Abstract
With the fast growth of internet-based sharing mechanism and OpenGIS technology, users nowadays enjoy the luxury to quickly locate and access a variety of geospatial data for the tasks at hands. While this sharing innovation tremendously expand the possibility of application and reduce the development cost, users nevertheless have to deal with all kinds of “differences” implicitly hidden behind the acquired georesources. We argue the next generation of GIS-based environment, regardless internet-based or not, must have built-in knowledge to automatically and correctly assess the fitness of data use and present the analyzed results to users in an intuitive and meaningful way. The VISA approach proposed in this paper refer to four different types of visual aids that can be respectively used for addressing analyzed results, namely, virtual layer, informative window, symbol transformation and augmented TOC. The VISA-enabled interface works in an automatic-aware fashion, where the standardized metadata serve as the known facts about the selected geospatial resources, algorithms for analyzing the differences of temporality and quality of the geospatial resources were designed and the transformation of analyzed results into visual aids were automatically executed. It successfully presents a new way for bridging the communication gaps between systems and users. GIS has been long seen as a powerful integration tool, but its achievements would be highly restricted if it fails to provide a friendly and correct working platform.
Highlights
With the fast growth of internet-based sharing mechanism and OpenGIS technology, users nowadays enjoy the luxury to quickly locate and access a variety of geospatial data for the tasks at hands
To meet the illustration demands of different types of analysis information, we propose the VISA approach, which is designed to intelligently consume the data quality analysis results and transform to meaningful visual aids with four major strategies, namely, virtual layer, informative window, symbol transformation and augmented Table of Content (TOC)
The VISA-enabled interface is intended to work in an automatic-aware fashion, where the standardized metadata serve as the known facts about the selected geospatial resources, algorithms for analyzing the differences of temporality and quality of the geospatial resources were designed and the transformation of analyzed results into visual aids were automatically executed
Summary
With the fast growth of internet-based sharing mechanism and OpenGIS technology, users nowadays enjoy the luxury to quickly locate and access a variety of geospatial data for the tasks at hands. The VISA-enabled interface is intended to work in an automatic-aware fashion, where the standardized metadata serve as the known facts about the selected geospatial resources, algorithms for analyzing the differences of temporality and quality of the geospatial resources were designed and the transformation of analyzed results into visual aids were automatically executed. Except for datasets that come with cartographic design already, users normally can freely select map symbols to fit their visual purposes Despite of this convenience, this design fails to provide an effective mechanism to display of quality information and a new approach is needed. Symbol transformation presents quality information by dynamically changing the map symbol design of selected features according to the selected quantitative quality measure These four components are designed in an integrated fashion to simultaneously provide different types of visual aids for users’ reference. TOC Theme Theme Theme applicable scenario of the VISA approach, so that more interface design strategies can be formalized
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