基于规则的OpenStreetMap数据模型转换

周边区域地理信息的获取是我国地缘环境研究中的一个难题,志愿者地理信息(volunteered geographic information,VGI)的兴起为解决该难题提供了一个可行的方法。在目前一系列的VGI项目中,OpenStreetMap(OSM)是比较领先的应用,但OSM数据模型不同于我国周边应用的专业矢量数据模型,因此,利用OSM数据时首先需要对其进行模型转换。有鉴于此,本文提出了一种基于规则的OSM数据到专业应用矢量数据模型转换方法。该方法首先利用OSM定义的几何类型与地物属性作为分类依据,建立了模型转换基本规则库;对于志愿者根据自己的理解自行标注未包含在基本规则库中的目标采用人机交互方式进行模型转换,并在此过程中不断完善规则库,利用越南与巴基斯坦数据进行实验,最终形成了包括2 344条转换规则的模型转换规则库,为OSM数据模型到专业应用矢量数据模型的转换提供了一条可行途径。

Model Transformation of OpenStreetMap Based on Rules

Spatial data acquisition is a bottleneck for borderland researching.In recent years, Volunteered Geographic Information (VGI) has been proven to be a very successful means of acquiring timely and detailed global spatial data.OpenStreetMap (OSM) has been known as the most successful VGI resource.But OSM data model is far different from the traditional geographic information mod-el.Thus the OSM data needs to be converted to the scientist customized data model at first.Therefore, a rule_based transformation method is presented after analysing OSM data characteristics in this paper.In this method, a basic transformation rule base is estab-lished using geometry type and thematic attribute defined by OSM Features firstly.Then, the left unusual objects tagged by the volun-teers according to their understanding are converted by human-computer interaction and the responding transformation rules are re-membered into the rule base.A transformation rule base with 2344 rules was established in the experiment.OSM data of Vietnam, Pa-kistan is used to test and verify the the effectiveness of the method.Experiment proved that the method presented in this paper provide a solution for OSM data model converting to traditional authoritative data model.