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Topographic Data Development (Lidar acquisition and processing) for Camp Shelby, MS
Topographic Data Development (Lidar acquisition and processing) for Camp Shelby, MS
FGDC, ESRI Metadata
Description Spatial Data Quality Data Source Data Distribution Metadata
+ Resource Description
Citation
Information used to reference the data.
Title: Topographic Data Development (Lidar acquisition and processing) for Camp Shelby, MS
Originators: EarthData International, Inc.
Publication date: 20070127
Data type: map
Description
A characterization of the data, including its intended use and limitations.
Abstract:
This metadata record describes the acquisition and
processing of bare earth lidar data, raw point cloud lidar
data, lidar intensity data, and floodmap breaklines
consisting of a total of 280 sheets for Camp Shelby, MS.
The post-spacing for this project is 3-meter.  This project
was broken into 3 parts, Acquisition, Part A Processing,
and Part B Processing.  Acquisition was tasked by
Mississippi Geographic Information, LLC (MGI); Work
Order No. ED-5. Part A Processing was tasked by MGI;
Work Order No. ED-7.  Part B Processing was tasked by
MGI; Work Order No. ED-8.  EarthData International, Inc.
(EarthData) is a member of MGI and was authorized to
undertake this project in accordance with the terms and
conditions of the Professional Services Agreement
between MGI and the Mississippi Department of
Environmental Quality (MDEQ), dated February 17, 2004,
and in accordance with MGI Task Order No. 18a.
This project is being delivered to the City of Hattiesburg,
Camp Shelby, USGS, and MDEQ.
Products developed for the City of Hattiesburg (City of
1. Final lidar data georeferenced to MS State Plane East
Zone, NAD83, NAVD88, US Survey foot
2. Bare earth lidar data in ASCII format and LAS format
3. Raw point cloud lidar data in LAS format
4. Lidar intensity data in TIF format
5. Digital flight line index in ESRI-compatible format
6. Survey control report
7. Lidar processing report
Products developed for Camp Shelby (Part A) include the
1. Final lidar data georeferenced to UTM Zone 16 North,
NAD83, NAVD88, meters
2. Bare earth lidar data in ASCII format and LAS format
3. Raw point cloud lidar data in LAS format
4. Lidar intensity data in TIF format
5. Digital flight line index in ESRI-compatible format
6. Survey control report
7. Lidar processing report
Products developed for USGS (Part A and Part B) include
1. Final lidar data georeferenced to MS State Plane East
Zone, NAD83, NAVD88, US Survey foot
2. Bare earth lidar data in ASCII format and LAS format
3. Raw point cloud lidar data in LAS format
4. Lidar intensity data in TIF format
5. Digital flight line index in ESRI-compatible format
6. Survey control report
7. Lidar processing report
Products developed for MDEQ (Part A and Part B) include
1. Final lidar data georeferenced to MS State Plane East
Zone, NAD83, NAVD88, US Survey foot
2. Bare earth lidar data in ASCII format and LAS format
3. Raw point cloud lidar data in LAS format
4. Lidar intensity data in TIF format
5. Floodmap breaklines in ESRI shapefile format
6. Digital flight line index in ESRI-compatible format
7. Survey control report
8. Lidar processing report
Purpose:
The acquisition, processing, and delivery of bare earth
lidar data, raw point cloud lidar data, lidar intensity data,
and floodmap breaklines covering Camp Shelby, MS was
a coordinated effort between EarthData and MGI to
support Mississippi Digital Earth Model (MDEM) and
FEMA flood mapping requirements. Floodmap breaklines
are intended to support DFIRM modeling and update
only, and will be delivered to MDEQ for use on the DFIRM
program.
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: EarthData International, Inc.
