EarthData International, Inc.20070127Topographic Data Development (Lidar acquisition and processing) for Camp Shelby, MSmap\\thor\psc\2006\J06-0033_CampShelby_Lidar\metadata\CampShelbyMS_CampShelbyDel\MetadataCampShelbyMSa
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
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.
2006032620060327Publication DateUnknown-88.7508722417924-88.699711761749231.105282081965831.061250759634410100701026070567830583830EDI ThesauruslidarDEMTopographicbare earthintensity imageLASASCIIraw point cloudfloodmap breaklinesGeographic Names Information SystemEarthDataCamp ShelbyMississippiUSANoneNoneEarthData International, Inc.Angela WorleyProject Managermailing and physical address
7320 Executive Way
FrederickMD21704USA301-948-8550 x222301-963-2064aworley@earthdata.comMonday through Friday, 8:30am to 5:00pm
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).
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).
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.
The lidar data fully comply with FEMA guidance as
published in Appendix A, April, 2003.
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).
EarthData International, Inc. (Aviation Division)20060412UnknownAerial Acquisition of Lidar Data for Camp Shelby, MS1modelDVD20070215Ground ConditionAerial Lidar Acquisition
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
Waggoner Engineering, Inc.20060926Camp Shelby, Mississippi - Lidar Control1diagramelectronic mail system20060926Ground ConditionGround Control
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).
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.
Lidar20070215LidarEarthData International, Inc.Angela WorleyProject Managermailing and physical address
7320 Executive Way
FrederickMD21704USA301-948-8550 x222301-963-2064aworley@earthdata.comMonday through Friday, 8:30am to 5:00pm
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.
Intensity20070215Lidar Intensity ValuesEarthData International, Inc.Angela WorleyProject Managermailing and physical address
7320 Executive Way
FrederickMD21704USA301-948-8550 x222301-963-2064aworley@earthdata.comMonday through Friday, 8:30am to 5:00pmDataset copied.P:\2006\J06-0033_CampShelby_Lidar\metadata\CampShelbyMS_CampShelbyDel\MetadataCampShelbyMSa200702150GCS_North_American_1983NAD_1983_StatePlane_Mississippi_East_FIPS_2301_Feetcoordinate pairsurvey feet0.0000000.000000Transverse Mercator0.999950-88.83333329.500000984250.0000000.000000North American Datum of 1983Geodetic Reference System 806378137.000000298.257222North American Vertical Datum of 1988.65FeetImplicit coordinateMississippi Geographic Information, LLCBill McDonaldProject Managermailing and physical address
143-A LeFleurs Square
JacksonMS39211USA601-355-9526601-352-3945Bill.McDonald@waggonereng.comNone2007021520070215EarthData International, Inc.Angela WorleyProject Managermailing and physical address
7320 Executive Way
FrederickMD21704USA301-948-8550 x222301-963-2064aworley@earthdata.comMonday through Friday, 8:30am to 5:00pmFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998{5590EE4D-48D8-4DD7-B00F-829E433741F8}2007021514295800TRUEfile://\\thor\psc\2006\J06-0033_CampShelby_Lidar\metadata\CampShelbyMS_CampShelbyDel\MetadataCampShelbyMSaLocal Area Network