City Map Poster Generator

Generate beautiful, minimalist map posters for any city in the world.

Examples

Country	City	Theme
USA	San Francisco	sunset
Spain	Barcelona	warm_beige
Italy	Venice	blueprint
Japan	Tokyo	japanese_ink
India	Mumbai	contrast_zones
Morocco	Marrakech	terracotta
Singapore	Singapore	neon_cyberpunk
Australia	Melbourne	forest
UAE	Dubai	midnight_blue
USA	Seattle	emerald

Installation

With uv (Recommended)

Make sure uv is installed. Running the script by prepending uv run automatically creates and manages a virtual environment.

# First run will automatically install dependencies
uv run ./create_map_poster.py --city "Paris" --country "France"

# Or sync dependencies explicitly first (using locked versions)
uv sync --locked
uv run ./create_map_poster.py --city "Paris" --country "France"

With pip + venv

python -m venv .venv
source .venv/bin/activate  # On Windows: .venv\Scripts\activate
pip install -r requirements.txt

Usage

Generate Poster

If you're using uv:

uv run ./create_map_poster.py --city <city> --country <country> [options]

Otherwise (pip + venv):

python create_map_poster.py --city <city> --country <country> [options]

Required Options

Option	Short	Description
`--city`	`-c`	City name (used for geocoding)
`--country`	`-C`	Country name (used for geocoding)

Optional Flags

Option	Short	Description	Default
OPTIONAL: `--latitude`	`-lat`	Override latitude center point (use with --longitude)
OPTIONAL: `--longitude`	`-long`	Override longitude center point (use with --latitude)
OPTIONAL: `--country-label`		Override country text displayed on poster
OPTIONAL: `--theme`	`-t`	Theme name	terracotta
OPTIONAL: `--distance`	`-d`	Map radius in meters	18000
OPTIONAL: `--list-themes`		List all available themes
OPTIONAL: `--all-themes`		Generate posters for all available themes
OPTIONAL: `--width`	`-W`	Image width in inches	12 (max: 20)
OPTIONAL: `--height`	`-H`	Image height in inches	16 (max: 20)

Multilingual Support - i18n

Display city and country names in your language with custom fonts from google fonts:

Option	Short	Description
`--display-city`	`-dc`	Custom display name for city (e.g., "東京")
`--display-country`	`-dC`	Custom display name for country (e.g., "日本")
`--font-family`		Google Fonts family name (e.g., "Noto Sans JP")

Examples:

# Japanese
python create_map_poster.py -c "Tokyo" -C "Japan" -dc "東京" -dC "日本" --font-family "Noto Sans JP"

# Korean
python create_map_poster.py -c "Seoul" -C "South Korea" -dc "서울" -dC "대한민국" --font-family "Noto Sans KR"

# Arabic
python create_map_poster.py -c "Dubai" -C "UAE" -dc "دبي" -dC "الإمارات" --font-family "Cairo"

Note: Fonts are automatically downloaded from Google Fonts and cached locally in fonts/cache/.

Resolution Guide (300 DPI)

Use these values for -W and -H to target specific resolutions:

Target	Resolution (px)	Inches (-W / -H)
Instagram Post	1080 x 1080	3.6 x 3.6
Mobile Wallpaper	1080 x 1920	3.6 x 6.4
HD Wallpaper	1920 x 1080	6.4 x 3.6
4K Wallpaper	3840 x 2160	12.8 x 7.2
A4 Print	2480 x 3508	8.3 x 11.7

Usage Examples

Basic Examples

# Simple usage with default theme
python create_map_poster.py -c "Paris" -C "France"

# With custom theme and distance
python create_map_poster.py -c "New York" -C "USA" -t noir -d 12000

Multilingual Examples (Non-Latin Scripts)

Display city names in their native scripts:

# Japanese
python create_map_poster.py -c "Tokyo" -C "Japan" -dc "東京" -dC "日本" --font-family "Noto Sans JP" -t japanese_ink

# Korean
python create_map_poster.py -c "Seoul" -C "South Korea" -dc "서울" -dC "대한민국" --font-family "Noto Sans KR" -t midnight_blue

# Thai
python create_map_poster.py -c "Bangkok" -C "Thailand" -dc "กรุงเทพมหานคร" -dC "ประเทศไทย" --font-family "Noto Sans Thai" -t sunset

# Arabic
python create_map_poster.py -c "Dubai" -C "UAE" -dc "دبي" -dC "الإمارات" --font-family "Cairo" -t terracotta

# Chinese (Simplified)
python create_map_poster.py -c "Beijing" -C "China" -dc "北京" -dC "中国" --font-family "Noto Sans SC"

