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TitleMedium resolution land cover mapping of Canada from SPOT 4/5 data
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AuthorOlthof, I; Latifovic, R; Pouliot, D
SourceGeomatics Canada, Open File 4, 2015, 37 pages, https://doi.org/10.4095/295751 (Open Access)
Year2015
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatpdf
ProvinceBritish Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
Subjectsgeophysics; environmental geology; remote sensing; landscape types; vegetation; Landsat; SPOT; land cover
Illustrationssatellite imagery; satellite images; tables
ProgramLand Surface Characterization, Remote Sensing Science
Released2015 01 28
AbstractMedium resolution land cover is one of the most widely used geospatial datasets for environmental assessment in Canada. Canada's current coverage is from circa-2000 Landsat and is therefore becoming out-of-date. With an update of the medium resolution orthoimage coverage of Canada from circa-2000 30 m Landsat to 2005 - 2010 20 m SPOT 4-5 imagery, an opportunity presented itself to update Canada's land cover with improved spatial resolution. Previous experience mapping the Northern Land Cover of Canada (NLCC) taught us to efficiently map at the national scale from Landsat, however the SPOT dataset required new approaches to deal with problems related to phenology and a smaller image footprint compared to Landsat. This paper presents solutions to the problems of radiometric normalization and classification extension with the objective of producing a consistent and accurate medium resolution national scale land cover. A 20 m SPOT land cover of Canada's forested regions at a 16-class thematic level is presented with full validation using nearly 1600 reference points across Canada. The overall accuracy of the product is 71% for strict assessment and 85% if relaxed to account for geolocation errors. An assessment of the product along the treeline ecotone suggests an improvement over existing land cover, while northward the product merges better with the existing circa-2000 Northern Land Cover of Canada from Landsat.
Summary(Plain Language Summary, not published)
This Open File presents justification for creation of a current medium resolution land cover product of the forested region of Canada from 20 m SPOT data purchased by the GoC. Methods developed and applied to generate the product are presented. The product itself is validated against ground truth data collected across Canada and evaluated and compared to existing medium resolution land cover. Finally, the product is generalized and merged with the Northern Land Cover of Canada from Landsat that was produced by CCRS previously to demonstrate the capacity for national-scale mapping from medium resolution optical data.
GEOSCAN ID295751