Manitowoc Co. QL2 LiDAR (2015-16) - DEM

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
Originator: Ayres Associates
Publication_Date: 20170712
Title: Manitowoc Co. QL2 LiDAR (2015-16) - DEM
Publication_Information:
Publication_Place: Charleston, SC
Publisher: NOAA's Ocean Service (NOS), Office for Coastal Management (OCM)
Online_Linkage: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6343
Online_Linkage:
https://coast.noaa.gov/htdata/raster2/elevation/WI_3DEP_Manitowoc_2015_6343
Online_Linkage: https://coast.noaa.gov/dataviewer
Online_Linkage: https://coast.noaa.gov
Description:
Abstract:
The Manitowoc County lidar project area covers approximately 602 square miles plus a 100 meter buffer around the county boundary. The lidar data was acquired at a nominal point spacing (NPS) of 0.7 meters and a single swath nominal point density (NPD) of 2.0. Project specifications are based on Manitowoc County requirements and on the U.S. Geological Survey National Geospatial Program LiDAR Base Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83(2011) / WISCRS Manitowoc (ftUS) (EPSG code: 7614), and vertical datum of NAVD88 - Geoid12A (Feet). LiDAR data was acquired using the Orion Optech H300 sensor from November 2, 2015 to November 10, 2015 in five total lifts. Acquisition occurred after leaves had fallen from deciduous trees, before snow was on the ground, and with rivers at or below normal levels.
The data was converted to vertical meters for ingest into the Digital Coast Data Access Viewer.
Purpose:
This data, along with its derivatives, is the result of a countywide elevation mapping with cooperative partnerships from Manitowoc County, Wisconsin DOA, and the USGS 3DEP program. This data was produced from lidar data collected in November 2015, which was processed and delivered in 2016.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20151102
Ending_Date: 20151110
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -88.047445
East_Bounding_Coordinate: -87.505089
North_Bounding_Coordinate: 44.329611
South_Bounding_Coordinate: 43.889563
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: elevation
Theme_Keyword: Lidar
Theme_Keyword: Hydrology
Theme_Keyword: DEM
Theme_Keyword: GRID
Theme_Keyword: surface model
Theme_Keyword: surface data
Theme_Keyword: terrain data
Theme_Keyword: bare earth
Theme_Keyword: raster digital data
Theme_Keyword: 2 foot pixel
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Wisconsin
Place_Keyword: Manitowoc County
Access_Constraints: No restrictions apply to these data.
Use_Constraints:
None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Manitowoc County
Contact_Person: Cathy DeLain
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: Mailing and Physical
Address: 1024 South 9th Street
City: Manitowoc
State_or_Province: WI
Postal_Code: 54220
Country: U.S.A.
Contact_Voice_Telephone: 920-683-2781
Contact_Electronic_Mail_Address: cathydelain@co.manitowoc.wi.us
Browse_Graphic:
Browse_Graphic_File_Name:
https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6339/supplemental/2016_Manitowoc_area.kmz
Browse_Graphic_File_Description: A polygon footprint of this data set.
Browse_Graphic_File_Type: kmz
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.
Logical_Consistency_Report:
Spatial consistency of coverage of the Manitowoc Co. QL2 LiDAR (2015-16) project area was maintained throughout the dataset.
Completeness_Report:
Spatial consistency of coverage of the Manitowoc Co. QL2 LiDAR (2015-16) project area was maintained throughout the dataset.
Positional_Accuracy:
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The project specifications require the vertical accuracy of the LiDAR data to be calculated and reported according to Non-vegetated Vertical Accuracy (NVA) and Vegetated Vertical Accuracy (VVA) classifications.
The required NVA for this project is 19.6 cm (0.643 survey feet) calculated at the 95 percent confidence level (AccuracyZ). The 95 percent confidence level statistic is derived according to National Standards for Spatial Data Accuracy (NSSDA) methodologies using RMSEz * 1.9600. This requirement is for the vertical accuracy testing of the raw swath lidar data and the derived digital elevation model (DEM). The AccuracyZ statistic is assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. The minimum required number of NVA checkpoints for this project area is 45. The required VVA for this project is 29.4 cm (0.965 survey feet) calculated at the 95th percentile derived according to ASPRS Guidelines, Vertical Accuracy Reporting for Lidar Data, i.e., based on the 95th percentile error in all vegetated land cover classes combined. This requirement is for the vertical accuracy testing of the derived digital elevation model (DEM). The minimum required number of VVA checkpoints for this project area is 35.
