A comprehensive evaluation of different technologies and frameworks for building spatially-enabled data applications. This repository contains prototypes and tests to compare various options for creating interactive map-based data visualization tools.
Test and compare different technology stacks for building data applications with spatial/mapping capabilities, focusing on:
- MapLibre GL integration - Compatibility and ease of integration
- Web deployment - Ability to deploy as web applications
- Development experience - Language, ecosystem, and tooling
- Cross-platform support - Web, mobile, and desktop capabilities
- Performance - Rendering speed and resource usage
- Next.js - React-based framework with SSR/SSG
- Svelte - Lightweight reactive framework
- Vue - Progressive JavaScript framework
- Angular - Full-featured TypeScript framework
- Blazor - C#/.NET WebAssembly framework
- Flutter - Cross-platform framework using Dart
- Streamlit - Python-based data app framework with simple API
- Dash - Python framework by Plotly for analytical web apps
- FastHTML - Python HTML-first framework for lightweight server-rendered apps
- Reflex - Python full-stack framework with React-like components
The following technologies were considered but excluded from testing for specific reasons:
- Unity, Unreal Engine, Godot - These are designed for 3D game development and are overkill for 2D mapping applications. They have poor web performance, complex MapLibre GL integration challenges, and are not optimized for data-driven applications.
- Power BI - Closed Microsoft ecosystem with limited MapLibre integration and not designed for building custom spatial applications.
- Grafana - Optimized for time-series monitoring and observability, not general-purpose spatial data visualization.
- Metabase, Apache Superset - Business intelligence dashboarding tools with limited support for custom interactive map experiences.
- Tauri - Desktop and mobile only, no web deployment support which is a core requirement.
- Kotlin Multiplatform - Requires IntelliJ IDEA or Android Studio for optimal development experience. While VS Code plugins exist, the tooling, debugging, and project setup heavily favor JetBrains IDEs, making it impractical for VS Code-centric workflows.
- Voilà - Simply converts Jupyter notebooks to web apps; not a framework for building production data applications.
- Yew - Rust WebAssembly framework adds unnecessary complexity for MapLibre GL integration compared to standard JavaScript frameworks.
- Quarto - Technical publishing and documentation system, not designed for interactive applications.
- Gradio - ML demo-focused framework with limited UI customization; too specialized for building rich spatial data applications.
- Shiny - Primarily R-focused (Python support secondary); better alternatives exist for Python-based spatial apps.
- Taipy - Newer framework with less mature ecosystem and limited MapLibre GL integration examples.
- Panel - Similar to Streamlit but less mature ecosystem. Streamlit, Dash, and FastHTML already provide comprehensive Python data app coverage across rapid prototyping, dashboards, and lightweight custom web apps.
- Kepler.gl - Visualization component/tool, not a framework for building custom applications. Designed for geospatial data exploration rather than building full data apps.
- Observable - JavaScript notebook platform designed for data visualization and exploration, runs in browser only. Cannot write to databases without separate backend services. Better suited for prototyping than building full applications.
- Evidence - BI reporting tool focused on reading and displaying data via markdown/SQL. Not designed for transactional operations or database writes. Lacks the interactive form components needed for data entry applications.
Note: All web frameworks require foundational knowledge of HTML, CSS, and JavaScript/TypeScript. They also share common requirements including understanding of reactivity patterns, component lifecycle management, and API development for backend integration. The differences lie primarily in syntax, tooling, and architectural patterns.
