started USGS-VIZLAB#6, no style and wrong export

scripts/visualize/visualize-map.R

@@ -7,6 +7,28 @@ size_map_svg <- function(sp){
   apply(sp::bbox(sp), 1, diff)/500000
 }
 
+visualize.map_thumbnail <- function(viz){
+  library(xml2)
+  data <- readDepends(viz)
+  states <- data[['state-map']]
+  sites <- data[['site-map']]
+  bars <- data[['bar-data']]
+  png(filename = viz[['location']], width = 250, height = 250, units = 'px')
+  par(mai=c(0,0,0,0), omi=c(0,0,0,0))
+  sp::plot(states, expandBB = c(0.7,0,0,0))
+  sp::plot(sites, add=TRUE, pch = 20, cex=0.1)
+  bars.xml <- xml2::read_xml(bars)
+  rects <- xml_children(bars.xml)
+  xleft <- xml_attr(rects, 'x') %>% as.numeric()
+  ys <- xml_attr(rects, 'y') %>% as.numeric()
+  ytop <- max(ys) - ys
+  ybottom <- 0
+  xright <- xml_attr(rects, 'width') %>% as.numeric %>%  + xleft
+  par(new=TRUE, mar=c(0,0,10,0))
+  plot(0,NA, xlim = c(0,tail(xright,1)), ylim = c(0, max(ys)), axes=FALSE , ylab="", xlab="")
+  rect(xleft, ybottom, xright, ytop, col='dodgerblue', border = NA)
+  dev.off()
+}
 visualize.states_svg <- function(viz){
   data <- readDepends(viz)
   states <- data[['state-map']]

viz.yaml

@@ -224,6 +224,13 @@ visualize:
     scripts: ["scripts/process/doy.R","scripts/visualize/visualize-map.R"]
     title: "NM through the ages"
     alttext: "NM gage"
+  -
+    id: thumbnail-map
+    location: figures/thumb-gages-ages.png
+    visualizer: map_thumbnail
+    scripts: ["scripts/visualize/visualize-map.R"]
+    depends: ["state-map", "site-map", "watermark", "bar-data"]
+    export: true
 publish:
   -
     id: vizCSS