Design a web portal for visualizing and exploring service quality of global OGC Web Map Services

Selecting satisfactory web service instances from massive providers is significant and also challenging, since multiple factors, snch as end users' qnality requirements and preferences, need to be considered in the selecting process. To partially address this issue, this paper introduces a sophisticated neb portal, which is designed for visualizing and exploring the service qnality of global OGC Web Map Services (WMS). The web portal allows end users to query and filter services through Interaction. To intuitively express and convey the information of retrieved services to nsers. multiple visualization methods are Integrated, Including lists, tables, charts and maps. Visualization controls snch as Map World, Dojo. and Highcharts are utilized to enhance nser interactivity and provide enriched expression of service quality. The monitoring results of 584 OGC services distributed globally are used as the data source, which Is coDected from 17 global monitoring sites. The monitored quality metric from both service level and layer level are recorded and displayed, including FGDC score, response time, availability, etc. The monitored data can be used to investigate the spaQotemporal characteristic of the service quality. User experiments prove that, by using the web portal, they can judge and distinguish services according to the quality intuitively. Challenges and future works are discussed to enlighten potential future research on the qnality of geographic information services (QoGIS), snch as usual evaluation.