Republic of Ireland electoral divisions

import os
from datetime import datetime, timezone
from zipfile import ZipFile
import matplotlib.pyplot as plt
import geopandas as gpd
import pooch

URL = (
    "https://opendata.arcgis.com/api/v3/datasets/"
    "429c839036934413bb740bea190f2596_0/downloads/data?"
    "format=shp&spatialRefId=2157&where=1%3D1"
)

KNOWN_HASH = None
FILE_NAME = "electoral-divisions-2019.zip"
SUB_DIR = os.path.join("data", "boundaries", "OSi")
DATA_FILE = os.path.join(SUB_DIR, FILE_NAME)
os.makedirs(SUB_DIR, exist_ok=True)

# download data if necessary
if not os.path.isfile(os.path.join(SUB_DIR, FILE_NAME)):
    pooch.retrieve(
        url=URL, known_hash=KNOWN_HASH, fname=FILE_NAME, path=SUB_DIR
    )

    with open(
        os.path.join(SUB_DIR, f"{FILE_NAME[:-4]}.txt"), "w", encoding="utf-8"
    ) as outfile:
        outfile.write(
            f"Data downloaded on: {datetime.now(tz=timezone.utc)}\n"
            f"Download URL: {URL}"
        )

Downloading data from 'https://opendata.arcgis.com/api/v3/datasets/429c839036934413bb740bea190f2596_0/downloads/data?format=shp&spatialRefId=2157&where=1%3D1' to file '/run/media/nms/Backup/Documents/Git/ClimAg/ClimAg/data/OSi/electoral-divisions-2019.zip'.
SHA256 hash of downloaded file: 6dabe10b8e36b256cc981e6967abf7e80d3caf77a957cf2d3a7a9d0dc24e0a3b
Use this value as the 'known_hash' argument of 'pooch.retrieve' to ensure that the file hasn't changed if it is downloaded again in the future.

ZipFile(DATA_FILE).namelist()

['Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.shp',
 'Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.shx',
 'Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.dbf',
 'Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.cpg',
 'Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.prj',
 'Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.xml']

data = gpd.read_file(
    f"zip://{DATA_FILE}!"
    "Electoral_Divisions_-_OSi_National_Statutory_Boundaries_-_2019.shp"
)

data.head()

	ED_ID	ENGLISH	GAEILGE	CONTAE	COUNTY	PROVINCE	GUID	CENTROID_X	CENTROID_Y	AREA	ESRI_OID	Shape__Are	Shape__Len	geometry
0	267160	TURNAPIN	Turnapain	Baile Átha Cliath	DUBLIN	Leinster	2ae19629-1cea-13a3-e055-000000000001	717365.57	740807.88	943505.13	1	9.435051e+05	4732.251966	POLYGON ((717716.712 741601.510, 717759.461 74...
1	27045	DRUMLUMMAN	Droim Lomáin	An Cabhán	CAVAN	Ulster	2ae19629-1caa-13a3-e055-000000000001	638130.82	789588.69	17617760.82	2	1.761776e+07	21762.101454	POLYGON ((637756.185 787640.988, 637753.646 78...
2	117019	CASTLEFORE	Baile Choille Fóir	Liatroim	LEITRIM	Connacht	2ae19629-171c-13a3-e055-000000000001	606853.02	809670.32	14080012.63	3	1.408001e+07	21907.071044	POLYGON ((608196.069 807618.950, 608244.536 80...
3	37135	RAHONA	Ráth Úna	An Clár	CLARE	Munster	2ae19629-1fec-13a3-e055-000000000001	481634.87	649839.86	24664562.56	4	2.466456e+07	35830.867808	POLYGON ((484212.068 651795.629, 484231.866 65...
4	167021	CROSSAKEEL	Crosa Caoil	An Mhí	MEATH	Leinster	2ae19629-1861-13a3-e055-000000000001	662161.01	774125.96	20159197.51	5	2.015920e+07	34415.329703	POLYGON ((663308.409 776111.796, 663305.294 77...

data.crs

<Derived Projected CRS: EPSG:2157>
Name: IRENET95 / Irish Transverse Mercator
Axis Info [cartesian]:
- E[east]: Easting (metre)
- N[north]: Northing (metre)
Area of Use:
- name: Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.
- bounds: (-10.56, 51.39, -5.34, 55.43)
Coordinate Operation:
- name: Irish Transverse Mercator
- method: Transverse Mercator
Datum: IRENET95
- Ellipsoid: GRS 1980
- Prime Meridian: Greenwich

base = data.plot(color="navajowhite", figsize=(7.5, 7.5))
data.boundary.plot(ax=base, color="darkslategrey", linewidth=0.2)
plt.tick_params(labelbottom=False, labelleft=False)
plt.tight_layout()
plt.show()

../_images/04b0b786dcec309c67652e6a0b2c231faccd587072f474d336911601ca8f4557.png

data.to_file(
    os.path.join("data", "boundaries", "boundaries_all.gpkg"),
    layer="OSi_IE_electoral_divisions_2019",
)

Republic of Ireland electoral divisions#

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