spatial analysis

History of soil geography in the context of scale
Categories of cartographic scale correspond to the selection of environmental soil predictors used to initially create historical soil maps. Paradigm shifts in soil mapping and classification can be best explained by not only their correlation to historical improvements in scientific understanding, but also by differences in purpose for mapping, and due to advancements in geographic technology. Although the hierarchy of phenomena scales observed in this study is generally known in pedology today, it also represents a new view on the evolution of soil science. Read More

29 June 2016
Comparison of spatial association approaches for landscape mapping of soil organic carbon stocks
A comparison of direct and indirect approaches for mapping SOC stocks from rule-based, multiple linear regression models applied at the landscape scale via spatial association. The final products for both strategies are high-resolution maps of SOC stocks (kg m‾²), covering an area of 122 km², with accompanying maps of estimated error. Although the indirect approach fit the spatial variation better and had a lower mean estimated error for the topsoil stock, the mean estimated error for the total SOC stock (topsoil + subsoil) was lower for the direct approach. The optimal approach would depend upon the intended use of the map. Read More

4 May 2015
CLORPT: Spatial Association in Soil Geography
Eugene W. Hilgard(Online Archive of California) From as early as 500 BCE, humans have recognized that some things vary together in space. This is essentially… Read More

24 April 2015
Types of Scale
When you read the phrases “large scale” or “small scale,” do you know what they mean? Sometimes “large scale” describes a large area, and sometimes… Read More

8 December 2014
Fundamentals of Spatial Prediction
In the process of creating a map, geographers often have to engage in the activity of spatial prediction. Although there are many tools we use… Read More

16 November 2014
Why Geography?
The scientific discipline of geography has taken on many important topics over the course of its history. From locating natural resources to understanding the intricacies… Read More

20 July 2014
Semantic calibration of digital terrain analysis scale
DTA has not been field tested to the extent that traditional field metrics of topography have been. Human assessment of topography synthesizes multiple parameters at multiple scales to characterize a landscape, based on field experience. In order to capture the analysis scale used by field scientists, this study introduces a method for calibrating the analysis scale of DTA to field assessments. Read More

9 July 2014
Relief Analysis Toolbox
The central purpose of this toolbox is to provide ArcGIS users a convenient way to calculate hillslope position from elevation grids. However, the Relief Analysis… Read More

16 June 2014