# Khmer
python create_map_poster.py -c "Phnom Penh" -C "Cambodia" -dc "ភ្នំពេញ" -dC "កម្ពុជា" --font-family "Noto Sans Khmer"

Advanced Examples

# Iconic grid patterns
python create_map_poster.py -c "New York" -C "USA" -t noir -d 12000           # Manhattan grid
python create_map_poster.py -c "Barcelona" -C "Spain" -t warm_beige -d 8000   # Eixample district

# Waterfront & canals
python create_map_poster.py -c "Venice" -C "Italy" -t blueprint -d 4000       # Canal network
python create_map_poster.py -c "Amsterdam" -C "Netherlands" -t ocean -d 6000  # Concentric canals
python create_map_poster.py -c "Dubai" -C "UAE" -t midnight_blue -d 15000     # Palm & coastline

# Radial patterns
python create_map_poster.py -c "Paris" -C "France" -t pastel_dream -d 10000   # Haussmann boulevards
python create_map_poster.py -c "Moscow" -C "Russia" -t noir -d 12000          # Ring roads

# Organic old cities
python create_map_poster.py -c "Tokyo" -C "Japan" -t japanese_ink -d 15000    # Dense organic streets
python create_map_poster.py -c "Marrakech" -C "Morocco" -t terracotta -d 5000 # Medina maze
python create_map_poster.py -c "Rome" -C "Italy" -t warm_beige -d 8000        # Ancient layout

# Coastal cities
python create_map_poster.py -c "San Francisco" -C "USA" -t sunset -d 10000    # Peninsula grid
python create_map_poster.py -c "Sydney" -C "Australia" -t ocean -d 12000      # Harbor city
python create_map_poster.py -c "Mumbai" -C "India" -t contrast_zones -d 18000 # Coastal peninsula

# River cities
python create_map_poster.py -c "London" -C "UK" -t noir -d 15000              # Thames curves
python create_map_poster.py -c "Budapest" -C "Hungary" -t copper_patina -d 8000  # Danube split

# Override center coordinates
python create_map_poster.py --city "New York" --country "USA" -lat 40.776676 -long -73.971321 -t noir

# List available themes
python create_map_poster.py --list-themes

# Generate posters for every theme
python create_map_poster.py -c "Tokyo" -C "Japan" --all-themes

Distance Guide

Distance	Best for
4000-6000m	Small/dense cities (Venice, Amsterdam center)
8000-12000m	Medium cities, focused downtown (Paris, Barcelona)
15000-20000m	Large metros, full city view (Tokyo, Mumbai)

Themes

17 themes available in themes/ directory:

Theme	Style
`gradient_roads`	Smooth gradient shading
`contrast_zones`	High contrast urban density
`noir`	Pure black background, white roads
`midnight_blue`	Navy background with gold roads
`blueprint`	Architectural blueprint aesthetic
`neon_cyberpunk`	Dark with electric pink/cyan
`warm_beige`	Vintage sepia tones
`pastel_dream`	Soft muted pastels
`japanese_ink`	Minimalist ink wash style
`emerald`	Lush dark green aesthetic
`forest`	Deep greens and sage
`ocean`	Blues and teals for coastal cities
`terracotta`	Mediterranean warmth
`sunset`	Warm oranges and pinks
`autumn`	Seasonal burnt oranges and reds
`copper_patina`	Oxidized copper aesthetic
`monochrome_blue`	Single blue color family

Output

Posters are saved to posters/ directory with format:

{city}_{theme}_{YYYYMMDD_HHMMSS}.png

Adding Custom Themes

Create a JSON file in themes/ directory:

{
  "name": "My Theme",
  "description": "Description of the theme",
  "bg": "#FFFFFF",
  "text": "#000000",
  "gradient_color": "#FFFFFF",
  "water": "#C0C0C0",
  "parks": "#F0F0F0",
  "road_motorway": "#0A0A0A",
  "road_primary": "#1A1A1A",
  "road_secondary": "#2A2A2A",
  "road_tertiary": "#3A3A3A",
  "road_residential": "#4A4A4A",
  "road_default": "#3A3A3A"
}

Project Structure

map_poster/
├── create_map_poster.py    # Main script
├── font_management.py      # Font loading and Google Fonts integration
├── themes/                 # Theme JSON files
├── fonts/                  # Font files
│   ├── Roboto-*.ttf        # Default Roboto fonts
│   └── cache/              # Downloaded Google Fonts (auto-generated)
├── posters/                # Generated posters
└── README.md

Hacker's Guide

Quick reference for contributors who want to extend or modify the script.

