Woolpert lidar processing
I took delivery of the full Woolpert dataset on 5/27/2016.
The delivered data included:
Folder | Filetypes | Description |
|---|---|---|
Bridge_Breaklines | ArcGIS .shp files | Location of major bridges |
Control | ArcGIS .shp files | Point locations of the control points used in the survey |
DEM_IMG | *.img | Digital Elevation images in 1km2 tiles |
DEM_IMG | *.img | Digital Surface images in 1km2 tiles |
Final_Report | Reports on the point cloud creation and control point collect | |
Intensity_Images | *.tif | Intensity images in 1km2 tiles |
LAS_1.4 | *.las | Classified lidar point cloud in 1 km2 tiles |
Metadata | *.xml | Metadata files for the processed data products. |
Swath_1.4 | *.las | Point cloud by flight line |
Tile_Index | ArcGIS .shp files | Shape files with location of the tiles and survey boundary. |
The final report:
and survey report:
I wanted to produce a suite of processed derivatives from the point cloud data. These include
Name | Data Type | Description | Completed | Date | Note |
|---|---|---|---|---|---|
wgew_laz | *.laz | Compressed *.laz file of the entire collection | 5/31/2016 | TBD | |
wgew_filtered | *.laz | Filtered statistical outliers, addition of 2015 NAIP RGB |
| Outliers were removed using PDAL statisticaloutlier and RGB color added using PDAL colorization | |
wgew_ground | *.laz | Compressed *.laz files of only the classified ground returns (~560 million points) | 5/31/2016 | Thes files have been re-formatted to LAS 1.2 and the EVLRs have been converted to VLRs by LAStools las2las | |
wgew_ground | *.tif | A merged 1 m DEM of the entire WGEW (derived from Points2Grid and PDAL) |
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wgew_hillshade | *.tif | A basic hillshade of the surface (180 degree azimuth, 40 degree sun angle). |
| Calculated in QGIS using GDAL. | |
wgew_relief | *.tif | A basic relief (colored) surface model |
| Calculated in QGIS, nice workflow here. | |
gridmetrics_30m | *.asc | FUSION GridMetrics for height above ground and intensity | 5/8/2016 | Description of files are here. | |
QAQC | *.html, *.jpeg |
| I calculated total point density between 8-12 ppsm, first return density between 4-8 ppsm | ||
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