Lake Winnipeg Shoreline LiDAR

Data format: Raster Dataset

File or table name: e054_lw

Coordinate system: Universal Transverse Mercator

Theme keywords: topography, LiDAR, bare-earth, high-resolution, LAS, DEM, light detection and ranging, digital terrain model, digital elevation model

Abstract: The Lake Winnipeg Shoreline LiDAR data is a raster layer in TIFF format. The raster is a 1m grid representing elevation along the shoreline from Riverton on the west side of the lake to Travers Bay on the east.

FGDC and ESRI Metadata:

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:


Citation:
Citation information:
Originators: Terrapoint Canada Inc, Manitoba Water Stewardship


Title:
Lake Winnipeg Shoreline LiDAR
*File or table name: e054_lw


Publication date: July 2, 2007
*Geospatial data presentation form: raster digital data


Online linkage: https://web2.gov.mb.ca/mli


Description:
Abstract:
The Lake Winnipeg Shoreline LiDAR data is a raster layer in TIFF format. The raster is a 1m grid representing elevation along the shoreline from Riverton on the west side of the lake to Travers Bay on the east.

Purpose:
Data acquired for a high quality DEM of the Lake Winnipeg shoreline.

*Language of dataset: en


Time period of content:
Time period information:
Range of dates/times:
Beginning date: 2007-04-25
Ending date: 2007-04-26

Currentness reference:
ground condition

Status:
Progress: Complete
Maintenance and update frequency: None planned

Spatial domain:
Bounding coordinates:
*West bounding coordinate: -97.044457
*East bounding coordinate: -96.295131
*North bounding coordinate: 51.056499
*South bounding coordinate: 50.256233

Local bounding coordinates:
*Left bounding coordinate: 639356.000000
*Right bounding coordinate: 689613.000000
*Top bounding coordinate: 5657989.000000
*Bottom bounding coordinate: 5570506.000000

Keywords:
Theme:
Theme keywords: topography, LiDAR, bare-earth, high-resolution, LAS, DEM, light detection and ranging, digital terrain model, digital elevation model
Theme keyword thesaurus: none

Place:
Place keywords: Manitoba, Lake Winnipeg, Gimli, Riverton, Victoria Beach, Grand Beach, Petersfield, Dunnotar, Winnipeg Beach
Place keyword thesaurus: Manitoba Toponymic Database

Access constraints: None
Use constraints:
None

Point of contact:
Contact information:
Contact person primary:
Contact person: Lindsay Donnelly
Contact organization: Manitoba Conservation
Contact position: GIS Specialist


Contact address:
Address type: mailing and physical address
Address:
200 Saulteaux Crescent
City: Winnipeg
State or province: Manitoba
Postal code: R3J 3W3
Country: Canada

Contact voice telephone: 204-945-5526
Contact facsimile telephone: 204-945-2385


Contact electronic mail address: lindsay.donnelly@gov.mb.ca


*Native dataset format: Raster Dataset
*Native data set environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.4.1420


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Data Quality Information:


Attribute accuracy:
Attribute accuracy report:
Not applicable

Positional accuracy:
Horizontal positional accuracy:
Horizontal positional accuracy report:
+/- 40 to 60 centimeters on all but extremely hilly terrain.

Vertical positional accuracy:
Vertical positional accuracy report:
1,461 Kinematic check points along multiple roadways within the project site were compared with the LIDAR bald earth surface. A comparison of LIDAR data with the kinematic checkpoints yielded the results given in Table 1. Table 1: Kinematic Comparison (meters) Average dz +0.000 Minimum dz -0.132 Maximum dz +0.122 Average magnitude 0.040 Root mean square 0.048 Std deviation 0.048 
Terrapoint also utilizes a proprietary software package that performs a fully automated analysis of the quality of the lidar data using overlapping flight lines. Our flight lines overlap 30 to 50% on either side and thus 60 to 100% of points can be checked for overlap consistency. The overlap analysis attempts to minimize the differences in overlap areas by fine-tuning the calibration parameters of the LIDAR system.

