Ajax GIS application for GNSS availability simulation

Lee, Yang Won; Suh, Yong Cheol; Shibasaki, Ryosuke

doi:10.1007/bf02885901

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…Actually, the principle of AJAX technology is that adding a middleware between the client and the server, the middleware is an AJAX engine which be written in JavaScript applications. AJAX engine transfer some work of server to client [9]. It is not directly to send requests to server but itself will do some simple operations, such as data verification and data processing until pulling new data from the server.…”

Section: Ajaxmentioning

confidence: 99%

Research on Information Retrieval System of Typhoon Based on ArcGIS Server

Chen

Wang

Xiang

et al. 2014

AMM

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At the information age, the traditional GIS has already can't satisfy people's demand for real-time access to geographic information, such as typhoon weather phenomenon change at any time. Based on ArcGIS Server platform and Java technology, the typhoon information query system of B/S architecture has been designed. The system can complete the space mapping service release and attribute information query, spatial orientation, motion path of dynamic display, for the typhoon weather forecasters and the public provide real-time access information query platform. At the same time, aiming at common bottlenecks in Web GIS application, the paper puts forward the optimization of the data and the establishment of cache. Experiments show that these two methods in reading speed and response speed figure have improved significantly.

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Section: Ajaxmentioning

confidence: 99%

Research on Information Retrieval System of Typhoon Based on ArcGIS Server

Chen

Wang

Xiang

et al. 2014

AMM

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“…Currently, evaluations of the urban canyon effect are usually conducted directly by measurement with a receiver, which is time-consuming and requires a site visit, and this might not be feasible. Another method is using 3D GIS or 3D city models to simulate the availability of GNSS [4][5][6]. However, such data is not widely available and costly to create.…”

Section: Introductionmentioning

confidence: 99%

Simulation of GNSS Availability in Urban Environments Using a Panoramic Image Dataset

Tongleamnak

Nagai

2017

International Journal of Navigation and Observation

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Performance of Global Navigation Satellite System (GNSS) positioning in urban environments is hindered by poor satellite availability because there are many man-made and natural objects in urban environments that obstruct satellite signals. To evaluate the availability of GNSS in cities, this paper presents a software simulation of GNSS availability in urban areas using a panoramic image dataset from Google Street View. Photogrammetric image processing techniques are applied to reconstruct fisheye sky view images and detect signal obstacles. Two comparisons of the results from the simulation and real world observation in Bangkok and Tokyo are also presented and discussed for accuracy assessment.

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