inst/shiny/mapData.R

In USGS-R/AWUDS: wateRuse data analysis functions

output$mapData <- renderPlotly({
  mapData <- mapData()
  ggplotly(mapData, tooltip = "label", width = 700, height = 400)
})

mapData <- reactive({
  
  w.use <- w.use()

  norm.element <- df[["data.element.norm"]]
  
  unit.type <- ifelse(input$unitTypeHUC, "huc", "county")
  
  if(norm.element == "None"){
    norm.element <- NA
  }
  
  if((df[["area.column"]] %in% c("Area", "Area.Name", "STATECOUNTYCODE", "HUCCODE", "COUNTYNAME"))){
    
    if((df[["area.column"]] %in% c("Area", "Area.Name"))){
      if(!(input$unitTypeHUC)){
        if (df[["area.column"]] == c("Area.Name")){
          w.use$STATECOUNTYCODE <- paste0(stateCd$STATE[which(stateCd$STATE_NAME == input$stateToMap)],w.use[[c("Area")]])  
        }else{
          w.use$STATECOUNTYCODE <- paste0(stateCd$STATE[which(stateCd$STATE_NAME == input$stateToMap)],w.use[[df[["area.column"]]]])  
        }
        
      } else {
        w.use$HUCCODE <- w.use[[df[["area.column"]]]]
      }
    } 
    
    w.use$YEAR <- as.integer(sapply(strsplit(w.use$YEAR, "_"), function(x) x[[1]][1]))
    mapData <- choropleth_plot(w.use, df[["data.element"]], year = as.integer(sapply(strsplit(input$year_x, "_"), function(x) x[[1]][1])),
                                 state = input$stateToMap, norm.element = norm.element, unit.type = unit.type)

  } else {
    mapData <- ggplot(data = mtcars) +
      geom_text(x=0.5, y=0.5, label = "Choose new state or use County or HUC data")
  }
  
  mapData
  
})
# 
# output$hover_map <- renderPrint({
#   txt <- ""
#   
#   hover=input$hover_map
#   
#   if(!is.null(hover)){
#     
#     data <- histCounties
#     point.to.check <- SpatialPoints(data.frame(x = hover$x, y=hover$y), proj4string=CRS(proj4string(data)))
#     
#     dist=over(point.to.check, data)
#     txt <- dist$FIPS
#   }
#   
#   cat("Site: ", txt)
# })

output$downloadMap <- downloadHandler(
  filename = function() { "map.png" },
  content = function(file) {
    ggsave(file, plot = mapData(), device = "png")
  }
)