基于遥感技术的三七资源调查方法研究

目的:以三七为研究对象,以遥感技术为基础,探索栽培类药用植物资源调查的方法。方法:通过卫星遥感影像及实地勘测对选定的研究区域进行调查,确定最佳调查技术方案。结果:确定了研究区三七遥感调查的大致思路,包括遥感信息源的选择、图像的处理、解译、野外验证等。结论:对研究区域的三七进行了量测,计算出三七分布的面积、蕴藏量和产量。对于马关县,采用SPOT5(5 m)影像,相对判对率,与统计数据比较的相对面积、相对产量精度可分别达到92.7%,94.4%,78.2%,采用TM5(30 m),相对判对率和相对面积精度只能达到71.4%,58.8%;而在丘北县,用TM5(30 m),相对面积精度却可达到74.7%,表明针对不同的区域选择合适的信息源以及相应的处理方法,将基于遥感技术的资源调查方法应用于三七的资源调查是可行的。

Studies on the resources survey methods of Panax notogingseng based on remote sensing

Objective: To explore the survey methods for the cultivated medicinal plant resources such as Panax notogingseng based on remote sensing.Method: Through the preliminary study by remote sensing technique and field survey in the study area,the optimal methods in the procedure were chosen for the survey.Result: In this study,a set of survey method for P.notogingseng based on remote sensing technique was founded,which included the remotely sensed data-source selecting,the remote sensing image processing,interpretation and validation etc.Conclusion: With different resolution remotely-sensing data at the study area,the area,the natural storage and the yield of P.notoginseng were calculated.For Maguan county,with SPOT5(5 m),the relative right rate of judgement,the relative precision of area and the relative precision of yield with statistics was 92.7%,94.4% and 78.2% separately,and with TM(30 m),the relative right rate of judgement,the relative precision of area was only 71.4% and 58.8%,though,for Qiubei county,with TM(30 m),the relative precision of area with statistics could reach 74.7%,which showed that choosing appropriate remotely-sensing data and processing methods for different area,the remote sensing technique is feasible for resource survey of cultivated medicinal plants such as P.notoginseng.