Symbolized lines question

[sstevens2]

How could the content be improved?

In Episode 8, the paragraph below talks about showing lines in the legend differently. From what I can tell, the way the lines show in the plot the previous plot and the next one isn't different, except for the custom colors. The lines in the legend seem to appear the same prior to show.legend = 'line being added. Maybe this is legacy behavior being decribed?

Next, let’s build a custom legend using the symbology (the colors and symbols) that we used to create the plot above. For example, it might be good if the lines were symbolized as lines. In the previous episode, you may have noticed that the default legend behavior for geom_sf is to draw a ‘patch’ for each legend entry. If you want the legend to draw lines or points, you need to add an instruction to the geom_sf call - in this case, show.legend = 'line'.

Which part of the content does your suggestion apply to?

https://datacarpentry.github.io/r-raster-vector-geospatial/08-vector-plot-shapefiles-custom-legend.html

[sstevens2]

From some playing around, it looks like removing that show.lines argument changes how the tower legend displays. Perhaps this could be clarified in this paragraph.

[sstevens2]

Think this is also complicating the answer to the next challenge. It does show.lines in the line layer and then seems to have to use the guide to show the legend as expected. But if you leave show lines out and the guide argument, you get the same plot.

ggplot() +
  geom_sf(data = lines_harv, aes(color = TYPE)) +
  geom_sf(data = plot_locations, aes(fill = soilTypeOr),
          shape = 21, show.legend = 'point') +
  scale_color_manual(name = "Line Type", values = road_colors) +
  scale_fill_manual(name = "Soil Type", values = blue_orange) +
  ggtitle("NEON Harvard Forest Field Site") +
  coord_sf()