由於網際網路迅速發展以及Web網路服務的日漸普及，地理資料的取得遠較以往便利。尤其在開放式（Open）地理資訊系統之概念被提出後，異質地理資料庫之間資料共享與互操作性的課題益顯重要。ISO/TC211以及OGC（Open Geospatial Consortium）因此制訂了一系列的標準，期許建構開放的地理共享機制，以加強資料的流通。但當使用者可由分散環境取得大量圖徵資料後，卻常常由於各類資料之應用綱要設計不同，造成使用者無法正確辨識取得之圖徵，也因此影響資料之互操作性。透過記錄圖徵本身即具有之識別資訊，可簡化開放式環境中圖徵之辨識及結合應用，以串連同一圖徵原來分散於不同來源資料。其中較大的挑戰是不同來源資料之識別資訊往往各具特色，而非參考單一體系之識別架構，因此常會產生誤用或辨識錯誤的情形。另一方面，格式不一的包裝方式也往往造成解讀程式發展的困擾。且透過網路可取得越來越多的地理資料，勢必需要一有效可解讀位於不同來源中特定圖徵資料之機制。因此本研究提出符合現有流通環境標準之識別碼基本架構（Identifier Framework），並規劃相關之執行策略，期望可透過此識別碼基本架構，使流通之地理資料均能攜帶具有溝通能力之識別碼資訊，達成可正確識別之目標。本研究進一步提出圖徵資料庫之概念，使特定圖徵具備完整之識別資訊，以作為不同來源資料有效串連之橋樑。即使資料僅具有該特定領域之識別資訊，亦可透過圖徵資料庫取得額外之識別資訊，並藉由取得之額外識別資訊廣泛關連不同領域之資料，以達成於網際網路環境中有效的資料關連，及分散式GIS環境中更廣層面之資料整合應用的目標。

With the rapid development of internet and wide popularity of web service, the acquisition of geographic data has become much convenient than before. The issues of data sharing and data interoperability in heterogeneous distributed GIS environment therefore have received high attention in recent years, particularly after the concept of the open geographic data was promulgated.

Both the ISO/TC211 and OGC（Open Geospatial Consortium）have established a series of standards, wishing to construct an open framework for better data communication in internet. While users may easily acquire a large amount of geographic feature from distributed resources, its correct interpretation remains to be a challenge due to the various design of domain-dependent application schema. Correct feature identification information can simplify the interpretation of geographic feature in open environment. However, some challenges still need to be resolved. On one hand, data obtained from distributed resource often has its unique way to record identification information, the complexity of different identifier systems, however, often leads to misuse or wrong interpretation during applications. On the other hand, the different encoding strategies of identification information also impede the development of standardized data parsing modules. With more and more geographic data available in internet, it is surely advantageous to be able to effectively locate information about an individual feature that stored in different georesource.

We proposed an “identifier framework” complying with current international GIS standards in this research. With such a common and standardized structure of identification information, all distributed feature will be equipped with communication capability. By further establishing a feature database that collects all related identifiers for a particular feature, it can serve as a powerful medium to effectively connect information about an individual feature from different resource. Even with only one individual domain-dependent identifier, users can easily acquire additional identifiers by interacting with feature database on the basis of common identifier, and extend their search to other distributed resources via the newly acquired identifier. This can tremendously expand the ability to search related information in internet environment and improve the data interoperability in distributed GIS applications.

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