## Make Interactive Maps with Leaflet R - GIS in R

In this lesson we break down the steps to create a map in R using ggplot.

*last updated: 16 Nov 2017*

In this lesson we break down the steps to create a map in R using ggplot.

*last updated: 16 Nov 2017*

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*

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*last updated: 19 Oct 2017*

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*

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*

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

*last updated: 19 Oct 2017*

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

*last updated: 19 Oct 2017*

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*

Coordinate reference systems flatten spatial data to allow for two dimensional visualization. Explore coordinate reference systems and spatial projection techniques.

*last updated: 23 Nov 2017*

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: 19 Oct 2017*

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

*last updated: 19 Oct 2017*

This lesson covers how to overlay raster data on a hillshade in R using baseplot and layer opacity arguments.

*last updated: 19 Oct 2017*