Ministry of Environment
EcoCat:The Ecological Reports Catalogue
EcoCat Image

Report: Predictive Wetland Mapping of the Williston Drainage Basin: Update 2020

Report Documents
Map Plotfiles
Data Files
Digital Map Files
  • No files of this type available
Image Document
Video Files
  • No files of this type available
All Documents

  • No files available


  • If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact

Ministry of Environment and Climate Change Strategies with the financial support of Fish and Wildlife Compensation Program (Peace Region), to complete mapping of wetland and riparian units representing wetland extent and classification [e.g., fen, bog, marsh, swamp, flooded] using a Random Forest machine learning approach for the Williston Lake Watershed. BAPID=6538.

Author:  Filatow, D.; Harvey, G.; Cameron, E.; and Carswell, T.

Old Reference Number:  6538

Old Reference System:  BAPID

Date Published:  Jun 2020

Report ID:  58802

Audience:  Government and Public

The Ministry of Environment signed a Letter of Agreement with the Fish and Wildlife Compensation Program (FWCP) to map wetland and riparian areas within the FWCP Peace region as available ecosystem mapping products lacked coverage and were cost prohibitive to map the remainder of the area. This mapping project builds on the data and methodology developed in a previous project (BAPID 6492), with the goal to improve the understanding of abundance, distribution and connectivity of wetlands in the FWCP Peace. A Random Forest modelling approach was used to map riparian areas and wetlands across the 7.2 million hectare FWCP Peace region at a 25m pixel resolution. Improved 3-category (water, wetland, upland), 10-category (bog, fen, swamp, marsh, low-bench floodplain, mid-bench floodplain, high-bench floodplain, shallow water wetland, upland, and water) and 46-category predictive wetland raster maps were produced. Model results were validated using field observations collected during the summer of 2017, 2018, and 2019. The 3-category map is 86.7% accurate at predicting wetland, upland and water across the FWCP Peace Region, and had an internal model accuracy of 93% making it a reliable tool for use in wetland and riparian ecosystem planning and management. The 10-category map has an accuracy of 53% and should be used with caution. The 46-category raster prediction is not reliable and should not be used.When compared to models produced for BAPID 6492, model accuracy improved by 13% for the 3-category, and 7% for the 10-category predictions across the FWCP Peace region. At the sub-basin level, the 3-category prediction was improved by 3% in the Finlay sub-basin and 14% in the Parsnip sub-basin where new training points were added. Importantly, methods and products were specifically designed for openness and transparency, thereby increasing value through further use and extension opportunities. Further considerations for extending the product to a wetland management context, as well as data and model improvements as part of continuous improvement cycle are presented herein. Key results from this project include the 3-category raster prediction (20190926-103025_map_recl.tif), 10-category raster prediction (20190627_114031_map_recl.tif), and an Esri ArcGIS interactive mapping application (

Report Type
  Fish and Aquatic Habitat Information
  Biogeoclimatic Zone - BWBS Boreal White and Black Spruce Zone
  Biogeoclimatic Zone - ESSF Engelmann Spruce - Subalpine Fir Zone
  Biogeoclimatic Zone - SBS Sub-Boreal Spruce Zone
  Biogeoclimatic Zone - SWB Spruce - Willow - Birch Zone
  Region - Peace
  Vegetation - Riparian
  Watershed Groups - 230 - Peace River
  Watershed Groups - 236 - Parsnip River
  Watershed Groups - 239 - Finlay River

Warranty Disclaimer

This information is provided as a public service by the Government of British Columbia, Box 9411, Victoria, British Columbia, Canada V8W 9V1. This Web site and all of the information it contains are provided "as is" without warranty of any kind, whether express or implied. All implied warranties, including, without limitation, implied warranties of merchantability, fitness for a particular purpose, and non-infringement, are hereby expressly disclaimed. Limitation of Liabilities Under no circumstances will the Government of British Columbia be liable to any person or business entity for any direct, indirect, special, incidental, consequential, or other damages based on any use of this Web site or any other Web site to which this site is linked, including, without limitation, any lost profits, business interruption, or loss of programs or information, even if the Government of British Columbia has been specifically advised of the possibility of such damages.