Figure 1
Figure 2
Model parameters (ALS) with RSE the model residual error and DF the number of indicated degrees of freedom_ The determination coefficient R2 for the nonlinear model (3) is an estimate_ Insignificant values (p > 0_05) are in italics_Tabel 2_ Mudelite parameetrid (lidarandmetest)_ RSE on mudeli jääkviga, DF on vabadusastmete arv_ Mittelineaarse mudeli (3) determinatsioonikordaja R2 kohta on antud hinnang_ Mitteolulised väärtused (p > 0_05) on kursiivis_
| Model | Data | Parameters / Parameetrid | ||||||
|---|---|---|---|---|---|---|---|---|
| a | b | c | d | RSE (m) | R2 | DF | ||
| 3 | 2017 | 2.59 | 0.023 | − | − | 28.3 | *0.64 | 97 |
| 2019 | 1.98 | 0.016 | − | − | 26.3 | *0.69 | 97 | |
| 4 | 2017 | 14.3 | 8.02 | − | − | 24.8 | 0.55 | 97 |
| 2019 | 18.5 | 8.11 | − | − | 25.1 | 0.53 | 97 | |
| 5 | 2017 | 4.59 | 6.08 | 0.362 | − | 23.9 | 0.59 | 96 |
| 2019 | 2.72 | 5.26 | 0.506 | − | 23.8 | 0.59 | 96 | |
| 6 | 2017 | 39.9 | 7.43 | 0.309 | −0.610 | 21.8 | 0.66 | 95 |
| 2019 | 28.4 | 7.73 | 0.438 | −0.655 | 21.3 | 0.67 | 95 | |
Description of the 70 sampling transects that were used for visibility prediction based on the forest inventory data_ G is basal area, H100 the site index_ A transect may extend over several forest stands_Tabel 1_ Takseertunnustele tuginevas nähtavuse simulatsioonkatses kasutatud vaatlustrasside kirjeldus neile jäävate eraldiste andmete põhjal_ G on rinnaspindala, H100 on kõrgusindeks_
| Dominant species | Age (yr) | G (m2 ha−1) | H100 (m) | Count of stands |
|---|---|---|---|---|
| Pinus sylvestris L. | 85 (23–158) | 26 (2–45) | 24 (10–34) | 45 |
| Betula pendula Roth, B. pubescens Ehrh. | 49 (22–93) | 20 (5–33) | 28 (18–33) | 28 |
| Picea abies (L.) H. Karst. | 60 (38–117) | 24 (11–30) | 30 (23–34) | 15 |
| Alnus glutinosa (L.) Gaertn. | 58 (22–77) | 22 (9–29) | 27 (24–34) | 5 |
| Larix spp. | 33 | 24 | 40 | 1 |
| Alnus incana (L.) Moench | 20 | 14 | 30 | 1 |