active shape model .. there is an example to understand .. this is a source from the internet

从数据库中读取经纬度数据，然后修改Shape文件，在图层中添加点Feature数据，适合需要绕过ESRI产品，直接修改Shape文件的场合。代码是自己写的，不是网络拷贝。-Read latitude and longitude data from the database, and then modify the Shape file, add the points in the Feature data layer, for to go to ESRI products, Shape file

This sample custom task allows a Web ADF user to select features by clicking or drawing a shape on the map. The user chooses a layer to select from, along with the type of tool, and then clicks on the map to select. Available tools are: point, rectan