NASA EOS LAND VAL Project

This data set provides field measurements of diameter, tree height, and crown dimensions for 1,513 trees in 30 plots at the La Selva Biological Station in Costa Rica. Fourteen of these plots were in undisturbed primary forest, six were in primary forest which had been selectively logged, seven were secondary forests, and three were abandoned pastures reverting to forest. The diameter and height data were used to calculate aboveground biomass for each of the 30 plots. The crown measurements were used to estimate a vertical profile for each plot, showing the vegetation volume in 1 meter incremen...本数据集提供了哥斯达黎加拉塞尔瓦生物站（La Selva Biological Station）30块样地内1513株林木的实地测量数据，涵盖胸径、树高及冠幅维度指标。其中14块样地位于未受干扰的原始林，6块为经择伐的原始林，7块为次生林，剩余3块为已撂荒并正向森林群落演替的牧场。研究人员利用胸径与树高数据，计算了30块样地各自的地上生物量；冠层测量数据则被用于估算每块样地的垂直剖面，展示以1米为间隔的植被体积……