2014 Stillaguamish LiDAR, Including Oso
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The Washington Department of Transportation LiDAR is now freely available,
and this web site is under development.
previous 2014 landslide web site did not contain actual 2014 data.
(But it may be the best place to look for maps.)
Data was sent to us at the beginning of 2015 from the wsdot GeoMetrix office.
We will start with the final product, and later see if the intermediate products
Compressed las point files
are available by tile.
We will try distributing the DEM as a filegeodatabase
(7,280,707,041 bytes), and will create tiles
if there is a strong demand for tiled data.
A compressed filegeodatabase contains:
|be||bare_earth digital elevation model|
|hh||highest hit digital elevation model, showing vegetation|
|behsnw||shaded relief image of bare earth, lit from the northwest|
|hhhsnw||shaded relief image of highest-hit, lit from the northwest|
|intensity||brightness of the lidar return.|
- LiDAR surveys include the surface of the land and the surface of the water.
The actual waterline depends on the water level at the moment that the aircraft
passes, and is not easily determined.
- When the river was partially dammed after the 2014 landslide, sonar
bathymetry was acquired for the impounded water. That bathymetry is not
incorporated in this DEM.
- Shaded relief pyramids were built with bininear resampling. This is not
the default, but it is the only reasonable option for shaded relief.
Vendor's Technical Data Report