Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Chowdhury, S.
Originator: Chao, D.K.
Originator: Shipman, T.C.
Publication Date: 201811
Title:
Land Disturbances of the Upper Peace Region of Alberta, derived from 1985 to 2015 Landsat Multispectral Data (image data, TIFF format)
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2018-0014
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: http://ags.aer.ca/document/DIG/DIG_2018_0014.zip
Description:
Abstract:

This dataset of land disturbances of the Upper Peace Region of Alberta is derived from selected Landsat multispectral datasets captured in 5-year intervals from 1985 to 2015. Disturbances were detected through time-series comparison of the selected datasets, classified based on the time of first appearance on the landscape, and then attributed to four major disturbance types:

1) energy footprints (oil, gas, and coal mining activities), 2) non-energy footprints (other infrastructure), 3) cutblocks (primarily forest harvesting), and 4) wildfire. The disturbance-type data are stacked to create a 4-band TIFF image with each band representing the time-series data for one of the four disturbance types.

Purpose:
To provide a baseline land disturbance dataset and to assist regulatory planning, compliance monitoring, reclamation assessment, and sustainable development in the Upper Peace Region of Alberta.
Supplemental Information: Language: In English;
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1985
Ending Date: 2015
Currentness Reference: ground condition
Status:
Progress: In work
Maintenance and Update Frequency: Unknown
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -116
North Bounding Coordinate: 58
South Bounding Coordinate: 53
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: geology
Theme Keyword: land disturbance
Theme Keyword: land use
Theme Keyword: land use planning
Theme Keyword: landsat
Theme Keyword: landsat 8
Theme Keyword: raster grid
Theme Keyword: remote sensing
Theme Keyword: vegetation recovery
Place:
Place Keyword Thesaurus: none
Place Keyword: 83e
Place Keyword: 83f
Place Keyword: 83k
Place Keyword: 83l
Place Keyword: 83m
Place Keyword: 83n
Place Keyword: 84c
Place Keyword: 84d
Place Keyword: 84e
Place Keyword: 84f
Place Keyword: alberta
Place Keyword: canada
Access Constraints: Public
Use Constraints:
Acknowledgement of the Alberta Energy Regulator/Alberta Geological Survey as the originator/source of this information is required as described in the Open Government License - Alberta.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Chowdhury, S.
Originator: Chao, D.K.
Publication Date: 201805
Title:
Time-Series Land-use/Land-cover Classifications of the Upper Peace Region of Alberta, Derived from 1985 to 2015 Landsat Multispectral Data (image data, TIFF format)
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2018-0004
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: http://www.ags.aer.ca
Data Quality Information:
Attribute Accuracy:
Attribute Accuracy Report:

Attribute Accuracy Report: The overall accuracy, defined as the total correct pixels divided by the total number of pixels in the error matrix N. The Producer accuracy is an indication of the probability of a reference pixel being correctly classified. It is calculated as the total number of correct classified pixels in a class divided by total number of pixels in that class. The User accuracy is defined as the total number of correct classified pixels in a class divided by total number of pixels that were classified in that class. It indicates the probability that a pixel classified on the map represents that class on the ground. The Kappa coefficient is used to find out if the accuracy level is significantly better than a random result, providing a better comparison of different classifications.

Accuracy assessment of the land disturbance dataset was conducted based on the 1985 - 2010 forest disturbance data (http://opendata.nfis.org/mapserver/nfis-change_eng.html) from the Canadian Forest Service/Pacific Forestry Centre since forest disturbances are considered as a subset of the cumulative land disturbances.