| Framework | Type | Location | Status | Setup Steps | Notes |
|---|---|---|---|---|---|
| Next.js | Web | nextjs_data_app/ |
✅ Implemented | 5 | Easy: Create files in src/components/, use 'use client' for interactivity. Excellent TypeScript support, built-in routing. Strong ecosystem for future features. |
| Svelte | Web | svelte_data_app/ |
✅ Implemented | 4 | Very Easy: Create .svelte files in src/lib/components/. Minimal boilerplate, reactive by default. Svelte stores for state management. Clean, intuitive syntax for rapid development. |
| Vue | Web | vue_data_app/ |
✅ Implemented | 5 | Easy: Create .vue files in src/components/. Composition API provides flexible reactivity. Good balance of simplicity and power for scaling applications. |
| Angular | Web | angular_data_app/ |
✅ Implemented | 7 | Moderate: Use ng generate component CLI. More setup required (module imports, types). Enterprise-ready with comprehensive tooling. Best for large teams and complex apps. |
| Blazor | Web | blazor_data_app/ |
✅ Implemented | 5 | Moderate: C#/.NET WebAssembly. MapLibre GL integrated via JS interop module. Razor components for UI. Ideal for .NET teams building web apps. Static deployment possible. |
| Flutter | Multi-Platform | flutter_data_app/ |
✅ Implemented | 6 | Moderate: Multi-platform (Web, Android, iOS). Requires platform-specific configs (permissions, minSDK, web index.html). Dart language. Hot reload for fast iteration. Strong for mobile-first apps. |
| Framework | Location | Status | Setup Steps | Notes |
|---|---|---|---|---|
| Streamlit | streamlit_data_app/ |
✅ Implemented | 3 | Very Easy: PyDeck built-in, uses MapLibre GL JS natively. Reactive by default. Sidebar controls auto-refresh. Viewport state preserved across reruns. Perfect for rapid prototyping. Known deficiency: robust map-click-to-table-row synchronization is limited in native Streamlit + PyDeck without custom components. |
| Dash | dash_data_app/ |
✅ Implemented | 3 | Easy: Plotly-based with MapLibre GL JS rendering. Callback system for reactivity. More layout control than Streamlit. Good for custom dashboards. |
| FastHTML | fasthtml_data_app/ |
✅ Implemented | 3 | Easy: HTML-first Python framework. MapLibre GL JS integrates directly with script tags and minimal boilerplate. Good for lightweight, server-rendered apps. |
| Reflex | reflex_data_app/ |
❌ FAILED | - | Failed: JavaScript integration issues. Scripts embedded via rx.script() or rx.html() do not execute reliably. Unable to initialize MapLibre GL despite multiple approaches. Not suitable for complex third-party JS library integration. |
ANGULAR.md- Angular implementation guide with MapLibre GLBLAZOR.md- Blazor WebAssembly implementation guideDASH.md- Dash with Plotly implementation guideFASTHTML.md- FastHTML implementation guideFLUTTER.md- Flutter setup and integration guideNEXTJS.md- Next.js comprehensive implementation guideREFLEX.md- Reflex full-stack Python implementation guideSTREAMLIT.md- Streamlit with PyDeck implementation guideSVELTE.md- Svelte implementation guideVUE.md- Vue.js implementation notes
| Framework | MapLibre Compatibility | Integration Method | Difficulty | GeoJSON Support |
|---|---|---|---|---|
| Next.js | ⭐⭐⭐ High | Direct JS library import | Easy | Excellent |
| Svelte | ⭐⭐⭐ High | Direct JS library import | Very Easy | Excellent |
| Vue | ⭐⭐⭐ High | Direct JS library import | Easy | Excellent |
