Soil-Adjusted Vegetation Index (SAVI) derived from 2010 National Agriculture Imagery Program (NAIP) data for the central Arizona region

This project calculates the Soil-adjusted Vegetation Index (SAVI) from 2010 National Agriculture Imagery Program (NAIP) imagery (1-meter resolution) for the central Arizona region. Because of their large size, data (as GeoTIFF files) for each survey year are provided as multiple individual tiles each comprising a portion of the overall coverage area. An index of the relative position of each tile in the coverage area is provided as a pdf and kml where the tile index contains a portion of the GeoTIFF file name (e.g., the relative position of the data file NAIP_SAVI_CAP2010-0000000000-0000000000.tif to the overall coverage area is identified by the index id 0000000000-0000000000 in the pdf and kml index maps). Javascript code used to process SAVI values is included with this dataset.

本项目基于亚利桑那州中部区域2010年美国农业部农业影像计划（National Agriculture Imagery Program, NAIP）的1米分辨率遥感影像，计算土壤调节植被指数（Soil-adjusted Vegetation Index, SAVI）。鉴于单份数据体量庞大，每个调查年度的GeoTIFF格式数据均被拆分为多个独立瓦片，各瓦片仅覆盖整体研究区域的局部范围。数据集附带一份索引文件，以PDF和KML格式提供，用于标注各瓦片在整体覆盖区域中的相对位置；该索引包含对应GeoTIFF文件的部分文件名，例如数据文件NAIP_SAVI_CAP2010-0000000000-0000000000.tif在整体覆盖区域中的相对位置，可通过PDF与KML索引地图中的索引ID 0000000000-0000000000进行识别。本数据集同时附带用于计算SAVI值的JavaScript代码。