mirror of
https://github.com/dataforcanada/d4c-datapkg-statistical.git
synced 2026-06-13 14:10:55 +02:00
Add DuckDB and lonboard example. Still need lots of work to get it right
This commit is contained in:
Diego Ripley
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 330,
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"id": "56ac906e",
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"metadata": {},
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"outputs": [],
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"source": [
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"import duckdb\n",
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"import geopandas as gpd\n",
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"import jenkspy\n",
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"from lonboard import BitmapTileLayer, Map, PolygonLayer\n",
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"from lonboard.colormap import apply_categorical_cmap\n",
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"import numpy as np\n",
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"import pyarrow as pa"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"id": "708e293d",
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"metadata": {},
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"outputs": [],
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"source": [
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"con = duckdb.connect()\n",
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"con.install_extension(\"spatial\")\n",
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"con.load_extension(\"spatial\")"
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]
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},
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{
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"cell_type": "markdown",
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"id": "5d97e882",
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"metadata": {},
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"source": [
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"# 1.0 Total private dwellings and private dwellings per square kilometer for Ottawa\n",
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"These values are from the 2021 Census of Population"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 345,
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"id": "580c82ad-f64d-439f-9055-2307fdf7cccd",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"<duckdb.duckdb.DuckDBPyConnection at 0x7f069ca09ab0>"
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]
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},
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"execution_count": 345,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"con.execute(\"\"\"\n",
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"DROP TABLE IF EXISTS geo_data;\n",
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"CREATE TABLE geo_data AS\n",
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"SELECT\n",
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" geo.da_dguid,\n",
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" cop.count_total_1,\n",
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" cop.count_total_4,\n",
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" cop.count_total_6,\n",
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" cop.count_total_7,\n",
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" ROUND(\n",
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" (cop.count_total_4 / cop.count_total_7), 2\n",
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" ) AS count_total_4_per_square_km,\n",
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" geo.geom\n",
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"FROM\n",
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" 'https://data.dataforcanada.org/processed/statistics_canada/census_of_population/2021/tabular/da_2021.parquet' AS cop,\n",
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" 'https://data.dataforcanada.org/processed/statistics_canada/boundaries/2021/digital_boundary_files/da_2021.parquet' AS geo\n",
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"WHERE geo.csd_name IN ('Ottawa') AND cop.da_dguid = geo.da_dguid;\n",
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"\n",
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"\"\"\")\n",
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"\n",
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"con.execute(\"\"\"\n",
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"COPY geo_data TO './da_2021_private_dwellings.parquet' (FORMAT PARQUET);\n",
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"\"\"\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 346,
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"id": "e4794c4d-6013-40b5-8e59-046fc2495d34",
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"metadata": {},
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"outputs": [],
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"source": [
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"private_dwellings_per_square_km = con.execute(\"SELECT DISTINCT count_total_4_per_square_km FROM geo_data\").fetchall()\n",
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"\n",
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"values = np.array([v[0] for v in private_dwellings_per_square_km])\n",
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"\n",
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"# Compute Jenks breaks\n",
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"num_classes = 5\n",
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"breaks = jenkspy.jenks_breaks(values, n_classes=num_classes)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 347,
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"id": "8672f3f8-82bf-439e-8558-cb3566f2062f",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Create a bin range mapping: (lower, upper) for each bin\n",
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"bin_ranges = [(breaks[i], breaks[i+1]) for i in range(len(breaks)-1)]\n",
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"\n",
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"# Create a function to get the range string for a value\n",
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"def jenks_range(value) -> str:\n",
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" for i, (low, high) in enumerate(bin_ranges):\n",
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" if low <= value <= high:\n",
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" return f\"{int(low)}–{int(high)}\"\n",
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" return \"unknown\"\n",
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"\n",
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"\n",
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"dwellings_df = gpd.read_parquet('./da_2021_private_dwellings.parquet')\n",
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"dwellings_df['category'] = dwellings_df[\"count_total_4_per_square_km\"].apply(lambda v: jenks_range(v))\n",
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"dwellings_df['category'] = dwellings_df['category'].astype('category')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 353,
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"id": "f265300a-9cf7-4ab7-8bdb-d66feae3a2f8",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Categories to colors\n",
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"cmap = {}\n",
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"colors = [\n",
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" [255, 255, 255],\n",
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" [255, 191.25, 191.25],\n",
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" [255, 127.50, 127.50],\n",
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" [255, 63.75, 63.75],\n",
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" [255, 0, 0]\n",
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"]\n",
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"for index, value in enumerate(dwellings_df['category'].unique()):\n",
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" cmap[value] = colors[index]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 355,
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"id": "a6a2ae6c-61b7-4c0e-bbe7-a580a511ee5a",
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"metadata": {},
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"outputs": [],
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"source": [
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"# OpenStreetMap\n",
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"\n",
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"# We set `max_requests < 0` because `tile.openstreetmap.org` supports HTTP/2.\n",
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"basemap = BitmapTileLayer(\n",
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" data=\"https://tile.openstreetmap.org/{z}/{x}/{y}.png\",\n",
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" tile_size=256,\n",
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" max_requests=-1,\n",
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" min_zoom=0,\n",
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" max_zoom=19,\n",
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")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 356,
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"id": "56e96627-0e82-436a-bd8e-e51546c7526b",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Google Satellite\n",
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"basemap = BitmapTileLayer(\n",
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" data=\"http://mt0.google.com/vt/lyrs=s&hl=en&x={x}&y={y}&z={z}\",\n",
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" tile_size=256,\n",
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" max_requests=-1,\n",
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" min_zoom=0,\n",
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" max_zoom=19,\n",
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")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 357,
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"id": "fef53303-147d-44af-b8f4-b824f64b486f",
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"metadata": {},
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"outputs": [],
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"source": [
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"get_color = apply_categorical_cmap(pa.array(dwellings_df['category']), cmap)\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 358,
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"id": "6935a061-41fc-4223-b155-4caf4c6df103",
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"metadata": {},
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"outputs": [],
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"source": [
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"cop_layer = PolygonLayer.from_geopandas(gdf=gpf,\n",
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" stroked=True,\n",
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" get_fill_color=get_color,\n",
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" get_line_color=[255, 255, 255],\n",
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" get_line_width=5,\n",
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" line_width_units=\"meters\",\n",
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" opacity=0.4,\n",
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" auto_highlight = True,\n",
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" highlight_color=[0,0,0,0]\n",
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" )"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 359,
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"id": "1ab3dded-cff9-40cb-ac32-306581018083",
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"metadata": {},
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"outputs": [],
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"source": [
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"m = Map([basemap, cop_layer])"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 360,
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"id": "3ca8da4b-d287-47f9-8488-cff7b02586b8",
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"metadata": {},
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"outputs": [
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{
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"data": {
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"application/vnd.jupyter.widget-view+json": {
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"model_id": "fb9e669faec9417dbf4954620c6f9af6",
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"version_major": 2,
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"version_minor": 1
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},
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"text/plain": [
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"Map(custom_attribution='', layers=(BitmapTileLayer(data='http://mt0.google.com/vt/lyrs=s&hl=en&x={x}&y={y}&z={…"
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]
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},
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"execution_count": 360,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"m"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.12.3"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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