Introduction  With respect to the flat topography wind farm, wind speed and wind direction present significant regional difference in complex terrain region, which bring great challenges to the selection of generator, wind turbine layout, production assessment. To solve these problems that may occur during micro-sitting in complex terrain region such as wind measurement mast, contour, restricted factors.

  Method  This paper detailedly analysed and discussed these problems based on the collected wind data, associated with the author′s work experience, and illustrated the significant influence of restricted factors on the generation of wind farm.

  Result  Confirming the accurate location of the wind measurement mast, marking the restricted areas at the topographic map via field investigation. Checking the accuracy of the contour value by creating elevation grid from 3D vector data, making contrast analysis with the value of the contour lines.

  Conclusion  Practice has proved that accurate site of the mast and high-quality wind data play an important role during wind energy resource assessment, the identification of restricted areas can shorten the time required to develop a layout plan and improve the work efficiency. With accurate topographic map, wind resources in the wind farm and surrounding areas can be accurately simulated, which can provide quality assessment results for investors.