Automatic extraction of watershed characteristics using spatial analysis techniques with application to groundwater mapping

1995 ◽  
Vol 173 (1-4) ◽  
pp. 145-163 ◽  
Author(s):  
Christopher P. Benosky ◽  
Carolyn J. Merry
Author(s):  
Andrew Curtis ◽  
Michael Leitner

n the opening chapters, GIS was broken into four general components, one of which was the spatial analysis of data. This is probably the least utilized of all GIS functions outside of an academic environment. A point that is often missed when discussing GIS is that the technology often exceeds the capabilities of the user. This is especially true if the user has not received any academic training in spatial data and GIS use. In Chapter VI a more sophisticated overview will be presented of the latest spatial analysis techniques along with examples of their implementation. Although the number of “spatially” trained scientists continues to grow, there is still a gap between the number of available skilled GIS modelers and the community programs needing GIS analysis. This chapter is designed to provide a stopgap approach, using more simple spatial statistical approaches that can be applied to gain a reasonable first insight into a birth outcome surface.


2018 ◽  
Vol 39 (6) ◽  
pp. 1347-1377 ◽  
Author(s):  
Abdelaziz Elfadaly ◽  
Wael Attia ◽  
Mohamad Molaei Qelichi ◽  
Beniamino Murgante ◽  
Rosa Lasaponara

Author(s):  
Tony H. Grubesic ◽  
Jake R. Nelson

Spatial analysis refers to a process that relies upon both exploratory and confirmatory techniques to answer important questions and enhance decision making with spatial data. This includes approaches to identify patterns and processes, detect outliers and anomalies, test hypotheses and theories, and generate spatial data and knowledge. Data qualify as “spatial” when their location is known and it has the potential to impact the outcome of an analysis. Most often, this space is tied to the geographic domain and concerns the Earth’s surface or subsurface. However, spatial data also exist within different scales and contexts, including nano- and picoscale processes in cellular electrophysiology and subatomic physics, among many others. When locational information is given about a particular piece of data, researchers in the field of spatial analysis can use that data to calculate statistical and mathematical relationships regarding time and space. If the data do not include locational information, such as a list of bicycle parts, spatial analysis would not be necessary. In fact, unless the data have some sort of locational information, spatial analysis is not possible. This article provides a foundation for exploring some of the most important works in spatial analysis. The General Overviews section provides readers with many of the most common and important techniques used in spatial analysis. Important Reference Resources are then discussed, followed by an overview of popular Journals that publish work pertaining to spatial analysis techniques and their applications. The two most common application areas for spatial analysis techniques, Gis and Remote Sensing, are then discussed, as are their respective software packages. The final section includes a more detailed overview of spatial analysis Techniques and their associated subdomains.


2016 ◽  
Vol 62 (4) ◽  
pp. 336-341
Author(s):  
Luciana Bertoldi Nucci ◽  
Patrick Theodore Souccar ◽  
Silvia Diez Castilho

Summary Introduction: Despite the growing number of studies with a characteristic element of spatial analysis, the application of the techniques is not always clear and its continuity in epidemiological studies requires careful evaluation. Objective: To verify the spread and use of those processes in national and international scientific papers. Method: An assessment was made of periodicals according to the impact index. Among 8,281 journals surveyed, four national and four international were selected, of which 1,274 articles were analyzed regarding the presence or absence of spatial analysis techniques. Results: Just over 10% of articles published in 2011 in high impact journals, both national and international, showed some element of geographical location. Conclusion: Although these percentages vary greatly from one journal to another, denoting different publication profiles, we consider this percentage as an indication that location variables have become an important factor in studies of health.


2018 ◽  
Vol 149 ◽  
pp. 02081
Author(s):  
RFIFI Mohamed ◽  
AIT BRAHIM Lahsen

The present study is consecrated to the probabilistic mapping of the landslide risk at the local scale of an area that belongs to Al Hoceima city in the western Rif of Morocco. The study focuses mainly on the spatial analysis of multi sources data by using an environment GIS (Geographic Information Systems), and the application of the bivariate probabilistic model to qualify the risk susceptibility. The employed methodology is based on three stages. First, the evaluation of landslide susceptibility (S) by the analysis model cited before. Second, the identification and the estimation of the potential consequences (C) for the existing issues. Finally, the landslide risk (R) is evaluated by combining the susceptibility and the potential consequences map. This study requires the use of spatial analysis techniques. It also refers to the risk maps scale, generally reduced and being inappropriate at the urban project area. The obtained risk map defines four risk intensities with a spatial resolution of two meters.


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