The Research Of Water And Soil Conservation Information Extraction By Remote Sensing Technology Of Uav In Point-Shaped Production And Construction Project

Low-altitude uav remote sensing technology is the new technology and new development direction of soil and water conservation management and development.How to obtain land use,vegetation and other information related to soil and water conservation management through high precision is one of the key problems to be solved in applying uav technology to soil and water conservation management.Based on this,this paper discusses the uav remote sensing technology in point-shaped production and construction of soil and water conservation projects responsibility range,vegetation and disturbed landform information fast extraction and development of applied research.It has great scientific significance and practical value to apply advanced uav technology to water and soil conservation construction.Remote sensing technology is often used for the comprehensive treatment of small watershed in water and soil conservation,while the remote sensing image interpretation accuracy is not high in small-scale production construction projects.Based on the research object of the Jiulong activity park in Heyang of Weinan,the image analysis is based on the uav aerial orthophotograph.With the support of ARCGIS and ENVI software,vector processing was carried out for the previously undefined responsibility range,disturbed geomorphology and vegetation cover in water and soil conservation.The evolution results of disturbed landform and vegetation cover in remote sensing image observation in the experimental area are systematically analyzed,and the disturbed landform compliance discrimination and vegetation restoration effects of production and construction projects are evaluated.The research results are as follows:(1)The flight implementation includes 70 m,150m,250 m high-altitude flight zones,using the quickly image splice function of Agisoft photoscan software,and automatically generate high resolution orthophotograph.in the experimental area,The image accuracy is tested by using measured data and image control point comparison.The results of image detection show that the accuracy of image overlap and plane resolution increases with the decrease of flight height at low altitude.the horizontal resolution of 70 m flight zones is as high as 0.2m.(2)The extraction of vegetation area was mainly achieved through the non-supervised classification function of ENVI,clump and classification results were adopted to enhance the accuracy of vegetation recognition.With the help of human-computer interaction,a higher level of classification is achieved,and the error of vegetation area extraction is 3.6%.The vegetation by interactive recognition can avoid the different spectrum phenomenon and improve the extraction accuracy and obtain reliable data results.(3)With the help of ARCGIS software and human-computer interaction,1 is responsibility range of the raster to vector maps,2 is to use cutting vector disturbance landform boundary files for test area,3 is completed green spots finishing work.(4)Based on the above research results,through GIS spatial superposition analysis,the disturbed landform compliance of the target test area can be verified by using the vector graph of responsibility range and disturbance range,the disturbed land regulation rate is calculated to be 100%.Comparative analysis of greening design spot and visual identification of vegetation map spot,high overlap ratio,vegetation map can reflect the effect of vegetation restoration of the good,most of the vegetation map spot effect basic meet the design requirements.In addition,the vegetation recovery rate was 96.51%.