Lineage:
Process step:
Process description:
Acquisition:
Acquision Equipment: 
LIDAR Sensor: Optech ALTM 3100EA #5142, 100 kHZ System IMU: Applanix (Litton LN200) Onboard GPS: Applanix (Trimble), Ground Reference Stations: Sokkia GSR2600 (3)
Aircraft: Aircraft Base: Gimli Airport & Winnipeg St. Andrews Airport

Primary GPS Control:

All LIDAR Data was referenced to Natural Resources Canada Monuments 82R311 and 75RA42. In addition, all groundtruthing activities were tied to these same monuments. Datasheets for these points are given below:

SITE IDENTIFICATION

Unique Number : 75RA42
Name : 75RA42
Established By : Man. Dept. Of Natural Resources (Surveys And Mapping Branch)
Province : MB
Prov. Identifier : None
NTS Map No : 062I09

STATION COORDINATES

Horizontal Datum : NAD83CSRS
Method : Global Positioning System
Latitude : N50° 44' 50.7995" +/- 0.004 m Std Dev. (68% confidence level)
Longitude : W96° 08' 57.3669" +/- 0.003 m Std Dev. (68% confidence level)
Ellipsoidal Height : 218.64 m +/- 0.022 m Std Dev. (68% confidence level)
Geoid Separation (HTv2.0) : -30.038 m
Agency : Geodetic Survey Division
Adjustment Net : M04711
Epoch : 1997
UTM : Zone = 14 N = 5625615.85 m E = 701102.19 m
XYZ Coords.: = X = -433185.68 m Y = -4020696.32 m Z = 4915984.62 m

VERTICAL DATA

Vertical Datum : CGVD28
Elevation : 248.681 m
Order : First Order
Method : Differential
Adjustment Line : VA2M77
Published Year : 1977

STATION MARKER INFORMATION AND LOCATION

Marker Type : Permanent Agency Marker
Inspected in : 1992
Status: Good Inspection Comments : No inspection text on file
Accessible by passenger car or light truck and a walk of 50 to 500 m

PINE_FALLS

ROCK OUTCROP NORTH OF 6TH BASELINE ALONG HIGHWAY NO. 304, 27.4 KM NORTHEAST OF POST OFFICE, 24.6 KM NORTH OF JUNCTION WITH HIGHWAY NO. 11 (CLARK'S CORNERS), 6.3 KM SOUTHEAST OF BRIDGE OVER O'HANLY RIVER, TABLET IN TOP 80 M EAST OF CENTRE LINE, 45 M NORTH OF BASE LINE. ESTABLISHED BY MANITOBA SURVEYS & MAPPING BRANCH.

HISTORICAL COORDINATES NOTE: Coordinates listed below are no longer maintained by GSD and should be verified with your provincial agency before use.

Horizontal Datum : NAD83
Method : Multiple Methods
Latitude : N50° 44' 50.77787"
Longitude : W96° 08' 57.33541"
UTM : Zone = 14 N = 5625615.209 m E = 701102.835 m

Horizontal Datum : NAD27
Method : Doppler Positioning
Latitude : N50° 44' 50.74234"
Longitude : W96° 08' 56.31101"
UTM : Zone = 14 N = 5625396.295 m E = 701129.635 m

PROJECTS IDENTIFIERS:
50096 VA2M77 DOPPLER JUNCTION GPS FRMNAD83 JUNE90 SECDOP

Station 2 of 2

SITE IDENTIFICATION

Unique Number : 82R311
Name : 82R311
Established By : Man. Dept. Of Natural Resources (Surveys And Mapping Branch)
Province : MB
Prov. Identifier : None
NTS Map No : 062I14

STATION COORDINATES

Horizontal Datum : NAD83CSRS
Method : Global Positioning System
Latitude : N50° 56' 57.3069" +/- 0.002 m Std Dev. (68% confidence level)
Longitude : W97° 02' 19.0901" +/- 0.002 m Std Dev. (68% confidence level)
Ellipsoidal Height : 192.80 m +/- 0.012 m Std Dev. (68% confidence level)
Geoid Separation (HTv2.0) : -30.078 m
Agency : Geodetic Survey Division
Adjustment Net : M01707
Epoch : 1997
UTM : Zone = 14 N = 5646013.16 m E = 637772.67 m
XYZ Coords.: = X = -493406.40 m Y = -3996193.01 m Z = 4930139.51 m

VERTICAL DATA

Vertical Datum : CGVD28
Elevation : 222.881 m
Order : First Order
Method : Differential
Adjustment Line : CP89208
Published Year : 1989

