| Title | Medium resolution land cover mapping of Canada from SPOT 4/5 data |
| Download | Downloads |
| Author | Olthof, I; Latifovic, R; Pouliot, D |
| Source | Geomatics Canada, Open File 4, 2015, 37 pages, https://doi.org/10.4095/295751 (Open Access) |
| Year | 2015 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut |
| NTS | 1; 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 |
| Subjects | geophysics; environmental geology; remote sensing; landscape types; vegetation; Landsat; SPOT; land cover |
| Illustrations | satellite imagery; satellite images; tables |
| Program | Land Surface Characterization, Remote Sensing Science |
| Released | 2015 01 28 |
| Abstract | Medium 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out-of-date.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 ID | 295751 |
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