Selecting the monitoring area of the barchan dune evolution in the hinterland of Taklimakan Desert, we get high temporal resolution three-dimensional coordinate data of the dune surface with a precision of millimeter using the RTK working mode of Huace X90 GNSS receiver. With the help of the geological mapping software CASS 9.0 and the geographic data analysis software ArcGIS 10.0, we try to perform three-dimensional coordinate data processing and extract the data of attribute information of the barchan dune, such as slope length, slope angle, height, width, ridge length, distance between two wings and included angle, volume, dune surface area and projection area, slope and aspect, etc. Experiencing a multi-period overlay analysis of monitoring data, we are able to calculate erosion/acumulation, movement speed and direction, and other information data of the sand dune evolution. The results show that the typical barchan dunes are in the state of accumulation between the first and the second monitoring period, the accumulation is 51.4 m3, the moving speed is about 16.0 m·a-1 and the direction is 226°45', the movement direction is consistent with the main wind direction (NE) in this area. Attributive parameter extraction of the barchan dune based on CASS and ArcGIS is an effective way to quantitatively study the morphological evolution process and location migration dynamics of the dune, and to clarify the numerical relationships among the attribute parameters during the sand dune evolution process.
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