Spatial Data and GIS - Coordinate Reference Systems

Maps in R: R Maps Tutorial Using Ggplot

You can use R as a GIS. Learn how to create a map in R using ggplot in this R maps tutorial.

last updated: 10 Jan 2018

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

In this lesson you break down the steps required to create a custom legend for spatial data in R. You learn about 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: 10 Jan 2018

GIS in R: How to Reproject Vector Data in Different Coordinate Reference Systems (crs) in R

In this lesson you learn how to reproject a vector dataset using the spTransform() function in R.

last updated: 10 Jan 2018

GIS in R: Understand EPSG, WKT and other CRS definition styles

This lesson discusses ways that coordinate reference system data are stored including proj4, well known text (wkt) and EPSG codes.

last updated: 10 Jan 2018

GIS With R: Projected vs Geographic Coordinate Reference Systems

Geographic coordinate reference systems are often used to make maps of the world. Projected coordinate reference systems are use to optimize spatial analysis for a region. Learn about WGS84 and UTM Coordinate Reference Systems as used in R.

last updated: 10 Jan 2018

Coordinate Reference System and Spatial Projection

Coordinate reference systems are used to convert locations on the earth which is round, to a two dimensional (flat) map. Learn about the differences between coordinate reference systems.

last updated: 10 Jan 2018

GIS in R: shp, shx and dbf + prj - The Files That Make up a Shapefile

This lesson reviews the core files that are required to use a shapefile including: shp, shx and dbf. It also covers the .prj format which is used to define the coordinate reference system (CRS) of the data.

last updated: 10 Jan 2018

GIS in R: Intro to Vector Format Spatial Data - Points, Lines and Polygons

This lesson introduces what vector data are and how to open vector data stored in shapefile format in R.

last updated: 10 Jan 2018