notes from session

[mdsumner]

Pulled from the etherpad

R Graphics and Mapping

samples on a map, bathymetry

map projections sp::spTransform raster::projectRaster
avoid reprojecting rasters and remodelling data, use extract

overlaying satellite data raster::extract(grid, polygon/points)
pkg:Raster

• super versatile, can handle many different formats

labels
use ggplot2 for better labelling
tip: use base map with labels already included
otherwise rely on manually entering spatial points and custom labels
SCAR gazetteer for placenames in R package:
https://github.com/AustralianAntarcticDataCentre/antanym

custom polygons

• use qgis

legends

• ggplot good for legends (sometimes incompatible)

What do you need?

• make a map from my field samples

• a nice map of the Southern ocean!
  leaflet() https://rpubs.com/bhaskarvk/leaflet-polarmaps

• quick tranformations of map projections

• http://proj4.org/ proj4 has documentation on projection formation that can be used to transform data

• Help overlaying spatial data on maps eg. satellite data. +1
• automatic? Cartographic labels of ocean features eg. Bounty Trough, Tasman Rise etc.
  creating custom polygons
  editting shapfiles ?polylines?
  *shape files in maps
  *visually appealing plots
  *regional SO map, plot sample data over oceanographic/bathymetry data
  *pretty figures also...how to make plots with lots of data points clear
  *Create a legend
  *Fix scales-make them meaningful
• Make colour bars with labels

• viridis colour palette; good contrast and colour blind friendly colours
  *Add background colour and pictures to plots
  *raster layers- the basics

• CCAMLR gis package available with relevant polygons/data layers for Southern Ocean biology; predominantly CCAMLR management areas

Piping:
Avoids nesting within functions...and indecipherable code.
Reorganises code

PLaces to find help/tutorials:
Data Carpentry
DataScienceHobart Github site > ISSUES
Software Carpentry Creating Publication-Quality Graphics
Rpubs http://rpubs.com/cyclemumner/aad-mapping-tips
Rpubs https://rpubs.com/bhaskarvk/leaflet-polarmaps