poiidx 0.0.1.post1

Efficient spatial indexing and querying of Points of Interest using PostgreSQL and PostGIS

poiidx

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poiidx is a Python library for efficient spatial indexing and querying of Points of Interest (POIs) using PostgreSQL and PostGIS. It enables you to quickly find nearby POIs, retrieve administrative boundaries, and explore geographic hierarchies based on OpenStreetMap data.

Table of Contents

• Installation
• Database Setup
• Usage
• License

Installation

pip install poiidx

Database Setup

Install PostgreSQL and PostGIS

Ubuntu/Debian:

sudo apt update
sudo apt install postgresql postgis

macOS:

brew install postgresql@16 postgis
brew services start postgresql@16

Arch Linux:

sudo pacman -S postgresql postgis
sudo -u postgres initdb -D /var/lib/postgres/data
sudo systemctl start postgresql

Create Database and User

# Create user
sudo -u postgres createuser -P poiidx_user
# Enter password when prompted

# Create database
sudo -u postgres createdb -O poiidx_user poiidx_db

# Enable PostGIS extension
sudo -u postgres psql -d poiidx_db -c "CREATE EXTENSION postgis;"

Usage

import poiidx
from shapely.geometry import Point

# Initialize the database connection
poiidx.init(
    host='localhost',
    database='poiidx_db',
    user='poiidx_user',
    password='your_secure_password',
    port=5432
)

# Find nearest POIs to a point (e.g., Berlin)
berlin_point = Point(13.4050, 52.5200)
nearest_pois = poiidx.get_nearest_pois(
    berlin_point,
    max_distance=1000,  # meters
    limit=5
)

for poi in nearest_pois:
    print(f"{poi['name']} - Region: {poi['region']}, Rank: {poi['rank']}")

# Get administrative hierarchy for a point
admin_hierarchy = poiidx.get_administrative_hierarchy(berlin_point)
for admin in admin_hierarchy:
    print(f"Level {admin['admin_level']}: {admin['name']}")

# Get administrative hierarchy as a formatted string
admin_str = poiidx.get_administrative_hierarchy_string(berlin_point)
print(admin_str)

# Get administrative hierarchy in a specific language (e.g., French)
admin_str_fr = poiidx.get_administrative_hierarchy_string(berlin_point, lang='fr')
print(admin_str_fr)

# Close the connection when done
poiidx.close()

License

poiidx is distributed under the terms of the MIT license.