Puget Sound Lidar Supermosiac

The second-draft 6-foot 2010 supermosaic! and with shaded relief! And fixed!

This differs from the first draft by the addition of data is Lewis, Gray's Harbor and Wahkiakum Counties, south of the Puget Sound basin.

The January 27, 2011 version fixes a serious problem with the July version. A strangely inappropriate (smoothed data used to fill pinholes?) version of the Snohomish 2005-6 data had been used in July, and so it was overwritten.

A filegeodatebase is a directory with many (84 in this case) files of various sizes. Some of these files are larger than 4 gigabytes, and will break the compression program. Therefore you must

download the 30,914,639-byte zipped filegeodatabase When you uncompress it,you will have the directory supermosaic.gdb containing 82 files.
Download the 39,691,380,853-byte a00000029.gdbtable INTO the supermosaic.gdb directory.
Download the 9,218,000,505-byte a00000034.gdbtable INTO the supermosaic.gdb directory.

You will need ArcMap 9.3 or equivalent software to use it. This does not comprise all the PSLC holdings, but is cut off at the Cascade Crest and arbitrarily around the bottom of Lewis County. Aside from having 6-foot postings (matching the resolution of most of the component dta sets), it should be a minor improvement over the March 10, 2010 30-foot filegeodatabase. A better (I hope) rasterization of the King County data in coming soon, and this supermosaic will be updated. I am not aware of new lidar aquisitions in the pipeline. Components, from highest precedence to lowest are:
A map version of this table is coming soon.
Yeah, right. Hey, kids, find 7 errors in the following table and win fifth prize!

location	date	agency	vendor	resolution	original projection	VDATUM	link	comment
Snohomish County	2005-6	Sno County		6 foot	State Plane North NAD83	NAVD1988	filegeodatabase and tiles	This layer should be near the bottom of the list, but it had to be recopied on the top (overwriting some more accurate data in places) because in was improperly processed the first time.
Quinault River above Lake Quinault	2002	Bureau of Reclamation/Quinault Tribe	Horizons, Inc.	2 meter	UTM zone 10 NAD83		PSLC	This will be part of the next version.
South Washington Coast	2009	FEMA/Oregon LiDAR Consortium	Watershed Sciences	1 meter	UTM zone 10 NAD83	NAVD88 Geoid03	PSLC	This will be part of the next version.
Snohomish River Estuary	2009	PSLC		3 foot	State Plane North NAD83 HARN	NAVD1988 Geoid03	PSLC	.
Lewis County 2009	[2008/] 2009	PSLC	Watershed Sciences	3 foot	State Plane North NAD83 HARN	NAVD1988	PSLC	This project was overlooked on the June supermosaic, but added in the July 2, 2010 version.
Kitsap County 2000	2000	PSLC		6 foot	State Plane North NAD83 HARN	NAVD1988	PSLC	Overlooked part of Puget Sound Lowlands data.
Olympic Peninsula	2005	Clallam County/DNR/DOT		6 foot	State Plane North NAD83 HARN	NAVD1988	PSLC	.
N Fork Skykomish River	2009	PSLC		2 foot	State Plane North NAD83 HARN	NAVD1988	Snohomish County	This project is not incorporated into the 30-foot mosaic.
Elwha	June, 2009	?	Entrix	6 foot	State Plane North NAD83 HARN	NAVD1988	(local)
Sauk	April, 2005	DNR/Skagit County	Terrapoint	6 foot	State Plane North NAD83	NAVD1988	report, local copy of data	The report describes the north half.
Greenwater/White	2007	WaDOT		3 foot	State Plane North NAD83	NAVD1988	all data filegeodatabase	not to be confused with DOT projects on SR401 in Yakima county.
Mount Rainier National Park	2009?	NPS		1 meter	UTM NAD83		filegeodatabase
Lewis County	2006	PSLC	Watershed Sciences	3 foot	State Plane South NAD83	NAVD1988	tiles filegeodatabase
San Juan Islands	2008?	PSLC		3 foot	State Plane North NAD83	NAVD1988	tiles filegeodatabase	with Lummi Island and Pt. Roberts
Skagit River/Bacon Creek	2005	PSLC		6 foot	State Plane North NAD83	NAVD1988	tiles filegeodatabase	Sauk to Marblemount, plus lower Bacon Creek
bits near Skagit delta	2005	Skagit Environmental Bank		6 foot	State Plane North NAD83	NAVD1988	filegeodatabase
Clallam	2005	PSLC		6 foot	State Plane North NAD83	NAVD1988	filegeodatabase
Puget Sound Lowlands	2000-2005	PSLC		6 foot	State Plane North NAD83	NAVD1988	tiles	These PSLC tiles are not broken down by project/year.
Lewis County	2005 (winter of 2004-5)	PSLC		6 foot	State Plane South NAD83 HARN	NAVD1988	PSLC	(with parts of Lower Columbia 2005)
Skykomish		Sno County		6 foot	State Plane North NAD83	NAVD1988	e00	Overlaps Snoqualmie survey, extending higher
Snoqualmie		Sno County		6 foot	State Plane North NAD83	NAVD1988	e00	to King County line
King County		King County		6 foot	State Plane North NAD83	NAVD1988	tiles	Includes SW Snohomish County and Puget Sound bathymetry
Darrington	2003?	NASA/USGS	terrapoint	6 foot	State Plane North NAD83	NAVD1988	filegeodatabase NASA	North Fork Stillaguamish
Whatcom/Skagit	2006	USGS	Sanborn	6 foot	State Plane North NAD83	NAVD1988	filegeodatabase tiles, LAS, metadata	aka North Puget Sound
West of Rainier	2006	NASA/USGS	terrapoint	6 foot	State Plane North NAD83	NAVD1988	filegeodatabase and links

Notes:

These note are under construction.
There are issues in mosaicking multiple projects.
The 6-foot supermosaic covers slightly more area than the 30-foot version.
We are grateful that we can now redistribute King County data.
The King County dataset includes non-LiDAR bathymetry.
We may issue a revised version of the King County dataset.
This dataset is in State Plane North, NAD83 with HARN adjustments.
As this projection covers the width of the state, you see that grid north leans west of true north.
The vertical datum is North American Vertical Datum of 1988
We need to doublecheck the vertical datum of all components.
The statistics show an odd maximum elevation. It is actually greater than 14000 feet.
Blue-green LiDAR is not yet included.
Shorelines are a problem, as LiDAR captures the water surface. It is a largely manually process the estimate the water level at the moment a swath was flown and to filter out the water. We have a samll start (not evident in this data relesae.)
Anybody have more LiDAR DEMs for this area to share?
All comments and suggestions are welcome.
This is the bare earth DEM. We may not get around to a first-return DEM, partly because we lack first return data for all components.
When we are happy with this, we will work with Oceanography to update the Puget Sound topography/bathymetry composite

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Puget Sound Lidar Supermosiac

The second-draft 6-foot 2010 supermosaic! and with shaded relief! And fixed!

Technical Assistance

This page maintained by PSLC webmaster

This page maintained by PSLC webmaster