Dataset Identification:
- Collect and deliver high-density elevation point data derived from multiple-return light detection and ranging (LiDAR) measurements for use in supporting topographic analysis, including applications such as flood plain mapping. The Nominal Point Spacing Value for the final lidar is 3.2 ft (~1 m). Deliver LiDAR Bare Earth and Contour lines within the areas designated in areas of Clay, Itawamba, Monroe, and Lowndes Counties to aid in visual interpretation of Flood Basin elevations and for addition to the MDEM elevation dataset. Comply with mapping guidelines and specifications as stated in the FEMA Procedure Memorandum No. 61
- Title 2011 MDEQ Tennessee-Tombigbee Waterway Lidar Survey
- publication Date 2013-09-16
- organisation Name NOAA's Ocean Service, Office for Coastal Management (OCM)
- Contact information
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- Address
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- , Charleston, SC
- organisation Name Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
- organisation Name Mississippi Department of Environmental Quality (MDEQ)
- organisation Name
- Contact information
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- Linkage for online resource
- organisation Name
- Contact information
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- Linkage for online resource
- organisation Name
- Contact information
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- Linkage for online resource
- organisation Name
- Contact information
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- Linkage for online resource
Theme keywords (theme):
Bathymetry/Topography
Land Surface
Topography
Digital Terrain Model
Elevation Data
LIDAR
Ground Control
Point Cloud
LAS Point Files
Bare Earth
Point Cloud
LAS
Elevation
Light Detection and Ranging
Digital Elevation
Remote Sensing
- Title None
Location keywords:
Mississippi
Itawamba
Monroe
Lowndes
Tennessee
Tombigbee
- Title None
Temporal keywords:
lead off
Fall
Winter
- Title none
Theme keywords (theme):
- Title Activity > Observation
- publication Date 2016-11-14
Theme keywords (theme):
- Title Resource Type > Document
- publication Date 2016-11-14
Theme keywords (theme):
- Title Material > Chemical
- publication Date 2016-11-14
Theme keywords (theme):
- Title Method > Information Processing
- publication Date 2016-11-14
Theme keywords (theme):
- Title Realm > Earth Surface
- publication Date 2016-11-14
Theme keywords (theme):
- Title Property > Measure
- publication Date 2016-11-14
Theme keywords (theme):
- Title Material > Environmental Material
- publication Date 2016-11-14
Theme keywords (theme):
- Title Feature > Physiographic Feature
- publication Date 2016-11-14
Theme keywords (theme):
- Title Equipment > Instrument
- publication Date 2016-11-14
Theme keywords (theme):
- Title Resource Type > Specification
- publication Date 2016-11-14
purpose:
Browse image (thumbnail):
- maintenance or update frequency: asNeeded
- Constraints
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- Use limitation statement:
- Any conclusions drawn from the analysis of this information are not the responsibility of the following: MDEQ, The Atlantic Group, NOAA, the Office for Coastal Management, or its partners.
- Legal Constraints
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- use constraint: otherRestrictions
- Other constraints
- Use Constraints: 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. These data depict the heights at the time of the survey and are only accurate for that time.
- Legal Constraints
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- Access Constraints otherRestrictions
- Other constraints
- Access Constraints: None
Resource extent
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- westBoundLongitude -89.639595
- eastBoundLongitude -87.274625
- northBoundLatitude 34.514993
- southBoundLatitude 33.372751
Geographic Bounding Box - Temporal Extent
Geographic Extent
- Reflective surface data represents the DEM created by laser energy reflected from the first surface encountered by the laser pulse. Some energy may continue beyond this initial surface to be reflected by a subsequent surface as represented by the last return data. Intensity information is captured from the reflective surface pulse and indicates the relative energy returned to the sensor as compared to the energy transmitted. The intensity image is not calibrated or normalized but indicates differences in energy absorption due to the interaction of the surface materials with laser energy at the wavelength transmitted by the sensor. Points are classified as water, bare ground or not bare ground to support creation of a bare earth model from the data. A footprint of this data set may be viewed in Google Earth at: ftp://coast.noaa.gov/pub/DigitalCoast/lidar1_z/geoid12a/data/2560/supplemental/ms2011_mdeq_tenn_tombigbee.KMZ The MDEQ Tennessee-Tombigbee report may be accessed at: ftp://coast.noaa.gov/pub/DigitalCoast/lidar1_z/geoid12a/data/2560/supplemental/ms2011_mdeq_tenn_tombigbee.pdf
- Bryan Daniel (Atlantic Group), Josh Helton (Atlantic Group), Patrick Robinson (Atlantic Group), Paul Weyant (Atlantic Group), Barbara Yassin (MDEQ)
Grid spatial representation
- number of grid dimensions: 2
- Grid axis property:
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- Grid Dimension
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- Dimension Name: column
- Dimension Size
- Grid Dimension
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- Dimension Name: row
- Dimension Size
- transformation parameter availability: false
Content information, image description
- Type of coverage content
- Cell value attribute description:
- Cloud Cover Percentage 0
Data quality information
Scope of quality information
- source
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- source description Source Contribution: Delivery of LiDAR data, Contours data, Digital Elevation Model (DEM) data, and Breaklines.Source Type digital tape media
- source citation
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- Title Tennessee-Tombigbee Study Basin, Northeastern Mississippi
- publication Date 2012-07-31T1200
- Edition 1
- presentationForm mapDigital
- cited responsible party - originator
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- organisation Name The Atlantic Group
Resource extent
- Temporal Extent
2012-07-31T1200
- name Of Measure Horizontal Positional Accuracy Report
- evaluation Method Description LiDAR data horizontal accuracy is met as contracted. The Nominal Point Spacing Value for the final LiDAR is 3.2 ft (0.97 m).
