Data Set
NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model: Guam Weather Forecast Office (GUM WFO) - Saipan, Commonwealth of Northern
Mariana Islands (CNMI)
CNMI SLR DEM m9065
47844
201304
Complete
These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise (slr) and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: http://www.coast.noaa.gov/slr
This digital elevation model (DEM) is part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. The DEM created for this project was developed using the NOAA National Weather Service's Weather Forecast Office (WFO) boundaries. This DEM falls in the Guam (GUM) WFO and shows the elevation data for the island of Saipan, in the Commonwealth of Northern Mariana Islands (CNMI). This DEM includes the best available lidar data known to exist at the time of DEM creation that met project specifications, for the island of Saipan.
This DEM is derived from 2007 United States Army Corps of Engineers (USACE) lidar. Hydrographic breaklines were delineated using lidar intensity imagery generated from the lidar. The final DEM is hydro flattened such that water elevations are less than or equal to 0 meters.
The DEM is referenced vertically to the Northern Marianas Vertical Datum of 2003 (NMVD03) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 3 meters.
The NOAA Office for Coastal Management 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.
The dataset used to construct this DEM is publicly available via the NOAA Office for Coastal Management's Digital Access Viewer at this URL:
http://www.coast.noaa.gov/dataviewer/index.html?action=advsearch&qType=in&qFld=ID&qVal=561
Theme
ISO 19115 Topic Category
elevation
Theme
None
Bathymetry/Topography
DEM
Digital Elevation Model
elevation
flooding
inundation
lidar
sea level rise
topography
Theme
ISO 19115 Topic Category
elevation
Theme
Global Change Master Directory (GCMD) Science Keywords
elevation
Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Earth Science > Land Surface > Topography > Terrain Elevation
Earth Science > Oceans > Coastal Processes > Coastal Elevation
Spatial
None
Commonwealth of Mariana Islands
Saipan
US
Spatial
U.S. Coastline
Spatial
Global Change Master Directory (GCMD) Location Keywords
Vertical Location > Land Surface
Instrument
Global Change Master Directory (GCMD) Instrument Keywords
Earth Remote Sensing Instruments > Active Remote Sensing > Profilers/Sounders > Lidar/Laser Sounders > LIDAR > Light Detection and Ranging
Platform
Global Change Master Directory (GCMD) Platform Keywords
Aircraft > Aircraft
OCM
Charleston
SC
Data Set
Elevation
None planned
Raster
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
Distributor
2020
coastal.info@noaa.gov
Organization
NOAA Office for Coastal Management
NOAA/OCM
2234 South Hobson Avenue
Charleston
SC
29405-2413
https://www.coast.noaa.gov/
Data Steward
2020
coastal.info@noaa.gov
Organization
NOAA Office for Coastal Management
NOAA/OCM
2234 South Hobson Avenue
Charleston
SC
29405-2413
https://www.coast.noaa.gov/
Metadata Contact
2020
coastal.info@noaa.gov
Organization
NOAA Office for Coastal Management
NOAA/OCM
2234 South Hobson Avenue
Charleston
SC
29405-2413
https://www.coast.noaa.gov/
Point of Contact
2020
coastal.info@noaa.gov
Organization
NOAA Office for Coastal Management
NOAA/OCM
2234 South Hobson Avenue
Charleston
SC
29405-2413
https://www.coast.noaa.gov/
Ground Condition
Range
20070506
20070509
145.687121
145.832956
15.292437
15.089288
6325
Unclassified
Data is available online for bulk or custom downloads
None
Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations.
20200325
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9065
2020
Organization
NOAA Office for Coastal Management
Customized Download
Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base.
Zip
Zip
20200325
https://coast.noaa.gov/htdata/raster2/elevation/SLR_viewer_DEM_CNMI_9065
2020
Organization
NOAA Office for Coastal Management
Bulk Download
Bulk download of data files in the original coordinate system.
https://coast.noaa.gov/
NOAA's Office for Coastal Management (OCM) website
Online Resource
HTML
Information on the NOAA Office for Coastal Management (OCM)
https://coast.noaa.gov/dataviewer/
NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
Online Resource
HTML
The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer.
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. The vertical accuracy of the source lidar for this DEM, 2007 USACE Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) Topobathy Lidar: Saipan, CNMI, is 20 cm RMSE.
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.
Data covers the tile scheme provided for the project area. Elevation data checked for anomalous elevation values outside expected range.
10
The following datasets were used to develop the DEM:
1. 2007 USACE JALBTCX Topobathy Lidar: Saipan, CNMI
2. Hydrographic breaklines delineated from lidar intensity imagery generated from the LiDAR dataset.
2012
Non-InPort Person/Organization
1
GeoCue software was used to develop lidar intensity imagery from the lidar. The raster resolution was 1 ft or 0.3 m.
2012
Non-InPort Person/Organization
2
Lidar intensity images were viewed in 2-D in ArcMap. Hydrographic features were collected as 2D breaklines.
2012
Non-InPort Person/Organization
3
Class 2, ground lidar points are exported from the LAS files into an Arc Geodatabase (GDB) in multipoint format. Hydro breaklines are assigned an elevation of -0.5 meters and loaded into an Arc GDB. An ESRI Terrain is generated from these inputs.
2012
Non-InPort Person/Organization
4
The ESRI Terrain is converted to a DEM in Erdas image file format with a cell size of 3 meters. The DEM is reviewed in Global Mapper for incorrect elevations and artifacts that are introduced from source inputs or during the raster creation process. Corrections are applied to the DEMs and reprocessed for review.
2012
Non-InPort Person/Organization
5
All DEMs are loaded into Global Mapper for the last review. During this last review, an analyst checks to ensure full, complete coverage, no issues along DEM boundaries, DEMs seamlessly edge-match, and that there are no remaining processing artifacts in the dataset. Once approved, DEMs are re-projected to the NAD83 geographic coordinate system.
2012
Non-InPort Person/Organization