The NVA (bare earth and urban area land cover classes) and VVA (tall weeds, forested, and swamp land cover classes) checkpoints were distributed throughout the project area and were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the hydro flattened raster DEM were measured for the x,y location of each check point. Elevations interpolated from the hydro flattened raster DEM surface were then compared to the elevation values of the surveyed control points.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 0.092
Vertical_Positional_Accuracy_Explanation:
Tested 0.092 meters (0.302 survey feet) NVA at the 95 percent confidence level. The NVA of the DEM was calculated using 45 independent checkpoints located in the Bare Earth and Urban land cover categories.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 0.092
Vertical_Positional_Accuracy_Explanation:
Tested 0.092 meters (0.303 survey feet) NVA at the 95 percent confidence level. The NVA of the raw swath was calculated using 45 independent checkpoints located in the Bare Earth and Urban land cover categories.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: 0.153
Vertical_Positional_Accuracy_Explanation:
Tested 0.153 meters (0.501 survey feet) VVA against the DEM at the 95th percentile. The VVA of the DEM was calculated using 35 independent checkpoints located in the tall weed, forested, and swamp land cover categories. The 95th percentile is determined by taking the absolute value of each elevation comparison between the VVA checkpoints and hydro flattened DEM, sorting the elevation values from lowest to highest, and discarding the highest 5% of the sorted elevation values. The next highest remaining value is the resultant 95th percentile value.
Lineage:
Process_Step:
Process_Description:
LiDAR processing utilizes several software packages, including GeoCue and the TerraSolid suite of processing components. The GeoCue software is a database management system for housing the LiDAR dataset (usually multiple gigabytes in size). GeoCue incorporates a thorough checklist of processing steps and quality assurance/quality control (QA/QC) procedures that assist in the LiDAR workflow. The TerraSolid software suite is used to automate the initial classification of the LiDAR point cloud based on a set of predetermined parameters. Lidar technicians refer to ground cover research (natural and cultural features) within the project area and determine algorithms most suitable for the initial automated LiDAR classification. (Some algorithms/filters recognize the ground in forests well, while others have greater capability in urban areas). During this process each point is given an initial classification (e.g., as ground, vegetation, or noise) based on the point's coordinates and the relation to its neighbors. Classifications to be assigned include all those outlined by ASPRS standards. The initial classifications produce a coarse and inexact dataset, but offer an adequate starting point for the subsequent manual classification procedure. During this step, "overlap" points are automatically classified (those originating from neighboring flightlines) using information gathered from the ABGPS and IMU data. Any duplicate points existing from adjacent flightlines are removed during this process. Hydrographic breaklines are collected using LiDARgrammetry to ensure hydro flattened water surfaces. This process involves manipulating the LiDAR data's intensity information to create a metrically sound stereo environment. From this generated "imagery", breaklines are photogrammetrically compiled. Breakline polygons are created to represent open water bodies. The LiDAR points that fall within these areas are classified as "water." All hydrographic breaklines include a 3.125 foot buffer, with the Class 2 (bare earth) points being re-classified as Class 10 (ignored ground). TerraSolid is further used for the subsequent manual classification of the LiDAR points allowing technicians to view the point cloud in a number of ways to ensure accuracy and consistency of points and uniformity of point coverage. The TIN was processed to create a GRID or digital elevation model (DEM) with 2 foot pixels.
Process_Date: Unknown
Process_Step:
Process_Description:
The NOAA Office for Coastal Management received the data from the Wisconsin Department of Natural Resources in img format. The vertical coordinates were converted from feet to meters using gdal_translate.
Process_Date: 20170705
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Office for Coastal Management
Contact_Address:
Address_Type: mailing and physical
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD83(2011) / WISCRS Manitowoc (ftUS) (EPSG code: 7614)
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 1.0000233704
Longitude_of_Central_Meridian: -87.55
Latitude_of_Projection_Origin: 43.2666666666667
False_Easting: 262000.006
False_Northing: 0.004
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 2
Ordinate_Resolution: 2
Planar_Distance_Units: foot_us
Geodetic_Model:
Horizontal_Datum_Name: NAD_1983(2011)
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.01
Altitude_Distance_Units: meter
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Office for Coastal Management
Contact_Address:
Address_Type: mailing and physical
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Any conclusions drawn from the analysis of this information are not the responsibility of Ayers Associates, the U.S. Geological Survey, the NOAA Office for Coastal Management or its partners.
Custom_Order_Process:
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer
Metadata_Reference_Information:
Metadata_Date: 20170706
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Office for Coastal Management
Contact_Address:
Address_Type: mailing and physical
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.32 on Thu Jul 6 15:01:56 2017