Mapping Abundance in Streams in R


I haven’t worked with raster or spatial polygon data in R much before, but I want to create maps to show the results of a spatiotemporal model. Specifically, I want to depict the changes in abundance of fish in a stream network over time and space. I decided to play around with various packages for manipulating spatial data and then using base `plot` and `ggplot2` functions to make the maps. Rather than post the code and output here, it was easier to publish it to RPubs and link to it: http://rpubs.com/djhocking/155740

Fish abundance in a stream network

Fish abundance in a stream network

The scale, colors, projection, and background will have to be adjusted based on the purpose of the map, but hopefully the code and explanations will help people get started. This was intended as a learning tool for me, rather than strictly as a tutorial, but I figured I would share in case it proved useful to others.

Here’s some links to additional information I found useful along the way:

Add a scale bar

Add a north arrow and scale bar

R GIS Tutorial

R CRS System by NCEAS

ggplot2 mapping in R by Zev Ross (he has tons of great info on his site!!!)

ggplot2 cheat sheet

raserVis – haven’t tried yet but looks very useful

Raster data in R by NEON

 

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