Background: Geocoding is highly prone to error for various reasons. This paper examines the geographical inconsistencies associated with geocoding errors seen when using two freely available geocoding tools, Google Sheets and ggmap. Methods: Two hundred restaurants, all recipients of California’s Center of Excellence award, were selected for the analysis. The geocoded addresses were plotted on ...

We calculated the usable distance of the main roads in the coastal area of Iwate prefecture following the 2011 Tohoku Earthquake. Calculations were based on a vehicle tracking map built from G-BOOK telematics data using QGIS, an open source geographic information system. The main findings are as follows. (1) The change in the accumulative usable road distance ratio during the research period di...

The elliptic algebra Aq,p(ŝl(N)c) at the critical level c = −N has an extended center containing trace-like operators t(z). Families of Poisson structures, defining q-deformations of the WN algebra, are constructed. The operators t(z) also close an exchange algebra when (−p1/2)NM = q−c−N for M ∈ Z. It becomes Abelian when in addition p = qNh where h is a non-zero integer. The Poisson structures...

More and more historical data are available on the web. In France, old cadastral maps are regularly published by the “départements”. Such material is relevant to various applications (onthe-field search of specific objects such as old boundary stakes, historical studies of demography, human activities, land cover...). The GeF laboratory is working on the development of a complete methodological...

The use of Pseudoinvariant Areas (PIA) makes it possible to carry out a reasonably robust and automatic radiometric correction for long time series of remote sensing imagery, as shown in previous studies for large data sets of Landsat MSS, TM, and ETM+ imagery. In addition, they can be employed to obtain more coherence among remote sensing data from different sensors. The present work validates...

Numerous 3-D GIS are being developed today that are both commercially and freely available. A multicity web-based 3-D GIS (named as GLC3d) using open source and freely available software/packages exclusively has been developed. This paper presents the architecture, design, and overview of GLC3d. Open source tools and software’s QGIS, Cesium, and MySQL are employed to develop this application. Q...

This paper introduces GisedTrend, a plugin of the QGIS geographical information system that implements the Grain Sized Trend Analysis (GSTA) method. It is advantageous to incorporate the GSTA method in a GIS since it can directly access: (i) environmental information such as bathymetry, coastline, etc., (ii) spatial analysis tools available in such working environments, (iii) input/output data ...