In 2016, China will launch a national agricultural census once every 10 years

In 2016, China will conduct an once-in-a-decade national agricultural census, and more accurate and efficient remote sensing technology is expected to be applied to the census on a large scale.

China will conduct an once-in-a-decade national agricultural census in 2016

A drone, with two operators, can measure the entire crop area of 4 square kilometers in just two hours and clearly identify rice and cotton in the air.

When the reporter walked at the grass-roots level in Maoshuibang Village, Gaoqiao Town, Tongxiang City, Zhejiang Province in early December, the Zhejiang investigation team of the National Bureau of Statistics showed this set of agricultural remote sensing measuring devices.

The staff first delineated the plots that need remote sensing based on the medium-resolution remote sensing map data provided by the satellite, and then released the UAV to hover and lift off. In nearly two hours, the UAV automatically takes high-definition remote sensing images of the land to be monitored by satellite positioning, and the staff combines the images into high-resolution remote sensing images.

The person in charge of the Zhejiang investigation team of the National Bureau of Statistics further told our reporter that after obtaining the remote sensing data, we will take the cultivated land area as the frame, use the current image data of the characteristics of different growth stages of rice to extract the possible planting areas of rice on the computer, establish a spatial sampling framework, and carry out sampling survey by means of systematic automatic identification and interpretation, supplemented by field investigation and verification. Finally, the rice planting area is calculated by using the results of remote sensing interpretation and field investigation, and the overall accuracy should be controlled above 95%.

Even in areas with changeable terrain and different undulating angles such as hills and mountains, drones can carefully capture the actual area of cultivated land. According to the staff's explanation, because the difference in ground topography is very small relative to the flying altitude of the UAV of about 300 meters, the accurate planting area of crops can be obtained by remote sensing.

It is precisely because he has his eye on the great potential of agricultural remote sensing that Ma Jiantang, director of the National Bureau of Statistics, has made it clear that spatial information technology has great application advantages in the survey of agriculture, rural areas and farmers. and has arranged to launch a series of projects such as "operational application demonstration of national statistics based on high-resolution remote sensing" and "integrated service platform for rapid investigation of agricultural statistics based on autonomous satellites". This will greatly change the mode of production of China's agricultural statistics.

In the traditional agricultural statistics, sampling survey is carried out on agricultural growers, but this method has some problems, such as long investigation cycle, low investigation efficiency, easy to be disturbed and so on. Remote sensing technology can greatly improve efficiency and reduce interference. Through the cooperation of sky survey and geological survey, we can not only increase the accuracy of data, but also dynamically monitor the growth of crops and put forward accurate prediction of agricultural production situation in time. If there are sudden droughts, floods and other disasters, the UAV will be able to timely, accurately and effectively monitor and forecast the disaster situation and impact.

Grain output is an important data for the grass-roots level. Because on the one hand, grain production and acreage data are directly linked to food subsidies, on the other hand, they are directly linked to some performance assessments. The shift from human investigation to remote sensing monitoring is also expected to reduce the possibility of data intervention by all parties.

The head of the Zhejiang investigation team said that Zhejiang Province produced remote sensing data of 12 major grain-producing counties "with satellite images and field measurements" for the first time in the country. The sown area of crops measured by satellite remote sensing technology can accurately reflect the actual level of monitoring cities and counties.

In 2016, China will conduct an once-in-a-decade national agricultural census, and more accurate and efficient remote sensing technology is expected to be applied to the census on a large scale.

The relevant person in charge of the Rural Department of the National Bureau of Statistics once told the media that the National Bureau of Statistics has joined hands with Beijing normal University and Xinxing Jihua Group to create a "comprehensive service platform for rapid investigation of agricultural statistics based on independent satellites." make full use of independent satellite remote sensing and Beidou navigation technology to transform and upgrade the existing agricultural investigation system. The agricultural yield investigation vehicle is developed, which integrates UAV, handheld tablet computer, agricultural parameter collector and other measuring terminals, so as to realize the revolutionary change in the investigation methods and means of agricultural statistics, and improve the ability of agricultural statistical investigation and data quality in an all-round way.

The official said that at present, the National Bureau of Statistics has completed the transformation and integration of one provincial survey vehicle and two county-level survey vehicles on the "comprehensive service platform for rapid investigation of agricultural statistics based on independent satellites," and the new system will be implemented nationwide on a pilot basis in the future.