2015 FEMA Lidar: Michigan Part 2 (Alger, Benzie, Delta, Grand Traverse, Leelanau, Mackinac, Manistee Counties) Point Cloud files with Orthometric Vertical Datum North American Vertical Datum of 1988 (NAVD88) using GEOID18

Below are links to the files that make up the 2015 FEMA Lidar: Michigan Part 2 (Alger, Benzie, Delta, Grand Traverse, Leelanau, Mackinac, Manistee Counties) dataset in an orthometric vertical datum North American Vertical Datum of 1988 (NAVD88) using GEOID18. This HTML file is here to emulate the access you would have gotten through an ftp site. The files containing geospatial indices, metadata, etc., are listed first, followed by the files. To download in bulk, it is suggested you use a program such as wget (example below). The geospatial index file in shapefile format also has a URL attribute that some GIS programs can use to download files. You can also subset the data, make derived products, and change projection, datum, etc., using the Digital Coast Data Access Viewer (add to cart, the link to bulk download or LAZ fmt will take you here).

The files are in LAZ format, a lossless compressed version of the ASPRS LAS format. The compression and decompression is done with the free and open source 'laszip' program available at http://laszip.org. This is not the same as the more general zip format. Many geospatial programs will read LAZ files natively and decompression is often not necessary. There is a list of software with native support on the laszip site.

Example to download entire data set using wget (note: sufficiently new and trusted pre-compiled Windows versions can be hard to find):
wget -np -r -nH -L --cut-dirs=2 https://chs.coast.noaa.gov/htdata/lidar3_z/geoid18/data/8735/
This will give you the directory structure starting with geoid18. Modify the --cut-dirs=2 argument to modify the start directory (e.g. --cut-dirs=4 will start at 8735). Wget is a command-line program and the output will be to the directory you run it in. More options and information can be found at http://www.gnu.org/software/wget/manual/wget.html. The other options in the example mean:


If you have problems with wget that look like an authorization or certificate issue, you may need to add the option "--no-check-certificate". Windows users may want to install the Windows Subsystem for Linux to get a current wget.

You can also use the uGet program with the list of URLs in file urllist8735.txt. Several posts on the GeoZone blog provide help with downloading, including:

The total size to download all the files is 453G. There are 24835 LAZ files and the summary class table is:
Class NumberClass NamePoints
0Never Classified405
1Unclassified35499264152
2Ground27861551865
3Low Vegetation10
4Medium Vegetation59
5High Vegetation7
6Building8
7Low Point (noise)22719771
8Model Key Point8
9Water1897117192
10Ignored Ground (near breakline)9487734
11Withheld24356213973
12Overlap9
13Bridge Deck10
1411
1594
1635
1717
1875
1913
2012
2111
226
2320
2426
259
266
278
285
2910
3034
31142

If you need FTP access instead of HTTPS, use ftp://ftp.coast.noaa.gov/pub/DigitalCoast/lidar3_z/geoid18/data/8735

Georeferencing Note

You may find the georeferencing on the files refers to generic NAD83 (EPSG code 4269). All files, with the exception of the few in WGS84, are in a more recent realization of NAD83 such as NAD83(CORS96), NAD83(HARN), NAD83(NSRS2007), or NAD83(2011).

Meta Info

Tile Index: tileindex.zip (Shapefile)
                mi2015_part2_index.gpkg (GeoPackage)
Metadata: mi2015_part2_metadata.xml
Metadata: mi2015_part2_metadata.html
XYZ range table: mi2015_part2_minmax.csv
README: 0README.txt (contains similar information to above)
URL List: urllist8735.txt is a list of all the URLs for batch downloading.

Supplemental Info

supplemental/Final_Report_Michigan_LiDAR_2015.docx
supplemental/index.html
supplemental/mi2015_part2_m8735.kmz

Breakline Files

breaklines/Alger_Breaklines.zip
breaklines/Benzie_Breaklines.zip
breaklines/Delta_Breaklines.zip
breaklines/Grand_Traverse_Breaklines.zip
breaklines/Leelanau_Breaklines.zip
breaklines/Mackinac_Breaklines.zip
breaklines/Manistee_Breaklines.zip
breaklines/Michigan_LiDAR_2015_Alger_Hydro.xml
breaklines/Michigan_LiDAR_2015_Delta_Hydro.xml
breaklines/Michigan_LiDAR_2015_Mackinac_Hydro.xml
breaklines/README_breaklines_m8735.txt
breaklines/index.html

Point Clouds

Subdirectories

alger
benzie
delta
grand_traverse
leelanau
mackinac
manistee

This page is owned by the NOAA Office for Coastal Management and was created by an automated script on Fri Sep 3 07:27:54 EDT 2021