Created
February 13, 2020 17:35
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| install.packages("needs") | |
| library(needs) | |
| needs(tidyverse, magrittr, rvest, sf, raster, rgdal) | |
| ireland_constits <- c("https://en.wikipedia.org/wiki/Carlow%E2%80%93Kilkenny_(D%C3%A1il_constituency)") %>% | |
| read_html() %>% | |
| html_nodes('div[aria-labelledby="Current_Dáil_constituencies"] tr:nth-child(2) ul li a') %>% | |
| html_attr("href") %>% | |
| tail(-1) %>% | |
| c("/wiki/Carlow%E2%80%93Kilkenny_(D%C3%A1il_constituency)", .) | |
| ireland_constit_results <- paste0("https://en.wikipedia.org", ireland_constits) %>% | |
| imap_dfr(~{ | |
| read_html(.x) %>% | |
| html_nodes("table.wikitable") %>% | |
| map_dfr(~{ | |
| council <- .x %>% html_node("th") %>% html_text() %>% str_replace_all("(2020 general election\\: )|\\[.+","") | |
| title <- .x %>% html_node("th a") %>% html_attr("title") %>% replace_na("foo") | |
| content <- .x | |
| if(title == "2020 Irish general election"){ | |
| party <- content %>% html_nodes("td:nth-child(2)") %>% html_text(T) | |
| FPv <- content %>% html_nodes("td:nth-child(4)") %>% html_text(T) %>% parse_number() | |
| return(tibble(party, FPv) %>% mutate(council)) | |
| }else{ | |
| } | |
| }) %>% | |
| compact() | |
| }) | |
| unzip("~/Downloads/ne_10m_populated_places.zip", exdir = "~/Downloads/ireland_pop_dens/populated_places") | |
| populated_places <- st_read("~/Downloads/ireland_pop_dens/populated_places/ne_10m_populated_places.shp") | |
| populated_places_IRL <- populated_places %>% | |
| filter(ADM0NAME == "Ireland") %>% | |
| dplyr::select(NAME, NATSCALE, geometry, LONGITUDE, LATITUDE) | |
| unzip("~/Downloads/ne_10m_admin_0_map_subunits.zip", exdir = "~/Downloads/GIS/world") | |
| ireland_island_map <- st_read("~/Downloads/GIS/world/ne_10m_admin_0_map_subunits.shp") %>% st_transform(4326) %>% filter(GU_A3 %in% c("IRL", "NIR")) | |
| # Ireland constituency shapefiles source: https://data.gov.ie/dataset/constituency-boundaries-ungeneralised-2017-osi-national-electoral-boundaries | |
| unzip("~/Downloads/Constituency_Boundaries_Ungeneralised_2017__OSi_National_Electoral_Boundaries.zip", exdir = "~/Downloads/ireland_pop_dens/constituencies_2017") | |
| ireland_constits_map <- st_read("~/Downloads/ireland_pop_dens/constituencies_2017/Constituency_Boundaries_Ungeneralised_2017__OSi_National_Electoral_Boundaries.shp") %>% st_transform(4326) | |
| ireland_constits_map %>% | |
| dplyr::select(ENGLISH_NA, geometry) %>% | |
| mutate(council = as.character(ENGLISH_NA) %>% str_replace_all("\\s\\(.+", "") %>% str_replace_all("^D$", "Dún Laoghaire")) %>% | |
| left_join( | |
| ireland_constit_results %>% | |
| filter(party == "Sinn Féin") %>% | |
| group_by(party, council) %>% | |
| summarise(FPv = sum(FPv)) %>% | |
| ungroup() %>% | |
| mutate(council = council %>% str_replace_all("–","-")) | |
| ) %>% | |
| mutate(FPv = replace(FPv, is.na(FPv), 0)) -> ireland_constits_map_SF | |
| ggplot() + | |
| theme_minimal() + | |
| theme( | |
| panel.grid.major = element_line(colour = 'transparent'), | |
| axis.text = element_blank(), | |
| axis.title = element_blank() | |
| ) + | |
| geom_sf(data=ireland_island_map, fill = "#CCCCCC", col = "transparent", size=0) + | |
| geom_sf(data=ireland_constits_map_SF, aes(fill = FPv), col = "transparent", size=0) + | |
| geom_sf(data=populated_places_IRL %>% filter(NATSCALE >= 0), col = "black") + | |
| geom_text(data=populated_places_IRL %>% filter(NATSCALE >= 0), aes(label = NAME, x = LONGITUDE, y = LATITUDE), col = "black", hjust=0) + | |
| scale_fill_gradientn(colours=c("#f2f2ee","#8d1a14"), limits=c(0,50), guide = guide_colorbar(ttile = "First preference votes (%)")) |
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