- General Purpose Programming with Scripting Languages
- Graphviz
- LaTeX Tips and Tricks
- PostGIS: Spatially enabled Relational Database Sytem
- PROJ: forward and reverse geographic projections
- GDAL and OGR: geodata conversion and re-projection tools
- R: advanced statistical package
- Access Data Stored in a Postgresql Database
- Additive Time Series Decomposition in R: Soil Moisture and Temperature Data
- Aggregating SSURGO Data in R
- Cluster Analysis 1: finding groups in a randomly generated 2-dimensional dataset
- Color Functions
- Comparison of Slope and Intercept Terms for Multi-Level Model
- Comparison of Slope and Intercept Terms for Multi-Level Model II: Using Contrasts
- Computing Statistics from Poorly Formatted Data (plyr and reshape packages for R)
- Creating a Custom Panel Function (R - Lattice Graphics)
- Customized Scatterplot Ideas
- Exploration of Multivariate Data
- Interactive 3D plots with the rgl package
- Making Soil Property vs. Depth Plots
- Plotting XRD (X-Ray Diffraction) Data
- Summarizing Grouped Data in R
- Using lm() and predict() to apply a standard curve to Analytical Data
- Visualization of Grouped Data with Lattice Graphics (in R)
- Working with Spatial Data
- Comparison of PSA Results: Pipette vs. Laser Granulometer
- GRASS GIS: raster, vector, and imagery analysis
- Generic Mapping Tools: high quality map production
- TAPESG: Grid-based Terrain Analysis Software
