Mapping Canadian boreal forest vegetation using pigment and water absorption features derived from the AVIRIS sensor
Bibliographic record
Abstract
Using imagery of the Canadian boreal forest, we explored the ability of the Airborne Visible Infrared Imaging Spectrometer (AVIRIS) to map vegetation type by taking advantage of pigment and water absorption features. Two techniques were exploited. In the first classification routine, laboratory‐acquired leaf spectra representing different “pigment classes” were used in a spectral unmixing procedure to map the relative abundance of pigments in the landscape. The resulting images were then used in a maximum likelihood routine to map the distribution of vegetation cover types. Accuracies for this method range between 66.6–80.1%, when compared to a vegetation map prepared by the Saskatchewan Environment and Resource Management (SERM), Forestry Branch Inventory Unit (FBIU). In the second approach, seven indices of vegetation structure and physiological function were calculated from AVIRIS. Cover types were then derived using the index images as inputs in a maximum likelihood classification. Levels of accuracy for this method were between 56.6 and 73.3%, when compared to the same vegetation map. Both of these complementary techniques were able to differentiate important vegetation types such as fen, deciduous trees, and wet and dry conifers at accuracies superior to other well‐established classification methods for this area. This improved vegetation classification can now be used to evaluate regional surface‐atmosphere fluxes of carbon and water vapor.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".