Overall Accuracy = (3537442/3977538) 88.9355%

Kappa Coefficient = 0.8581

Year-to-Year Land Change|Producer Accuracy (%)|User Accuracy (%)|Producer Accuracy (Pixel Ratio)|User Accuracy (Pixel Ratio)

2005-2010|86.31|89.81|692981/802917|692981/771588|

2000-2005|87.99|88.47|657743/747512|657743/743503|

1995-2000|92.41|90.00|1161119/1256430|1161119/1290199|

1990-1995|86.28|86.92|478064/554110|478064/549996|

1985-1990|88.80|87.99|547535/616569|547535/622252|

Logical Consistency Report: The datasets are in GeoTIFF format that have no null values.
Completeness Report:
All pixels in the annual Landsat cloud-free composite datasets were used for image analysis. Every pixel in the raster grid is classified to a certain class, except for the pixels with the presence of sensor noise or thick cloud. Pixels with sensor noise or thick cloud and pixels outside the study area were assigned ‘0’ value.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
Time-series land change detection product has 30 m spatial resolution, which is the same as the Landsat dataset.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: White, J.C.
Originator: Wulder, M.A.
Originator: Hermosilla, T.
Originator: Coops, N.C.
Originator: Hobart, G.W.
Publication Date: 2017
Title:
A nationwide annual characterization of 25 years of forest disturbance and recovery for Canada using Landsat time series
Geospatial Data Presentation Form: remote-sensing image
Publication Information:
Publication Place: Victoria, BC, Canada
Publisher: Remote Sensing of Environment
Other Citation Details: Volume 194; Pages 303-321
Online Linkage: https://doi.org/10.1016/j.rse.2017.03.035
Source Scale Denominator: 0
Type of Source Media: disc
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1984
Ending Date: 2012
Source Currentness Reference: publication date
Source Citation Abbreviation: CIT 7577
Source Contribution: Annual Landsat cloud-free composites (mid-summer)
Process Step:
Process Description:

Process steps performed in ENVI 5.4 to produce this land disturbance classification dataset:

1. Pre-release versions of annual Landsat Best Available Pixel Composite (LBAPC) data from 1984 to 2012 with 30 m spatial resolution were obtained from the Natural Resources Canada/Pacific Forestry Centre for testing purposes. Of these, the 1985, 1990, 1995, 2000, 2005 to 2010 data were used as inputs to produce the time-series Land Use and Land Cover (LULC) classification stack. In addition, 2015 LBAPC data were produced in-house using the Google Earth Engine.

2. Normalized Difference Built-up Index (NDBI) imageries were produced from 1985 to 2015 LBAPC datasets with a 5-year gap.

3. Change detection results were produced by subtracting initial state NDBI (e.g., 1985) from the final state NDBI (e.g., 1990) for every 5-year gap from 1985 to 2015. The change detection result with NDBI difference from 0.2 to 1 was assigned as land disturbance.

4. A land disturbance map was produced with disturbances classified based on the time interval within which they first appeared on the landscape, i.e., in chronological order from the earliest to the latest: 1985-1990, 1990-1995, 1995-2000, 2000-2005, 2005-2010, 2010-2015.

5. The disturbances were attributed to one of four major disturbance types (i.e., energy footprints, non-energy footprints, cutblocks, or wildfire) based on the information from ancillary geospatial datasets: Digital Integrated Dispositions (DIDs), wildfire, and forestry data from the Alberta Agriculture and Forestry and Alberta Environment and Parks.

The process steps were adapted from the following journal paper.

Chowdhury, S., Chao, D.K., Shipman, T.C. and Wulder, M.A. (2017): Utilization of Landsat data to quantify land-use and land-cover changes related to oil and gas activities in West-Central Alberta from 2005 to 2013; GIScience and Remote Sensing, v. 54, no. 5, p.700–720, at http://dx.doi.org/10.1080/15481603.2017.1317453.

Process Date: 2018
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Distribution Liability:
The Alberta Energy Regulator/Alberta Geological Survey (AER/AGS) licenses this information under the Open Government License - Alberta. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the AER/AGS of any manufacturer's product.
Metadata Reference Information:
Metadata Date: 20181123
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Access Constraints: none
Metadata Use Constraints: none