Metadata format: ISO 19139

Lake St. Martin 2m LiDAR GRID

Resource Identification Information

TitleLake St. Martin 2m LiDAR GRID

Presentation formatmapDigital

Responsible party - originator
Organization's nameATLIS Geomatics Inc.

Themes or categories of the resourceelevation

Place keywords
KeywordsLake St Martin, Manitoba, Canada

TitleGeographic Names Information System

Theme keywords
Keywordsterrain, lidar, digital elevation


Descriptive keywords 
KeywordsDownloadable Data

Thesaurus ArcIMS Metadata Service Content Types

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.
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 languageEnglish
Dataset character setutf8

Update frequencynotPlanned

Spatial representation typegrid

Processing environmentMicrosoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS

Geographic extent
Bounding rectangle
Extent contains the resourcetrue
West longitude-98.770432
East longitude-97.891681
North latitude52.041632
South latitude51.241049

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

Contact information

Delivery pointBox 14 - 200 Saulteaux Cres
Administrative areaManitoba
Postal codeR3J 3W3

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Spatial Representation - Georectified

Number of dimensions2
Axis dimensions properties
Dimension namecolumn
Dimension size30000
Distance2.000000 Meter

Dimension namerow
Dimension size44250
Distance2.000000 Meter

Cell geometryarea
Transformation parameters are availabletrue
Point in pixelcenter

Check points are availablefalse

Corner points
Point516023.380000 5677194.460000
GML object unique identifierID0E5IAC

Point516023.380000 5765694.460000
GML object unique identifierID0EEJAC

Point576023.380000 5765694.460000
GML object unique identifierID0EKJAC

Point576023.380000 5677194.460000
GML object unique identifierID0EQJAC

Center point
Point546023.380000 5721444.460000
GML object unique identifierID0EWJAC

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Content Information - Image Description

Type of informationphysicalMeasurement
Attribute described by cell values
Nil reasonmissing

Band information
Minimum and maximum valuesBand_1
Longest wavelength541.299988
Shortest wavelength217.339996
Wavelength units
Catalog SymbolMeter

IdentifierUnified Code of Units of Measure
GML object unique identifierID0AAAAAFAGA

Number of bits per value32

Triangulation has been performedfalse
Radiometric calibration is availablefalse
Camera calibration is availablefalse
Film distortion information is availablefalse
Lens distortion information is availablefalse

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Reference System Information

Reference system identifier


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Data Quality Information

Scope of quality information
Resource leveldataset

Process step
When the process occurred2011-12-01 00:00:00
DescriptionLiDAR 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 nameTanya Dixon
Organization's nameGeoManitoba Branch, Manitoba Conservation and Water Stewardship
Contact's positionGIS Specialist

Contact information
Voice(204) 945-2586

Delivery point1007 Century Street
Administrative areaManitoba
Postal codeR3H 0W4

Process step
When the process occurred2011-08-10 00:00:00
Description1. 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 dataGround control was provided to ATLIS Geomatics by KGS and AECOM

Source citation
TitleGround Control Survey

Data quality report - Conceptual consistency
Measure descriptionCompliance 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 descriptionThe 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 descriptionThe 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 methodHorizontal 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

Nil reasonmissing
Data quality report - Absolute external positional accuracy
Measure descriptionVertical Accuracy RMSE(z) 9 cm

Evaluation methodOnce 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

Nil reasonmissing
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Distribution Information

NameRaster Dataset
Nil reasonmissing

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Metadata Information

Last update2015-07-07

Metadata contact - pointOfContact
Organization's nameATLIS Geomatics Inc.

Contact information
VoiceTel: (204) 775-1211

Delivery point1333 Dugald Road
Administrative areaManitoba
Postal codeR2J0H3

Scope of the data described by the metadatadataset

Metadata languageEnglish
Metadata character setutf8

Name of the metadata standard usedNAP - Metadata
Version of the metadata standard1.2

Metadata identifier
Nil reasonmissing

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