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In order to divide the cultivated land quality improvement area, Jiutai District in Changchun City was studied in this paper. Relying on the annual update and monitoring results of cultivated land quality in 2017 and using the improved natural potential index model, the dominant limiting type of each cultivated land unit in the study area was calculated and the extent of its dominant limitations were determined. Based on these results, cultivated land quality improvement area was determined to partition relied on the ArcGIS platform, and then some specific recommendations was made. The results showed that there were 14 dominant limiting types of cultivated land and 20 types of extent of dominant limitations combined with the dominant limiting type in Jiutai. Through the study of local conditions, the three periods of cultivated land quality improvement area of short-, medium- and long-term was divided which would provide reasonable scheduling for future land consolidation in Jiutai and reference for the improvement and construction of cultivated land quality.

As points of interest (POI)on the internet, exists widely incomplete addresses and inconsistent literal expressions, a fast standardization processing method of network POIs address information based on spatial constraints was proposed. Based on the model of the extensible address expression, first of all, address information of POI was segmented and extracted. Address elements are updated by means of matching with the address tree layer by layer. Then, by defining four types of positional relations, corresponding set are selected from standard POI library as candidate for enrichment and amendment of non-standard address. At last, the fast standardized processing of POI address information was achieved with the help of backtracking address elements with minimum granularity. Experiments in this paper proved that the standardization processing of an address can be realized by means of this method with higher accuracy in order to build the address database.