Person: Angela Worley
Position: Project Manager
Phone: 301-948-8550 x222
Fax: 301-963-2064
Email: aworley@earthdata.com
Hours of service: Monday through Friday, 8:30am to 5:00pm
Address type: mailing and physical address
Address:
7320 Executive Way
City: Frederick
State or Province: MD
Postal code: 21704
Country: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
Data type: map
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Beginning date: 20060326
Ending date: 20060327
Currentness reference:
Publication Date
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: Unknown
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: lidar, DEM, Topographic, bare earth, intensity image, LAS, ASCII, raw point cloud, floodmap breaklines
Keyword thesaurus: EDI Thesaurus
Place:
Keywords: EarthData, Camp Shelby, Mississippi, USA
Keyword thesaurus: Geographic Names Information System
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None
Use constraints:
None
+ Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Coordinate System Details
Grid coordinate system
Grid coordinate system name: Universal Transverse Mercator
Universal Transverse Mercator:
UTM zone number: 16
Transverse Mercator:
Scale factor at central meridian: 0.999600
Longitude of central meridian: -087.000000
Latitude of projection origin: +00.000000
False easting: 500000.0
False northing: 0.00000
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 3
Ordinate resolution: 3
Planar distance units: Meters
Geodetic model
Horizontal datum name: North American Datum of 1983
Ellipsoid name: Geodetic Reference System 80
Semi-major axis: 6378137.000000
Denominator of flattening ratio: 298.257222
Vertical Coordinate System
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude datum name: North American Vertical Datum of 1988
Altitude resolution: .65
Altitude distance units: Feet
Altitude encoding method: Implicit coordinate
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Unprojected coordinates (geographic)
Boundary Coordinate
West -89.4335226 (longitude)
East -88.730680 (longitude)
North 31.430612 (latitude)
South 30.841160 (latitude)
+ Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
Compliance with the accuracy standard was ensured by
the placement of GPS ground control after the acquisition
1. The ground control and airborne GPS data stream were
validated through a fully analytical boresight adjustment.
2. The digital terrain model (DTM) data were checked
against the project control.
3. Lidar elevation data was validated through an
inspection of edge matching  and visual inspection for
quality (artifact removal).
Completeness report:
1. EarthData's proprietary software, Checkedb, for
verification against ground survey points.
2. Terrascan, for verification of automated and manual
editing and final QC of products.
Cloud cover: 0
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
Airborne lidar data was acquired at an altitude of 8,000 ft
(2,438 m) above mean terrain with a swath width of
5,823.57 ft (1,775.03 m), which yields an average post
spacing of lidar points of no greater than 9.84 ft (3 m). The
project was designed to achieve a vertical accuracy of
the lidar points at 7.28 in (18.5 cm) root mean square error
(RMSE).
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
The lidar data fully comply with FEMA guidance as
published in Appendix A, April, 2003.
Vertical accuracy report:
The lidar data fully comply with FEMA guidance as
published in Appendix A, April 2003.  When compared
to GPS survey grade points in generally flat
non-vegetated areas, at least 95% of the positions have
an error less than or equal to 37 cm (equivalent to root
mean square error of 18.5 cm if errors were normally
distributed).
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
Aerial Lidar Acquisition
Title: Aerial Acquisition of Lidar Data for Camp Shelby, MS
Originators: EarthData International, Inc. (Aviation Division)
Publication date: 20060412 Publication time: Unknown
Edition: 1
Data type: model
Media: DVD
Source contribution:
MGI requested the collection of lidar data over Camp
Shelby, MS. In response EarthData acquired the data
from March 21 to April 12, 2006 using its aircraft with tail
number N62912.  Lidar data was captured using an ALS50
lidar system, including an inertial measuring unit (IMU) and
a dual frequency GPS receiver.  An additional GPS
receiver was in constant operation over a National
Geodetic Survey published point by EarthData at
Hattiesburg- Bobby L. Chain Municipal Airport which was
later tied into a local network by Waggoner Engineering,
Inc.  During the data acquisition, the receivers collected
phase data at an epoch rate of 1 Hz.  The solution from
Camp Shelby, MS was found to be of high integrity and
met the accuracy requirements for the project. These
accuracy checks also verified that the data meets the
guidelines outlined in FEMA's Guidelines and
Specifications for Flood Hazard Mapping Partners and
Appendix A, section 8, Airborne Light Detection and
Ranging (LIDAR) Surveys.
Airspeed - 130 knots
Laser Pulse Rate - 38,000 kHz
Field of View - 40 degrees
Scan Rate - 20 Hz
Date: 20070215
Currentness reference:
Ground Condition
Ground Control
Title: Camp Shelby, Mississippi - Lidar Control
Originators: Waggoner Engineering, Inc.
Publication date: 20060926
Edition: 1
Data type: diagram
Media: electronic mail system
Source contribution:
Waggoner Engineering, Inc., under contract to EarthData
successfully established ground control for Camp Shelby,
MS.  A total of 36 ground control points in Camp Shelby,
MS were acquired.  GPS was used to establish the control
network.  The horizontal datum was the North American
Datum of 1983 (NAD83).  The vertical datum was the North
American Vertical Datum of 1988 (NAVD88).
Date: 20060926
Currentness reference:
Ground Condition
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
EarthData has developed a unique method for
processing lidar data to identify and remove elevation
points falling on vegetation, buildings, and other
aboveground structures.  The algorithms for filtering data
were utilized within EarthData's proprietary software and
commercial software written by TerraSolid.  This software
suite of tools provides efficient processing for small to
large-scale, projects and has been incorporated into ISO
9001 compliant production work flows. The following is a
1. The technician performs calibrations on the data set.
2. The technician performed a visual inspection of the
data to verify that the flight lines overlap correctly. The
technician also verified that there were no voids, and that
the data covered the project limits. The technician then
selected a series of areas from the data set and
inspected them where adjacent flight lines overlapped.
