Geographic Visual Query Languages and Ambiguities Treatment

نویسنده

  • Patrizia Grifoni
چکیده

The main issues of spatial databases and Geographic Information System (GIS), concern the representation, the management and the manipulation of a large and complex number of spatial objects and spatial relationships. In these systems many concepts are spatial and, therefore they are intrinsically related with a visual representation, which makes also easier to formulate queries by non-expert users. The main problems in visual query languages for spatial databases concern imprecision, spatial integrity and ambiguities in query formulation. Our concern in this chapter is with the ambiguity of visual geographical queries. In particular, a review of existing visual query languages for spatial databases and their classification on the grounds of the methodology adopted to resolve the ambiguity problem are provided. DOI: 10.4018/978-1-4666-2038-4.ch052

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

5 Syntactical and Semantical Correctness of Pictorial Queries for Gis

One of the main topics in geographical information systems (GIS) research concerns the definition of high level visual query languages (Chrisman, 2002; Laurini & Thompson, 1992). This arises from the need to provide the user with a visual interactive tool for data manipulation and retrieval that is independent of the data’s physical organization. The use of standard query languages for spatial ...

متن کامل

A High Level Visual Language for Spatial Data Management

In this paper, we present a visual language dedicated to spatial data called Lvis. This language has been defined as an extension of the Cigales visual language based on the Query-By-Example principle. The language is based on predefined icons modelling spatial objects and operators which are used to build a visual query. The visual query is then translated into the host language of any Geograp...

متن کامل

Syntactical and Semantical Correctness of Pictorial Queries for GIS

One of the main topics in geographical information systems (GIS) research concerns the definition of high level visual query languages (Chrisman, 2002; Laurini & Thompson, 1992). This arises from the need to provide the user with a visual interactive tool for data manipulation and retrieval that is independent of the data’s physical organization. The use of standard query languages for spatial ...

متن کامل

GeoPQL: A Geographical Pictorial Query Language That Resolves Ambiguities in Query Interpretation

The main problem of visual query languages for geographical data concerns the query’s ambiguity. Ambiguity derives from the fact that a query can lead to multiple interpretations for both the system and user. In fact a query can have different visual representations, and these can themselves have different interpretations. Among the reasons leading to these ambiguities, one appears to be fundam...

متن کامل

Visual Spatial Query Languages: A Semantics Using Description Logic

We present a first treatment dealing with the semantics of visual spatial query languages for geographic information systems using a suitable description logic. This decidable space logic is described and its usefulness for geographic information systems is exemplified. The logic supports the specification of a semantics, reasoning about query subsumption and about applying default knowledge.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015