Metadata format: ISO 19139

Lake St. Martin 2m LiDAR GRID

Resource Identification Information

Citation
Title Lake St. Martin 2m LiDAR GRID


Presentation format mapDigital


Responsible party - originator
Organization's name ATLIS Geomatics Inc.


Themes or categories of the resource elevation


Place keywords
Keywords Lake St Martin, Manitoba, Canada


Thesaurus
Title Geographic Names Information System


Theme keywords
Keywords terrain, lidar, digital elevation


Thesaurus
Title Keywords


Descriptive keywords 
Keywords Downloadable Data


Thesaurus ArcIMS Metadata Service Content Types


Abstract
The project area is 978 tiles covering approximately 1951 square Kilometers in Southern Manitoba. The project design of the lidar data acquisition was developed to support a nominal post spacing of 1.0 meter. ATLIS Geomatics Inc. acquired 101 flights lines in 7 lifts from July 21, 2011 through July 30, 2011. Lidar data collection was performed with a Piper Navajo aircraft, utilizing a Optech Gemini sensor, collecting multiple return x, y, and z data as well as intensity data. Lidar data is remotely sensed high-resolution elevation data collected by an airborne collection platform.
Purpose
The purpose of this project is to collect and deliver topographic elevation point data derived from multiple return light detection and ranging (lidar) measurements.
Dataset language  English
Dataset character set utf8


Status completed
Maintenance
Update frequency notPlanned


Spatial representation type grid


Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.1.3510


Extent
Geographic extent
Bounding rectangle
Extent contains the resource  true
West longitude -98.770432
East longitude -97.891681
North latitude 52.041632
South latitude 51.241049

Credits
ATLIS Geomatics Inc. 1333 Dugald Road Winnipeg, MB R2J0H3 204.775.1211
Point of contact - owner
Individual's name Michelle Methot
Organization's name Manitoba Water Stewardship


Contact information
Phone
Voice (204)945-2181

Address
Delivery point Box 14 - 200 Saulteaux Cres
City Winnipeg
Administrative area Manitoba
Postal code R3J 3W3
Country CANADA

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Spatial Representation - Georectified

Number of dimensions 2
Axis dimensions properties
Dimension
Dimension name column
Dimension size 30000
Resolution
Distance 2.000000 Meter

Dimension
Dimension name row
Dimension size 44250
Resolution
Distance 2.000000 Meter

Cell geometry area
Transformation parameters are available  true
Point in pixel center




Check points are available false


Corner points
Point 516023.380000 5677194.460000
GML object unique identifier ID0E5IAC

Point 516023.380000 5765694.460000
GML object unique identifier ID0EEJAC

Point 576023.380000 5765694.460000
GML object unique identifier ID0EKJAC

Point 576023.380000 5677194.460000
GML object unique identifier ID0EQJAC

Center point
Point 546023.380000 5721444.460000
GML object unique identifier ID0EWJAC

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Content Information - Image Description

Type of information physicalMeasurement
Attribute described by cell values 
Nil reason missing


Band information
Minimum and maximum values Band_1
Longest wavelength 541.299988
Shortest wavelength 217.339996
Wavelength units
Catalog Symbol Meter
Codespace http://aurora.regenstrief.org/UCUM

Identifier Unified Code of Units of Measure
Codespace GML_UomSymbol
GML object unique identifier ID0AAAAAFAGA

Number of bits per value 32


Triangulation has been performed  false
Radiometric calibration is available  false
Camera calibration is available  false
Film distortion information is available  false
Lens distortion information is available  false


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Reference System Information

Reference system identifier
Value 26914


Codespace EPSG
Version 8.2.6

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Data Quality Information

Scope of quality information
Resource level dataset


Lineage
Process step
When the process occurred 2011-12-01 00:00:00
Description LiDAR DEMs were delivered by Atlis Geomatics as ascii xyz files with a horizontal spacing of 2m. Reformatted the xyz files in ArcInfo Workstation so that they were in the correct format for the CREATETIN command: ID, x,y,z (where the ID value = 1, indicating a MASS point). Converted xyz files to grids using the ArcInfo commands CREATETIN, TINARC, and POINTGRID. Loaded all DEM grids into an unmanaged raster catalog within a file geodatabase (coordinate systems defined as NAD_1983_UTM_Zone_14N). Converted the raster catalog to a 32 bit float raster dataset.


