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Graphical: https://coast.noaa.gov/dataviewer/?#/lidar/search/
- Switch to street view
- Zoom in to the area
- Use blue pencil icon, and outline the
box you want
- Insure you are getting elevation data.
The Landcover might be higher resolution
than the 30 m NLCD
in some areas. I have not tried to get
imagery, but in some places they appear to
have NAIP.
- Add data sets to the cart. Insure
you only get ones that say LIDAR if you want
the point clouds, and not
those that say DEM unless you are sure that
is what you want. You can create the
DTM or DSM from the point cloud.
- If the files are too large, restrict the
area. With lidar you should be looking
at small areas in great detail.
- Go to the cart
- Hit next
Bulk download takes you to a page with
options, but it will be less convenient than
going through the cart.
Projects list:
http://coast.noaa.gov/dataviewer/?dataregistry/#/coastallidar
has descriptions of the layers, and
you can download from the description.
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Suggested settings on checkout:
- Get the point cloud for
flexibility; you can
create a
grid in MICRODEM from the point
cloud. If you do
want a grid, get "Raster: as the
output product, and pick the 32
bit Geotiff. You could
also have picked the DEM in the
previous step when you picked
data sets.
- Get everything in meters.
- Get NAD83. If you get
WGS84, the vertical datum will
be WGS84/ITRF94 Ellispsoid,
which will probably not be
useful.
- Get LAZ for files that
are easier to deal with; they
will come zipped. Get LAZ for files about 10%
the size of the uncompressed LAS
and will be somewhat smaller
than the zipped LAS. You
can
Decompress
after download, but you will have to get the
LAStools decompressor
for LAZ file and place it in the
correct directory.
- Get all data classes.
This setting is not sticky, and
you have to pick it for every
data set.
- Copy choices from
one dataset to another
by highlighting the second data
set on the left, and then using the
drop down box in the upper right.
Check very carefully that all settings are
correctly set (we have had issues
with the data classes having to
be set for every dataset).
- Do not hit Next
until all choices are set for
all data sets.
There is no back button on the
next screen.
You will get an email when the data is ready.
Problems with
download?
When you download, put each data set in its
own directory, and carefully name it (no spaces).
- There may be laz files in the zip when
you unzip. The are double compressing
to keep the lidar data with its metadata, a
text file and a shapefile.
- You can
uncompress all the laz files, in
multiple directories, with a single command
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