Architecture Overview

┌─────────────────┐     ┌──────────────┐     ┌─────────────────┐
│   CLI Parser    │────▶│  Geocoding   │────▶│  Data Fetching  │
│   (argparse)    │     │  (Nominatim) │     │    (OSMnx)      │
└─────────────────┘     └──────────────┘     └─────────────────┘
                                                     │
                        ┌──────────────┐             ▼
                        │    Output    │◀────┌─────────────────┐
                        │  (matplotlib)│     │   Rendering     │
                        └──────────────┘     │  (matplotlib)   │
                                             └─────────────────┘

Key Functions

Function	Purpose	Modify when...
`get_coordinates()`	City → lat/lon via Nominatim	Switching geocoding provider
`create_poster()`	Main rendering pipeline	Adding new map layers
`get_edge_colors_by_type()`	Road color by OSM highway tag	Changing road styling
`get_edge_widths_by_type()`	Road width by importance	Adjusting line weights
`create_gradient_fade()`	Top/bottom fade effect	Modifying gradient overlay
`load_theme()`	JSON theme → dict	Adding new theme properties
`is_latin_script()`	Detects script for typography	Supporting new scripts
`load_fonts()`	Load custom/default fonts	Changing font loading logic

Rendering Layers (z-order)

z=11  Text labels (city, country, coords)
z=10  Gradient fades (top & bottom)
z=3   Roads (via ox.plot_graph)
z=2   Parks (green polygons)
z=1   Water (blue polygons)
z=0   Background color

OSM Highway Types → Road Hierarchy

# In get_edge_colors_by_type() and get_edge_widths_by_type()
motorway, motorway_link     → Thickest (1.2), darkest
trunk, primary              → Thick (1.0)
secondary                   → Medium (0.8)
tertiary                    → Thin (0.6)
residential, living_street  → Thinnest (0.4), lightest

Typography & Script Detection

The script automatically detects text scripts to apply appropriate typography:

Latin scripts (English, French, Spanish, etc.): Letter spacing applied for elegant "P A R I S" effect
Non-Latin scripts (Japanese, Arabic, Thai, Korean, etc.): Natural spacing for "東京" (no gaps between characters)

Script detection uses Unicode ranges (U+0000-U+024F for Latin). If >80% of alphabetic characters are Latin, spacing is applied.

Adding New Features

New map layer (e.g., railways):

# In create_poster(), after parks fetch:
try:
    railways = ox.features_from_point(point, tags={'railway': 'rail'}, dist=dist)
except:
    railways = None

# Then plot before roads:
if railways is not None and not railways.empty:
    railways.plot(ax=ax, color=THEME['railway'], linewidth=0.5, zorder=2.5)

New theme property:

Add to theme JSON: "railway": "#FF0000"
Use in code: THEME['railway']
Add fallback in load_theme() default dict

Typography Positioning

All text uses transform=ax.transAxes (0-1 normalized coordinates):

y=0.14  City name (spaced letters for Latin scripts)
y=0.125 Decorative line
y=0.10  Country name
y=0.07  Coordinates
y=0.02  Attribution (bottom-right)

Useful OSMnx Patterns

# Get all buildings
buildings = ox.features_from_point(point, tags={'building': True}, dist=dist)

# Get specific amenities
cafes = ox.features_from_point(point, tags={'amenity': 'cafe'}, dist=dist)

# Different network types
G = ox.graph_from_point(point, dist=dist, network_type='drive')  # roads only
G = ox.graph_from_point(point, dist=dist, network_type='bike')   # bike paths
G = ox.graph_from_point(point, dist=dist, network_type='walk')   # pedestrian

Performance Tips

Large dist values (>20km) = slow downloads + memory heavy
Cache coordinates locally to avoid Nominatim rate limits
Use network_type='drive' instead of 'all' for faster renders
Reduce dpi from 300 to 150 for quick previews

Name		Name	Last commit message	Last commit date
Latest commit History 49 Commits
.github/workflows		.github/workflows
fonts		fonts
posters		posters
test		test
themes		themes
.flake8		.flake8
.gitignore		.gitignore
CHANGELOG.md		CHANGELOG.md
LICENSE		LICENSE
README.md		README.md
create_map_poster.py		create_map_poster.py
font_management.py		font_management.py
pyproject.toml		pyproject.toml
requirements.txt		requirements.txt
uv.lock		uv.lock

License

originalankur/maptoposter

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