Recently, in the special audit survey on the quality improvement of the six bank of Sanjiang in the central urban area, the Municipal Audit Bureau will organize the data analysis team with the city surveying and Mapping Institute to make full use of the natural resource elements and geographic data acquisition and processing technology mastered by the surveying and mapping work, providing technical support for the audit work of urban quality upgrading. Improve the effectiveness and level of audit supervision.
　　First, we should use general regulatory data to check illegal buildings. In order to investigate and understand the implementation of the planning and implementation of the six banks in Sanjiang, the overall planning of the city, the detailed planning data of regional control and the current situation of land use are compared, and the suspected illegal buildings are further verified by the planning, housing and other departments and the building owners. It covers an area of about 85402 square meters.
　　The two is using remote sensing image data to compare the enhancement effect. Taking the remote sensing image as the base, through the computer automatic processing and artificial assistance, the geographic elements covering map spots in the related annual images are extracted and the superposition comparison is carried out to analyze the green area, green rate, green coverage area, greening rate and green area before and after the upgrading and transformation of the park of Hao River Park, helm Park and Yanwu park. The change of road length and other data provides a basis for judging the quality improvement effect.
　　Three is the use of unmanned aerial photography technology to verify the status of the construction. Using the unmanned aerial vehicle (UAV) to carry out the current aerial photography of the related areas, combined with the requirements of the development and construction of the six bank of Sanjiang in 2015-2017 by the municipal government, 35 construction projects have been found to be slow or unstarted, and about 3623 square meters of construction waste accumulate on the bank, providing an effective clue for the further investigation and collection of evidence.