Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
2012
NOAA Coastal Services Center Coastal Inundation Digital Elevation Model: Portland WFO (WA)
Raster
Charleston, SC
NOAA's Ocean Service, Coastal Services Center (CSC)
This digital elevation model (DEM) is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Coastal
Services Center's Sea Level Rise and Coastal Flooding Impacts Viewer. The DEM includes 'best available' lidar data known to exist at the
time of DEM creation that meets project specifications for those counties in the state of Washington that fall within the boundary of the
Portland, OR Weather Forecast Office (WFO), as defined by the NOAA National Weather Service. The DEM is derived from multiple LiDAR datasets
collected between 2002 and 2010 for NOAA, the United States Army Corps of Engineers (USACE) and the United States Geological Survey (USGS).
The extent of the DEM includes portions of Pacific, Wahkiakum, Cowlitz, Clark and Skamania counties. Hydrographic breaklines used in the
creation of the DEM were either delineated using LiDAR intensity imagery or obtained from USACE. The DEMs are hydro flattened such that
water elevations are less than or equal to 0 meters.
The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88) with vertical units of meters and horizontally to
the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 5 meters.
The NOAA Coastal Services Center has developed high-resolution digital elevation models (DEMs) for use in the Center's Sea Level Rise And
Coastal Flooding Impacts internet mapping application. These DEMs serve as source datasets used to derive data to visualize the impacts of
inundation resulting from sea level rise along the coastal United States and its territories.
Some of the datasets used in the creation of the DEM are publicly available via the NOAA Coastal Services Center's Digital Access Viewer.
Further information regarding these datasets can be accessed using the following url's:
Pacific County: http://csc.noaa.gov/dataviewer/webfiles/metadata/willapa2002_template.html
All counties: http://csc.noaa.gov/dataviewer/webfiles/metadata/or2010_usace_columbia_river_template.html
Additional information regarding USGS LiDAR data used in the creation of the DEM can be found here:
USGS Center for LiDAR Information Coordination and Knowledge: http://lidar.cr.usgs.gov/
2002
2010
ground condition
None planned
-124.182535581
-121.513450581
46.7952256046
45.5426056046
ISO 19115 Topic Category
elevation
None
Bathymetry/Topography
elevation
Digital Elevation Model
DEM
lidar
inundation
flooding
lidar
topography
sea level rise
None
US
Washington
Pacific County
Wahkiakum County
Cowlitz County
Clark County
Skamania County
None
The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire
risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a
planning reference and not for navigation, permitting, or other legal purposes.
Acknowledgment of the NOAA Coastal Services Center as a data source would be appreciated in products developed from these data, and such
acknowledgment as is standard for citation and legal practices for data source is expected.
Data covers the project area, defined as the WFO boundary. Elevation data checked for anomalogous elevation
values outside expected range.
A visual qualitative check was performed to ensure data completeness. All available lidar data known at the time of DEM creation that meets
project specifications has been used to develop the DEM. Known data gaps may exist where lidar coverage was incomplete.
The DEM is derived from the source lidar data. Horizontal accuracy testing is not performed on the DEM. Lidar source data assumed to
meet 1 meter horizontal accuracy.
The DEM is derived from the source lidar data. Vertical accuracy is not tested on the DEM. Project specifications require all source
lidar data used in constructing the DEM to meet FEMA Specifications for Flood Hazard Mapping.
NOAA Coastal Services Center
2012
NOAA CSC lidar data holdings
http://www.csc.noaa.gov/dataviewer
http://csc.noaa.gov/dataviewer/webfiles/metadata/willapa2002_template.html
http://csc.noaa.gov/dataviewer/webfiles/metadata/or2010_usace_columbia_river_template.html
online digital data
2002
2010
ground condition
CSC lidar
LiDAR datatsets contributed by the NOAA Coastal Services Center in the creation of the Seattle WFO DEMs include:
Pacific County- 2002 NOAA Willapa Bay LiDAR
All counties- 2010 USACE Columbia River LiDAR
USGS Center for LiDAR Information Coordination and Knowledge
2004
USGS CLICK lidar data holdings
http://lidar.cr.usgs.gov/
online digital data
2004
ground condition
USGS CLICK lidar
LiDAR datatsets contributed by the USGS in the creation of the Seattle WFO DEMs:
Very small portions of Pacific, Wahkiakum and Cowlitz counties- 2004 Lower Columbia River
1. Lidar source data and hydrographic breaklines were obtained and imported into an ESRI ArcGIS file geodatabase for each constituent county
within the WFO boundary. Only ground classified lidar (Class 2) points were used to reflect a bare earth surface. Hydrographic features
were assigned elevation values at or below 0 meters. An ESRI Terrain was then generated from these source data.
2. The ESRI Terrain was converted to a DEM (Erdas Imagine .img file format) with a cell size of 3 meters. The DEM was reviewed in Global
Mapper for incorrect elevations and artifacts introduced from source inputs or during the raster creation process. Corrections were applied
to the DEM and reprocessed for further review.
3. All DEMs for the entire study area (WFO) were loaded into Global Mapper for a final review. The constituent DEMs were then checked to
ensure complete coverage within the study area and that no issues existed along the boundary between adjacent DEMs. Once it was determined all
DEMs were seamlessly edge-matched and no other artifacts were present, the constituent DEMs were mosaiced together, resampled to 5m
and reprojected to the NAD83 geographic coordinate system.
CSC lidar
USGS CLICK lidar
2012
Raster
Grid Cell
27836
59313
1
0.0000001
0.0000001
Decimal degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222101
North American Vertical Datum of 1988
0.001
meters
Explicit elevation coordinate included with horizontal coordinates
NOAA Coastal Services Center
mailing and physical
2234 South Hobson Ave.
Charleston
SC
29405-2413
843-740-1200
csc.info@noaa.gov
For questions please use the form at http://www.csc.noaa.gov/contact/contactForm.htm
Downloadable Data
Any conclusions drawn from the analysis of this information are not the responsibility of the the Coastal Services Center
or its partners.
2012
NOAA Coastal Services Center
mailing and physical
2234 South Hobson Avenue
Charleston
SC
29405-2413
843-740-1200
csc.info@noaa.gov
For questions please use the form at http://www.csc.noaa.gov/contact/contactForm.htm
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998