森林における地上レーザースキャニング:個々の木のパラメータの測定の精度と効率
Zhangmai Li1, Qinghua Qiao2, Zibin Han3
1The College of Resource Environment and Tourism, Capital Normal University, Beijing, China.
PloS one
|September 5, 2025
まとめ
地上レーザースキャニング (TLS) は森林の在庫調査の可能性を示していますが,単発スキャンの樹高の精度は限られています. 適度な木検知と50m以内のDBHの精度を提供し,プロット測定を支援します.
科学分野:
- 林業科学
- リモートセンシング技術
- 地理空間分析
背景:
- 森林資源の正確な監視は 世界的に極めて重要です
- 地上レーザースキャン (TLS) は,効率的かつ正確な森林データ取得を提供します.
- 限定的な研究は,個々のツリーパラメータの単一のステーション,単一のスキャンTLSの精度を評価します.
研究 の 目的:
- 個々の木のパラメータ (位置,高さ,DBH) を取得するTLSの精度を体系的に評価する.
- 単回スキャン TLS データの有効性を評価する.
- TLSベースの森林プロット測定の検証を行う.
主な方法:
- TLS,空中レーザースキャニング (ALS),および検証のためのフィールド測定を使用した.
- 樹木の高さと胸高の直径 (DBH) を含む構造パラメータを分析した.
- 木の位置の精度と,半径50m以内の検出率を調べました.
主要な成果:
- シングルスキャンのTLSは木の高さの推定に限られた精度を示した (RMSE:Populusは11.61m,Styphnolobiumは2.13m).
- 50m以内の樹木検出率 55.96-64.26%を達成しました.
- 報告されたDBH RMSEは1.60cm (9.03%RRMSE) であり,個々の木の点RMSEは0.11mである.
結論:
- TLSは森林調査の有効なツールとしての可能性を 示しています
- この発見は,正確な木の高さ取得のためのシングルスキャンTLSの限界を強調しています.
- 結果は,TLSから派生した森林プロットデータの信頼性を評価するための基礎を提供します.
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