- name Of Measure Horizontal Positional Accuracy
- measure Description Horizontal point accuracy is a function of angular origination of the pulse; IMU orientation; the scanner encoder and ranging function and will vary depending on the proposed point density selected for the collection. Statistically, the error is roughly 1/3 of the illuminated foot print on the ground and is a function of the beam divergences. This gives a final horizontal accuracy value of 2.13 feet (0.649 m).
- Quantitative Result
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- result value 0.649
- value Units
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- name Of Measure Vertical Positional Accuracy Report
- evaluation Method Description LiDAR vertical data accuracy determination shall employ the National Standard for Spatial Data Accuracy (NSSDA).The Nominal Point Spacing Value for the final LiDAR is 3.2 ft.
- name Of Measure Vertical Positional Accuracy
- measure Description Based on the vertical accuracy testing conducted by The Atlantic Group, LLC using NSSDA methodology, the dataset tested for vertical accuracy at 95% confidence level in open terrain, based on open terrain. This gives a final vertical accuracy value of 0.24 feet (0.07 m).
- Quantitative Result
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- result value 0.07
- value Units
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- evaluation Method Description All data is complete to standards as specified. LIDAR raster data is visually inspected for completeness to ensure that any gaps between flight lines of required collection area. LIDAR is self-illuminating and has minimal cloud penetration capability. Water vapor in steam plumes or particulates in smoke may cause reflection of LIDAR signals and loss of elevation information beneath these plumes. Glass structures and roofs may appear transparent to the LIDAR signal and therefore may not register on the reflective surface.
- evaluation Method Description All data is complete to standards as specified. LIDAR raster data is visually inspected for completeness to ensure that any gaps between flight lines of required collection area. LIDAR is self-illuminating and has minimal cloud penetration capability. Water vapor in steam plumes or particulates in smoke may cause reflection of LIDAR signals and loss of elevation information beneath these plumes. Glass structures and roofs may appear transparent to the LIDAR signal and therefore may not register on the reflective surface.
- measure Description QC/QA process includes review of flight alignments and completeness of supporting data. The MDEQ or its designee may perform additional QC/QA testing. The root mean square error (RMSE) is used to estimate both horizontal and vertical accuracy. RMSE is the square root of the average of the set of squared differences between dataset coordinate values and coordinate values from an independent source. Bare-earth processed data for this acquisition block comply with the following accuracy requirements for Artifact/Feature removal: artifacts - 90%; outliers - 95%; vegetation - 95%; buildings - 98%. All LAS formatted LIDAR data are validated using commercial GIS software to ensure proper formatting and loading before delivery. This validation procedure ensures that data on delivery media is in correct physical format and is readable. Higher accuracy for identical points. If those differences are normally distributed and average zero, 95 percent of any sufficiently large sample should be less than 1.96 times the RMSE. Therefore 9-centimeter RMSE can be referred to as "18-centimeter accuracy at the 95-percent confidence level." Following that convention, the vertical accuracy of any DEM is defined as 1.96 times the RMSE of linearly interpolated elevations in the DEM, as compared with known elevations from high-accuracy test points. DEMs should have a maximum RMSE as specified to meet its required vertical accuracy.
Resource distribution information
Distributor
- organisation Name NOAA Office for Coastal Management
- Contact information
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- Telephone
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- Voice 843-740-1202
- Address
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- 2234 South Hobson Avenue, Charleston, SC, 29405-2413
- electronic Mail Address coastal.info@noaa.gov
- maintenance or update frequency: annually
- notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
- organisation Name NOAA Office for Coastal Management
- Contact information
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- Telephone
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- Voice 843-740-1202
- Address
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- 2234 South Hobson Avenue, Charleston, SC, 29405-2413
- electronic Mail Address coastal.info@noaa.gov