Download Promote the application of spatial information technology in crop production survey

Statistics Reformation:
Promote the application of
spatial information technology
in crop production survey
Wang Minghua Wei Ge
NBS P.R.China
Vientiane, Lao PDR, 18-21 February 2014
Content
• Area Frame Survey
• Remote sensing of crop area
measurement and yield trend estimation
• Effect and prospects of spatial
information technology application
3 “S”
• Spatial information technology
includes three aspects, namely,
remote Sensing, GIS and GPS,
often called the “3S”technology
Sky, Ground and Person
The core of the space information
technology is information
integration from the “sky, ground
and person”, is a system of
collection, management and
analysis with spatial
characteristics, complete
information, accurate positioning.
“863” Project
• IN 2006, National Bureau of
Statistics launched a national
• “863” Project :
National Statistical Sensing
Operational System Key Technology
Research and Application
Application Content
• Census of Population
• Census of Economics
• Investment Projects Survey
• Crop Production Survey
Crop Production Survey
Area Frame Survey
Remote sensing of crop area
measurement and yield trend
estimation
Area Frame Survey
Area Frame Survey
• Sampling design
• Data collection
• Quality control and assessment
• Estimation
Sampling design
• Preparation of the area sampling frame
• Formation of the sampling unit
• Random sample selection by given
probability
Preparation of the area sampling
frame
• The second national agricultural
census data(2006)
• The second national land survey
results(2013)
• Remote sensing images (time,
resolution)
The second national
agricultural census data(2006)
Resolution remote sensing images
Formation of the sampling unit
• Elementary area sampling unit(ESU)
Size : 2 or 5 hectares
• Primary sampling unit(PSU)
–administrative villages
–spatial information grid
Setting PSU and ESU
Random sample selection by given
probability
• PPS (the probability proportional to
cultivated land scale)
PSU sample
• SRS(simple random sampling) within
PSU sample
ESU sample
PSU(county as population)
PPS
PSU sample(administrative villages)
ESU(Within PSU sample)
SRS
ESU samples
Data collection
• One time survey
Position, Basic information, etc.
• Season survey
Target crop sown area and yield per sown area
Field survey with GPS+PDA
Data quality control and assessment
• UAV(Unmanned Aerial Vehicle)
• Timely survey control and supervision
• Digital photos
• Sampling error assessment
UAV(Unmanned Aerial Vehicle)
Recheck
Timely survey control and supervision with GPS and GSM
Digital photos
Sampling error assessment
Jackknife method
After the actual test, the CV of target crop sown are less than 5%
Remote sensing of crop
area measurement and
yield trend estimation
Remote sensing crop area
measurement
Crop yield monitoring and remote
sensing
Effect and prospects
of spatial information
technology application
Effect and prospects of spatial
information technology application
• Reduces the cost
• Improve sampling efficiency
• Enhance the comprehensive ability of data
collection
• Improve the quality
Thank you!