Process contact - distributor
Individual's name Tanya Dixon
Organization's name GeoManitoba Branch, Manitoba Conservation and Water Stewardship
Contact's position GIS Specialist


Contact information
Phone
Voice (204) 945-2586

Address
Delivery point 1007 Century Street
City Winnipeg
Administrative area Manitoba
Postal code R3H 0W4
Country CANADA
e-mail address Tanya.Dixon@gov.mb.ca

Process step
When the process occurred 2011-08-10 00:00:00
Description 1. Lidar, GPS, and IMU data was processed together using Applanix POSPac processing software. 2. Lidar data was transformed to the specified project coordinate system when imported into GeoCue software. 3. The lidar data set for each flight was checked for project area coverage and lidar post spacing was checked to ensure it meets project specifications. 4. The lidar collected at the project area was processed using Terrasolid products to correct the rotational, atmospheric, and vertical elevation differences that are inherent to lidar data. 5. Each lift was compared with all neighbors that contained overlapping areas to ensure calibration consistent across the AOI. 6. By utilizing the ground survey data collected at the project area, the lidar data was vertically biased to the ground. 7. Comparisons between the biased lidar data and ground survey data within the project area were evaluated and a final RMSE value was generated to ensure the data meets project specifications.


Source data
Level of the source data Ground control was provided to ATLIS Geomatics by KGS and AECOM


Source citation
Title Ground Control Survey


Data quality report - Conceptual consistency
Measure description Compliance with the accuracy standard was ensured by the collection of GPS ground control during the acquisition of aerial lidar and the establishment of a GPS base station operation airport. The following checks were performed. 1. The ground control and airborne GPS data stream were validated through a fully analytical boresight adjustment. 2. The Lidar elevation 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).


Data quality report - Quantitative attribute accuracy
Measure description The following methods are used to assure lidar accuracy. 1. Use of IMU and ground control network utilizing GPS techniques. 2. Use of airborne GPS in conjunction with the acquisition of lidar.


Data quality report - Absolute external positional accuracy
Measure description The minimum expected horizontal accuracy was tested during the boresight process to meet or exceed the National Standard for Spatial Data Accuracy (NSSDA). Horizontal accuracy is 75 centimeter RMSE or better.


Evaluation method Horizontal checks of lidar data are extremely difficult and costly. The quality of this datasets horizontal accuarcy can be inferred based on the very low RMSE in the vertical.


Quantitative test results
Value 0.0


Units
Nil reason missing
Data quality report - Absolute external positional accuracy
Measure description Vertical Accuracy RMSE(z) 9 cm


Evaluation method Once all lifts are completed with Boresight adjustment individually, technician shall check and correct the vertical mis-alignment of all flight lines and also the matching between data and ground truth. This process includes calculating the zbias value for each flight line so that all flight lines are aligned vertically and the entire data set match to the ground control points within the project specified accuracy range. The technician will run a final vertical accuracy check against the control after the z correction. The result will be analyzed against the project specified accuracy to make sure it meets the requirement. 24 control points were measured with a resulting 0.099m RMSE(z).


Quantitative test results
Value 0.099m


Units
Nil reason missing
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Distribution Information

Format
Name Raster Dataset
Version 
Nil reason missing


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Metadata Information

Last update 2015-07-07


Metadata contact - pointOfContact
Organization's name ATLIS Geomatics Inc.


Contact information
Phone
Voice Tel: (204) 775-1211

Address
Delivery point 1333 Dugald Road
City Winnipeg
Administrative area Manitoba
Postal code R2J0H3
Country CANADA

Scope of the data described by the metadata dataset


Metadata language  English
Metadata character set utf8


Name of the metadata standard used NAP - Metadata
Version of the metadata standard 1.2


Metadata identifier 
Nil reason missing


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