Table Head | Site index | ER | TWI | TPI | DE | OP | SR | DS | EL |
Effective relief (ER) | 0.749*** |
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Topographic wetness index (TWI) | 0.396*** | 0.372*** | 1 |
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Topographic position index (TPI) | −0.689*** | −0.681*** | −0.669*** | 1 |
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Degree of exposure (DE) | −0.289*** | −0.432*** | −0.070 | 0.128* | 1 |
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Openness (OP) | −0.729*** | −0.730*** | −0.542*** | 0.884*** | 0.251*** | 1 |
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Solar radiation (SR) | −0.473*** | −0.475*** | 0.100 | 0.407*** | 0.126* | 0.625*** | 1 |
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Distance from the sea (DS) | −0.093 | 0.142** | −0.059 | −0.028 | −0.234*** | −0.041 | 0.314 | 1 |
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Elevation (EL) | −0.307*** | −0.068 | −0.178** | 0.171** | 0.044 | 0.149** | 0.116* | 0.809*** | 1 |