STATION MARKER INFORMATION AND LOCATION

Marker Type : Permanent Agency Marker
Inspected in : 1996
Status: Good Inspection Comments : None
Accessible by passenger car or light truck and a walk of less than 50 m

RIVERTON

MANITOBA GOVERNMENT HELIX PIPE BENCH MARK NEAR NORTHEAST CORNER OF SECTION 36-22-03 EPM, 4.9 KM SOUTH AND 1.7 KM WEST OF JUNCTION OF HIGHWAYS NOS 8 AND 329, 0.2 KM EAST OF GRAVEL ROAD ALLOWANCE ALONG EAST BOUNDARY OF SECTION 36-22-03 EPM, ABOUT 50 M SOUTH OF LEGAL SURVEY MONUMENT AT NORTHEAST CORNER OF SECTION 36, ON SOUTH SIDE OF ROAD ALLOWANCE, 20.5 M SOUTH OF FENCELINE ALONG NORTH SECTION BOUNDARY, 4.3 M EAST OF MARKER POST AND A NORTH-SOUTH FENCE LINE 50 CM BELOW GROUND LEVEL.

HISTORICAL COORDINATES NOTE: Coordinates listed below are no longer maintained by GSD and should be verified with your provincial agency before use.

Horizontal Datum : NAD83
Method : Multiple Methods
Latitude : N50° 56' 57.29346"
Longitude : W97° 02' 19.06188"
UTM : Zone = 14 N = 5646012.756 m E = 637773.231 m

Horizontal Datum : NAD27
Method : Inertial Survey System
Latitude : N50° 56' 57.28319"
Longitude : W97° 02' 17.86104"
UTM : Zone = 14 N = 5645794.479 m E = 637801.267 m

PROJECTS IDENTIFIERS:
50097 CP89208 JUNCTION FRMNAD83 GPS JUNE90 VA_ADJ

Process date: 2007-05


Process contact:
Contact information:
Contact organization primary:
Contact organization: Terrapoint Canada Inc

Contact instructions:
http://www.Terrapoint.com

Process step:
Process description:
Processing.

GPS, IMU, and rangefinder data were processed to obtain XYZ coordinates of surveyed points using Applanix & Optech processing software. 
Airborne GPS kinematic data was processed on-site using GrafNav kinematic On-The-Fly (OTF) software. Flights were flown with a minimum of 6 satellites in view (13o above the horizon) and with a PDOP of better than 4.5. Distances from base station to aircraft were kept to a maximum of 35 km, to ensure a strong OTF (On-The-Fly) solution. For all flights, the GPS data can be classified as excellent, with GPS residuals of 5cm average but no larger than 9 cm being recorded. Calculation of 3D laser points (raw data) The post-processing software to derive X, Y, Z values from roll, pitch, yaw, and range is Optech's Realm.

Process date: 2007-05


Process contact:
Contact information:
Contact person primary:
Contact organization: Terrapoint Canada Inc

Contact instructions:
http://www.Terrapoint.com

Process step:
Process description:
Post-processing
Carried Out April, 2007 
The data was processed using the software TerraScan, and following the methodology described herein. The initial step is the setup of the TerraScan project, which is done by importing client provided tile boundary index encompassing the entire project areas. The 3D laser point clouds, in binary format, were imported into the TerraScan project and divided into tiles. Once tiled, the laser points were classified using a proprietary routine in TerraScan. This routine removes any obvious outliers from the dataset following which the ground layer is extracted from the point cloud. The ground extraction process encompassed in this routine takes place by building an iterative surface model. This surface model is generated using three main parameters: building size, iteration angle and iteration distance. The initial model is based on low points being selected by a "roaming window" with the assumption is that these are the ground points. The size of this roaming window is determined by the building size parameter. The low points are triangulated and the remaining points are evaluated and subsequently added to the model if they meet the iteration angle and distance constraints. This process is repeated until no additional points are added within an iteration. A second critical parameter is the maximum terrain angle constraint, which determines the maximum terrain angle allowed within the classification model. The data is then manually quality controlled with the use of hillshading, cross-sections and profiles. Any points found to be of class vegetation, building or error during the quality control process, are removed from the ground model and placed on the appropriate layer. An integrity check is also performed simultaneously to verify that ground features such as rock cuts, elevated roads and crests are present. Once data has been cleaned and complete, it is then reviewed by a supervisor via manual inspection and through the use of a hillshade mosaic of the entire project area.

