Spatial Data and GIS - Vector Data

Maps in R: R Maps Tutorial

Maps in R convert spatial objects into a cohesive spatial projection. Learn how to to make custom maps with ggplot or GIS in this R maps tutorial.

last updated: 23 Nov 2017

Extract Raster Values Using Vector Boundaries in R

This lesson reviews how to extract pixels from a raster dataset using a vector boundary. We can use the extracted pixels to calculate mean and max tree height for a study area (in this case a field site where we measured tree heights on the ground. Finally we will compare tree heights derived from lidar data compared to tree height measured by humans on the ground.

last updated: 19 Oct 2017

GIS in R: Plot Spatial Data and Create Custom Legends in R

In this lesson we break down the steps required to create a custom legend for spatial data in R. We discuss creating unique symbols per category, customizing colors and placing your legend outside of the plot using the xpd argument combined with x,y placement and margin settings.

last updated: 19 Oct 2017

GIS With R: Using the Right UTM Projection

Coordinate reference systems are key to analyzing GIS data in R. Learn how to use GIS with R and use the right UTM projection to improve the accuracy of spatial projections.

last updated: 23 Nov 2017