xmin
ymax
ymin
zmax
zmin
zavg
pt/m^2
1
area5_pt000001.las
2339254
297000
296090.8
4101411
4101000
1407.83
1314.57
1343.574
7.769584
2
area5_pt000002.las
4544750
298000
297000
4101522
4101000
1412.14
1209.87
1324.274
10.75285
3
area5_pt000003.las
5456262
299000
298000
4101531
4101000
1327.29
1084.74
1199.427
11.01009
4
area5_pt000004.las
6417401
300000
299000
4101666
4101000
1220.85
1004.6
1126.45
11.13487
5
area5_pt000005.las
1494890
300446.3
300000
4101842
4101000
1171.22
999.51
1089.647
7.867974
6
area5_pt000006.las
5533546
297000
296066.1
4101000
4100000
1441.64
1290.52
1352.452
11.1547
7
area5_pt000007.las
11848985
298000
297000
4101000
4100000
1399.66
1237.19
1309.868
12.05311
8
area5_pt000008.las
12723188
299000
298000
4101000
4100000
1321.69
1092.94
1205.237
12.85934
9
area5_pt000009.las
12839153
300000
299000
4101000
4100000
1246.65
1090.82
1175.533
12.86177
10
area5_pt000010.las
6549268
300678.5
300000
4101000
4100000
1560.69
1065.01
1179.933
11.20923
69746697
300678.5
296066.1
4101842
4100000
1560.69
999.51
1230.639
10.86735
Overall*
*Overall consists of total points for all tiles, maximum of x, y, z maximum values, minimum of x, y, z minimum
values, overall z average and average points per square meter for all tiles.