Process date: 2007-05


Process contact:
Contact information:
Contact person primary:
Contact organization: Terrapoint Canada Inc

Contact instructions:
http://www.Terrapoint.com

Process step:
Process description:
Surface generation All return data exported, not gridded, with intensity values in comma delimited ASCII and LASv1.0 format. Bare Earth data exported, not gridded, in comma delimited ASCII and LASv1.0 format. Surface generation Bare Earth Point Data (DTM) Ground returns were used to construct a triangulated irregular network (TIN) which was then sampled at 1m intervals to produce the ESRI ASC grid.

Process date: 2007-05


Process contact:
Contact information:
Contact person primary:
Contact organization: Terrapoint Canada Inc

Contact instructions:
http://www.Terrapoint.com

Process step:
Process description:
1m grid in ascii (x, y, z) format received from Terrapoint Inc. are unzipped and the file extension renamed to .txt. An AML called ld_fmttxtshore.aml was run against the text files to format the files properly. Another AML called ld_lidar_grid.aml is used to create the 1m grid files. The grid files are merged together using MERGE.

Process software and version: ArcInfo 9.2
Process date: 2007-12


Process contact:
Contact information:
Contact person primary:
Contact person: Lindsay Donnelly
Contact organization: Manitoba Conservation
Contact position: GIS Specialist


Contact address:
Address type: mailing and physical address
Address:
200 Saulteaux Crescent
City: Winnipeg
State or province: Manitoba
Postal code: R3J3W3
Country: Canada

Contact voice telephone: 204-945-5526
Contact facsimile telephone: 204-945-2385


Contact electronic mail address: lindsay.donnelly@gov.mb.ca


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Spatial Data Organization Information:


*Direct spatial reference method: Raster


Raster object information:
*Image format:
*Number of bands: 1


*Row count: 87483
*Column count: 50257
*Vertical count: 1


*Cell size X direction: 1.000000
*Cell size Y direction: 1.000000


*Bits per pixel: 32
*Pyramid layers: FALSE
*Image colormap: FALSE
*Compression type: Default


*Raster object type: Grid Cell
*Raster object type: Grid Cell
*Raster display type: matrix values
*Raster origin: Upper Left


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Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Projected coordinate system name: NAD_1983_UTM_Zone_14N
*Geographic coordinate system name: GCS_North_American_1983

Planar:
Grid coordinate system:
*Grid coordinate system name: Universal Transverse Mercator
Universal Transverse Mercator:
*UTM zone number: 14
Transverse mercator:
*Scale factor at central meridian: 0.999600
*Longitude of central meridian: -99.000000
*Latitude of projection origin: 0.000000
*False easting: 500000.000000
*False northing: 0.000000

Planar coordinate information:
*Planar coordinate encoding method: row and column
Coordinate representation:
*Abscissa resolution: 1.000000
*Ordinate resolution: 1.000000
*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 definition:
Altitude system definition:
Altitude datum name: CGVD28 (ntv2)
Altitude distance units: Meters

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Entity and Attribute Information:


Overview description:
Dataset overview:
There are no other attributes other than the elevation values and the encoded values for easting and northing coordinates. There are no attached attribute tables.

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Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact organization: Manitoba Water Stewardship

Resource description: Downloadable Data


Standard order process:
Digital form:
Digital transfer information:
*Transfer size: 487.655
*Dataset size: 487.655

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Metadata Reference Information:


*Metadata date: 20080221


*Language of metadata: en


Metadata contact:
Contact information:
Contact person primary:
Contact person: Joe Sackett
Contact organization: Terrapoint Canada Inc
Contact position: Sr. Data Analyst


Contact address:
Address type: mailing address
Address:
2400, 639 5th Avenue SW
City: Calgary
State or province: AB
Postal code: T2P 0M9
Country: Canada

Contact voice telephone: 877-999-7687


Contact electronic mail address: joe.sackett@Terrapoint.com


*Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata
*Metadata standard version: FGDC-STD-001-1998
*Metadata time convention: local time


Metadata extensions:
Online linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile name: ESRI Metadata Profile

Metadata extensions:
*Online linkage: http://www.esri.com/metadata/esriprof80.html
*Profile name: ESRI Metadata Profile

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Binary Enclosures:


Thumbnail:
Enclosure type: Picture



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