These overlapping areas were merged and a process
which utilizes 3-D Analyst and EarthData's proprietary
software was run to detect and color code the differences
in elevation values and profiles. The technician reviewed
these plots and located the areas that contained
systematic errors or distortions that were introduced by the
lidar sensor.
3. Systematic distortions highlighted in step 2 were
removed and the data was re-inspected.  Corrections and
adjustments can involve the application of angular
deflection or compensation for curvature of the ground
surface that can be introduced by crossing from one type
of land cover to another.
4. The lidar data for each flight line was trimmed in batch
for the removal of the overlap areas between flight lines.
The data was checked against a control network to
ensure that vertical requirements were maintained.
Conversion to the client-specified datum and projections
were then completed. The lidar flight line data sets were
then segmented into adjoining tiles for batch processing
and data management.
5. The initial batch-processing run removed 95% of points
falling on vegetation.  The algorithm also removed the
points that fell on the edge of hard features such as
structures, elevated roadways and bridges.
6. The operator interactively processed the data using
lidar editing tools.  During this final phase the operator
generated a TIN based on a desired thematic layers to
evaluate the automated classification performed in step 5.
This allowed the operator to quickly re-classify points from
one layer to another and recreate the TIN surface to see
the effects of edits.  Geo-referenced images were toggled
on or off to aid the operator in identifying problem areas.
The data was also examined with an automated profiling
tool to aid the operator in the reclassification.
7. The final bare earth was written to an LAS 1.0 format and
also converted to ASCII.
8. The point cloud data were delivered in LAS 1.0 format.
Organization: EarthData International, Inc.
Person: Angela Worley
Position: Project Manager
Phone: 301-948-8550 x222
Fax: 301-963-2064
Email: aworley@earthdata.com
Hours of service: Monday through Friday, 8:30am to 5:00pm
Address type: mailing and physical address
Address:
7320 Executive Way
City: Frederick
State or Province: MD
Postal code: 21704
Country: USA
Process date: 20070215
Data Source used
Lidar
Data Source produced
Lidar
Process Step 2
Process description:
EarthData utilizes a combination of proprietary and COTS
processes to generate intensity images from the lidar
data. Intensity images are generated from the full points
cloud (minus noise points) and the pixel width is typically
matched to the post spacing of the lidar data to achieve
the best resolution. The following steps are used to
1. Lidar point cloud is tiled to the deliverable tile layout.
2. All noise points, spikes, and wells are deleted out of the
tiles.
3. An EarthData proprietary piece of software, EEBN2TIF
is then used to process out the intensity values of the lidar.
At this point, the pixel size is selected based on best fit or
to match the client specification if noted in the SOW.
4. The software then generates TIF and TFW files for each
tile.
5. ArcView is used to review and QC the tiles before
delivery.
6. The lidar intensity data were delivered in TIF format.
Organization: EarthData International, Inc.
Person: Angela Worley
Position: Project Manager
Phone: 301-948-8550 x222
Fax: 301-963-2064
Email: aworley@earthdata.com
Hours of service: Monday through Friday, 8:30am to 5:00pm
Address type: mailing and physical address
Address:
7320 Executive Way
City: Frederick
State or Province: MD
Postal code: 21704
Country: USA
Process date: 20070215
Data Source used
Intensity
Data Source produced
Lidar Intensity Values
Process Step 3
Process description:
Dataset copied.
Data Source used
P:\2006\J06-0033_CampShelby_Lidar\metadata\CampShelbyMS_CampShelbyDel\MetadataCampShelbyMSa
+ Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Distribution liability:
None
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: Mississippi Geographic Information, LLC
Person: Bill McDonald
Position: Project Manager
Phone: 601-355-9526
Fax: 601-352-3945
Email: Bill.McDonald@waggonereng.com
Address type: mailing and physical address
Address:
143-A LeFleurs Square
City: Jackson
State or Province: MS
Postal code: 39211
Country: USA
+ Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20070215
Last metadata review date: 20070215
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: EarthData International, Inc.
Person: Angela Worley
Position: Project Manager
Phone: 301-948-8550 x222
Fax: 301-963-2064
Email: aworley@earthdata.com
Hours of service: Monday through Friday, 8:30am to 5:00pm
Address type: mailing and physical address
Address:
7320 Executive Way
City: Frederick
State or Province: MD
Postal code: 21704
Country: USA
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.3
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.