Data · dataset · 2022
Snag Detection In The Interior Douglas-Fir Zone Of British Columbia Using Area-Based Lidar Metrics
Listed in Borealis and Agri-environmental Research Data Dataverse — shown once because both records carry DOI 10.5683/sp3/3jqzbk
Snags (dead standing trees) form an important structural aspect of a forest and perform many essential ecological functions such as habitat provision.
Description
As such, substantial research has investigated various methods of snag detection using lidar. One approach is to compute areal lidar metrics such as slope, elevation, canopy height, etc. to detect snags.
However, it remains unclear which lidar metrics are best suited for snag detection. This study attempted to predict snag presence/absence and density in the Interior Douglas-Fir (IDF) zone in British Columbia using area based lidar metrics. A suite of 88 lidar metrics based on previous research were tested to predict snag presence/absence for ≥5cm, ≥20cm, and ≥30cm DBH classes in 20 plots.
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Metrics included topographic, height, intensity, and canopy structure indices. Snag presence/absence was classified for each DBH class using random forests (RF) modelling. Metrics used for RF model were selected using the Boruta algorithm.
Overall accuracies for classification by DBH class ranged from 81-92% with kappa values between 0.59-0.82. While different sets of metrics were selected for each DBH class, canopy gap frequency was an important metric across DBH classes. Snag density was estimated for the ≥5cm class using RF regression, yielding an R2 = 0.80.
Overall, this study demonstrated the effectiveness of area based lidar metrics for estimating snag presence in the IDF zone for larger DBH snags, and density for smaller DBH snags.
Links
Where it is published
- Dataverse dataset page borealisdata.ca/dataset.xhtml?persistentId=doi%3A10.5683%2FSP3%2F3JQZBK ↗
landing page · from borealisdata ca
- DOI doi.org/10.5683/sp3/3jqzbk ↗
DOI / persistent id · from borealisdata ca
Catalogue records · 1
- Dataverse API borealisdata.ca/api/datasets/:persistentId/?persistentId=doi%3A10.5683%2FSP3%2… ↗
metadata API · from borealisdata ca
Topics
- Stated by source
- Computer and Information Science · Computer and Information Science · Earth and Environmental Sciences · Earth and Environmental Sciences
- From keywords
- Chemistry · Computer Science & AI · Earth & Environmental Science · Earth & Environmental Science · Economics & Finance · Engineering · Humanities · Life Sciences · Mathematics & Statistics · Medicine & Health · Ocean & Atmospheric Science · Social Science
- Inferred from text
- Forestry sciences 68%
Provenance · 2 source records, 23 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| Borealis | doi:10.5683/SP3/3JQZBK | 13 d ago | JSON v1 |
| Agri-environmental Research Data Dataverse | doi:10.5683/SP3/3JQZBK | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
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| concepts[field].dataverse_subject:computer-and-information-science | source · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].dataverse_subject:earth-and-environmental-sciences | source · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].dataverse_subject:earth-and-environmental-sciences | source · borealisdata ca | connector:borealisdata_ca@1.0.0 | /subjects |
| concepts[field].local:field:chemistry | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:computer-science-ai | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:earth-environmental | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:earth-environmental | mapping · borealisdata ca | connector:borealisdata_ca@1.0.0 | /subjects |
| concepts[field].local:field:economics-finance | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:engineering | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:humanities | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:life-sciences | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
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| concepts[field].local:field:ocean-atmospheric | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| concepts[field].local:field:social-science | mapping · borealisdata ca dataverse | connector:borealisdata_ca_dataverse@1.0.0 | /subjects |
| created_date | source · borealisdata ca | connector:borealisdata_ca@1.0.0 | |
| description | source · borealisdata ca | connector:borealisdata_ca@1.0.0 | /description |
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