Preliminary research topic: give the latitude and longitude range (rectangular or circular) quickly from large quantities of latitude and longitude in order to remove information points

Preliminary research topic: give the latitude and longitude range (rectangular or circular) quickly from the large quantities of latitude and longitude in batches to remove information points.

The method currently taken from the database can be resolved, but the amount of information is limited. A lot of data appears to be slower.

If the generation of text files based on the index to find should be able to solve, the most important is the data segmentation method and fast indexing method, you can refer to search engine segmentation methods and search methods.

Example reference:

Http://union.mapbar.com/apidoc/vip/ad_layers.html

Http://union.mapbar.com/apidoc/vip/ad_check_edge.html

Attention should be paid to when handling:

1, to ensure that users add changes at any time to delete data, processed data should be immediately reflected in the segmentation of the data file, and can not be manually processed afterwards.

2, to provide interface, requirements can be instantaneous fast, otherwise not practical.

3, mainly in order to solve the use of labeling method, the data level is not clear, look not clear, too much data, drag the map slower.