| Angular | ⭐⭐⭐ High | Direct JS library import | Moderate | Excellent |
| Blazor | ⭐⭐⭐ High | JS interop (CDN) | Moderate | Excellent |
| Flutter | ⭐⭐ Medium | maplibre_gl package | Moderate | Good (requires JSON parsing) |
| Streamlit | ⭐⭐⭐ High | PyDeck (MapLibre GL JS) | Very Easy | Excellent |
| Dash | ⭐⭐⭐ High | Plotly (MapLibre GL JS) | Easy | Excellent |
| FastHTML | ⭐⭐⭐ High | Direct MapLibre GL JS script integration | Easy | Excellent |
| Reflex | ❌ Failed | N/A | N/A | Failed - Script execution issues |
| Framework | Setup Time | Learning Curve | Hot Reload | State Management | Code Verbosity |
|---|---|---|---|---|---|
| Svelte | ~5 min | Low | ⚡ Instant | Reactive variables | Medium |
| Next.js | ~8 min | Low-Medium | ⚡ Fast | React hooks | Medium |
| Vue | ~8 min | Low-Medium | ⚡ Fast | Composition API | Medium |
| Dash | ~5 min | Medium | 🔄 Moderate | Callbacks | Medium |
| FastHTML | ~5 min | Low | ⚡ Fast | HTML + lightweight JS handlers | Medium-High |
| Reflex | ~8 min | Medium | ⚡ Fast | State class | Low-Medium |
| Streamlit | ~3 min | Very Low | ⚡ Fast | Auto-refresh | Low-Medium |
| Blazor | ~10 min | Medium | ⚡ Fast | Component state | Medium |
| Angular | ~15 min | Medium-High | 🔄 Moderate | Services/Signals | High |
| Flutter | ~10 min | Medium | ⚡ Fast | StatefulWidget | High |
| Framework | Lines of Code | Implementation Approach |
|---|---|---|
| Streamlit | ~143 | Sidebar-driven point focus, highlighted markers, dataframe display |
| Dash | ~299 | Callback graph updates + DataTable row selection + map click sync + modernized UI polish |
| FastHTML | ~331 | Server-rendered table + client-side MapLibre feature/state synchronization + responsive alignment/resizing fixes |
| Svelte | ~312 | Reactive state + row click focus + map click to row synchronization |
| Vue | ~320 | Composition API + table/map selection sync + marker highlighting |
| Next.js | ~291 | React state + table/map selection sync + feature-state styling |
| Angular | ~218 (+template/CSS) | Component state + table/map sync + feature-state styling |
| Blazor | ~196 (+JS interop) | C# table selection + JS feature tap callbacks + map focus |
| Flutter | ~367 | Stateful map, table selection, custom tap handling, manual zoom controls |
| Reflex | ❌ Failed | N/A - Script execution issues prevented completion |
| Framework | Table -> Map | Map -> Table | Reliability |
|---|---|---|---|
| Dash | ✅ Strong | ✅ Strong | High |
| Next.js | ✅ Strong | ✅ Strong | High |
| Svelte | ✅ Strong | ✅ Strong | High |
| Vue | ✅ Strong | ✅ Strong | High |
| Angular | ✅ Strong | ✅ Strong | High |
| Blazor | ✅ Strong | ✅ Strong | High |
| FastHTML | ✅ Strong | ✅ Strong | High |
| Streamlit | ✅ Good | Medium-Low | |
| Flutter | ✅ Good | Medium-Low | |
| Reflex | ❌ Failed | ❌ Failed | Failed |
| Framework | Static Export | SSR/SSG | Container | Edge Functions | Ease of Deployment |
|---|---|---|---|---|---|
| Next.js | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Vercel | ⭐⭐⭐ Excellent |
| Svelte | ✅ Yes | ✅ Yes (SvelteKit) | ✅ Yes | ✅ Vercel/Netlify | ⭐⭐⭐ Excellent |
| Vue | ✅ Yes | ✅ Yes (Nuxt) | ✅ Yes | ✅ Vercel/Netlify | ⭐⭐⭐ Excellent |
| Blazor | ✅ Yes | ❌ No | ✅ Yes | ⭐⭐⭐ Excellent (Static) | |
| Reflex | ❌ Failed | ❌ Failed | N/A | N/A | ❌ Test Failed |
| Dash | ❌ No | ❌ No | ✅ Yes | ❌ No | ⭐⭐ Good (Cloud/Docker) |
| FastHTML | ❌ No | ✅ Yes | ✅ Yes | ⭐⭐ Good (ASGI/Cloud) | |
| Angular | ✅ Yes | ