STRATEGIC ALTERNATIVES TO CALCULATE CROP AREA OF AN ADMINISTRATIVE DIVISION

摘要

In crop yield estimation using remotely sensed data, it usually needs to calculate the crop planting area in a particular administrative division. Most previous investigators do as follows: first, they cut down the target image of the study area with the administrative boundary, then conduct land cover/use classification and crop identification work, and last calculate the crop area. Other fewer researchers conduct the land cover/use classification work first and then cut down the study area with administrative boundary, and last calculate the crop area. We call these two methods strategy Acut and classify) and strategy B (classify and cut) respectively. In this paper, we applied these two strategies to rice planting area identification. Our results indicate that strategy B is obviously excellent than strategy A in the unsupervised classification-cluster process and the rice area accuracy it extracted is over 84percent.