Mashup is the dynamic combination of Web resources from two or more to create new applications. This is one of the important symbols of Web 2.0. The concept of aggregation existed in the late 1990s when Web services emerged, but it only became popular in 2005 because the widespread use of browser-side application programming interfaces (APIs) in 2005 greatly reduced the technical threshold required to integrate multiple website resources, making it easy to create aggregations.

Aggregation is a phenomenon that deserves the attention of the GIS industry. The most common functional requirement in GIS applications is to integrate multiple layers or datasets from multiple sources, so GIS has a fundamental need for aggregation. In recent years, the emergence of browser-side AI*I(such as the ArcGIS for Server APIs for JavaScript, Flex and Silver-light) has provided a simple and easy method to achieve the aggregation of geographical information, making GIS application development popular and popularizing GIS has been promoted to Neogeography applications. The vast majority of WebGIS applications today are aggregation. Convergence technology makes it easy for people to use the Web resources of others or other organizations, including data, maps and analytical functions, which is the foundation for the rapid development and application of Web services and cloud GIS.

Aggregation also faces multiple challenges. For example, integrating unstructured content like HTML documents remains difficult. However, hundreds of millions of web pages on the Internet contain a huge amount of geographical information, which has immeasurable application value. Extracting, locating and utilizing this type of information is 地理信息聚合 A valuable research area related to data mining.