### PostgreSQL/PostGIS II: Geometry Types and Coordinate Systems

October 25, 2016
Post source code

An introduction to the spatial database management system PostGIS, with a focus on using R as an interface to PostGIS. In this post I provide an overview of the different spatial data types and the use of coordinate systems in PostGIS.

### RStudio in the Cloud II: Syncing Code & Data with AWS

October 20, 2016
Post source code

Tutorial on transferring and syncing data between an Amazon Web Services (AWS) EC2 instance and your local machine, with GitHub and S3.

### PostgreSQL/PostGIS I: Getting Set Up

September 19, 2016
Post source code

An introduction to the spatial database management system PostGIS, with a focus on using R as an interface to PostGIS.

### RStudio in the Cloud I: Amazon Web Services

September 13, 2016
Post source code

Detailed instructions for how to quickly get a cloud-based, tidyverse-ready instance of RStudio Server running on an Amazon Web Services EC2 instance.

### ILP Solver Comparison Part II: SCIP

June 15, 2016
Post source code

Comparing the performance of open-source integer linear programming solvers. In this post, I look at the SCIP solver, which doesn't have an R interface.

### Open-source ILP Solver Performance Comparison

June 4, 2016
Post source code

Comparing the performance of open-source integer linear programming solvers. The focus is on finding an open-source alternative to Gurobi for conservation prioritization and proteced area design.

### Field Guide to ILP Solvers in R for Conservation Prioritization

May 19, 2016
Post source code

A field guide to all the open-source integer linear programming solvers that have R packages. The focus is on finding an open-source alternative to Gurobi for conservation prioritization and proteced area design.

### Intro to Docker: A Docker Image for Linear Programming

May 8, 2016
Post source code

Introduction to Docker containers. In this post I build a Docker container for linear programming in R.

### Integer Programming with Gurobi for Reserve Design

April 25, 2016
Post source code

Solving Marxan-like systematic conservation planning problems using Integer Linear Programming and Ineger Quadratic Programming techniques with the R interface to the Gurobi Optimizer.

### Systematic Reserve Design: Emulating Marxan in R

March 21, 2016
Post source code

Marxan is the most widely used software for systematic reserve design. In this post, I dealve into the details of Marxan and emulate it in R.

### Noah's Big Year Route & Spatial Clustering in R

February 18, 2016
Post source code

Noah Strycker just broke the global big year record, seeing over 6,000 bird species in 2015. I map his route with ggplot and a couple spatial clustering algorithms.

### Mapping the Longest Commericial Flights in R

February 1, 2016
Post source code

Mapping the longest regularly scheduled commercial flights in the world using R and ggplot2. Includes a discussion of the challenges associated with maps for which the central meridian is not at Greenich.

### Fishnets and Honeycomb: Square vs. Hexagonal Spatial Grids

January 14, 2016
Post source code

Considering the benefits of hexagonal grids relative to square grids for spatial sampling and analysis, and generating hexagonal grids in R.

### Visualizing Noah Strycker's Birding Big Year

January 2, 2016
Post source code

Noah Strycker just broke the global big year record, seeing over 6,000 bird species in 2015. I use ggplot to visualize his sightings over the course of the year.

### Scale and numerical precision in RGEOS

December 20, 2015
Post source code

Exploring the unexpected results that can arise in GEOS topology operations from problems with numerical precision or registration in coordinates.

### Estimating pi with GIS and Monte Carlo methods in R

December 9, 2015
Post source code

Using Monte Carlo methods, randomly placed spatial objects, and topological operations in R to estimate pi.

### Markdown Cheatsheet

December 1, 2015
Post source code

A cheatsheet and showcase of Markdown syntax meant to show how different elements will be rendered.