Abstract:

 Objective  To develop and apply the Oncomelania snaillnformation Management Sys-
tem based on GIS.  Methods   With calculating the path by some GPS points and snail information
database, the visualized snail information profiles were drawn automatically. Results  The Posi-
tioning Oncomelania snail Information Management System has been developed and running in
Changsha, and it made snail information standardized, visualized and digital, not only supplied
many precise queries, but also formed a link of snailinformation based on years. Conclusions   The
positioning Oncomelania snail Information Management System based on GIS raises the efficiency of
information management and the veracity of information, it makes the snail information more inte-
grated and systemic, which provides the basis for developing the On.comelania snail Information
Management System of Hunan Province.

Key words: Oncomelania snail, Path calculation, GIS, GPS

摘要：

目的利用地理信息系统(GIS)、全球定位系统(GPS)技术开发钉螺孳生区螺情实查信息系统。方法通过开发螺情轨迹计算软件，利用有限的GPS实测坐标信息，自动计算和生成查螺轨迹，并结合螺情数据库，在GIS系统上形成直观的实查螺情信息分布图。结果建立了基于GIS技术的网格定点式螺情信息系统，并成功地在长沙市的4个区进行了试用，实现了人工查螺信息的标准化、直观化和数字化，提供了多种准确的定位螺情信息的查询方法。通过对历年的螺情信息处理，形成了以时间为主轴的螺情信息链，为政府部门制定查灭螺决策提供了可靠的信息模型。结论基于GIS技术的网格定点式螺情信息系统大大提高了人工查螺信息处理的效率和螺情的准确度，使螺情信息更加完整和系统化，为建立湖南省的螺情信息系统奠定了基础。

关键词: 钉螺；查螺轨迹；地理信患系统；全球定位系统