Created
June 24, 2024 20:58
-
-
Save deanm0000/a8b72958b02f2981537ff7a3feac8f98 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import httpx | |
import asyncio | |
from bs4 import BeautifulSoup | |
import os | |
import geopandas as gpd | |
import pandas as pd | |
from pathlib import Path | |
from geoarrow.rust.core import ( | |
GeoTable, | |
write_parquet, | |
read_parquet, | |
) | |
import time | |
async def dl_file(url, sem, client): | |
async with sem: | |
resp = await client.get(url) | |
file = url.split("/")[-1] | |
with open(f"./tracts/{file}", "wb") as ff: | |
ff.write(resp.content) | |
async def get_tract_data(): | |
client = httpx.AsyncClient( | |
headers={ | |
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8", | |
"accept-language": "en-US,en;q=0.9", | |
"cache-control": "no-cache", | |
"pragma": "no-cache", | |
"priority": "u=0, i", | |
"sec-ch-ua": '"Not/A)Brand";v="8", "Chromium";v="126", "Brave";v="126"', | |
"sec-ch-ua-mobile": "?0", | |
"sec-ch-ua-platform": '"Windows"', | |
"sec-fetch-dest": "document", | |
"sec-fetch-mode": "navigate", | |
"sec-fetch-site": "none", | |
"sec-fetch-user": "?1", | |
"sec-gpc": "1", | |
"upgrade-insecure-requests": "1", | |
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36", | |
} | |
) | |
census_page = await client.get( | |
"https://www.census.gov/cgi-bin/geo/shapefiles/index.php?year=2023&layergroup=Census+Tracts" | |
) | |
bs_page = BeautifulSoup(census_page.content, "html.parser") | |
urls = [ | |
f"https://www2.census.gov/geo/tiger/TIGER2023/TRACT/tl_2023_{x.attrs['value']}_tract.zip" | |
for x in bs_page.find_all("option") | |
] | |
try: | |
os.mkdir("./tracts") | |
except FileExistsError: | |
pass | |
sem = asyncio.Semaphore(5) | |
tasks = set() | |
for url in urls: | |
tasks.add(asyncio.create_task(dl_file(url, sem, client))) | |
await asyncio.wait(tasks) | |
all_states = [] | |
for tract in Path("tracts/2023").iterdir(): | |
all_states.append(gpd.read_file(tract)) | |
df = pd.concat(all_states) | |
df.to_parquet("tracts2023gpd.parquet") | |
geodf = GeoTable.from_geopandas(df) | |
write_parquet(geodf, "tracts2023geo.parquet") | |
def main(): | |
df = read_parquet("tracts2023geo.parquet") | |
strt=time.time() | |
df.geometry.simplify(0.5) | |
print(f"geoarrow simplify took {time.time()-strt} seconds") | |
dfgpd = df.to_geopandas() | |
strt=time.time() | |
dfgpd.geometry.simplify(0.5) | |
print(f"geopandas simplify took {time.time()-strt} seconds") |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment