LBA-ECO CD-04 LAI Estimated from Photos, km 83 Tower Site, Tapajos National Forest

This data set contains summary data for monthly leaf area index (LAI) and plant area index (PAI) at the km 83 Tower Site, in the Tapajos National Forest, Para, Brazil. LAI was estimated for hemispherical photographs of leaves collected between 2000 and 2003, using the histogram and gap-fraction analysis methods.

There are two data files with this data set: one comma-delimited ASCII data file with this data set which contains the monthly summary LAI and PAI data, and one compressed (*.zip) file that contains hemispherical photo images (.bmp) for 2000-2001. The images include those taken pre-logging and post-logging at the measurement site for the purpose of comparing LAI. In addition, there is a companion file containing a program code developed for LAI analysis provided as an ASCII text file.

本数据集收录了巴西帕拉州塔帕约斯国家森林83公里塔台站每月叶片面积指数（LAI）和植被面积指数（PAI）的概要数据。LAI系通过2000年至2003年间收集的叶片半球照片，运用直方图与间隙分数分析法进行估算。数据集包含两个数据文件：一个包含月度LAI和PAI概要数据的逗号分隔ASCII文本文件，以及一个包含2000-2001年半球照片图像（.bmp格式）的压缩文件（*.zip）。图像包括测量站点的采伐前后拍摄的照片，旨在对比分析LAI。此外，还附有一份用于LAI分析的程序代码，以ASCII文本文件的形式提供。