草地植被盖度的近距离遥感测定

Measuring coverage of grassland vegetation using remote sensing over short distances

盖度或者覆盖度是植物群落结构的一个重要数量指标。通常的目视估测植物群落盖度方法不仅精度低,而且因人而异。本研究采用近距离遥感方法测定草地植物群落盖度,该方法主要包括数据获取、图像处理、像元数量提取和盖度计算4个部分。精度评价表明,该方法测定的绿色植被盖度误差很小,与目视估测方法比较,它具有客观、一致和精度高的优点。

Coverage is an important quantitative index for plant community structure. In general, the method of visual estimation for the coverage of plant communities has not only low precision, but also a variety of results with different persons. A method measuring coverage of grassland communities using remote sensing over short distances is suggested in this paper. This method has four parts： data acquisition, image processing, pixel number extraction and coverage calculation. , Based on the precision assessment, the error is very small, and it has advantages such as objectivity, consistency and high precision, compared with visual estimation methods.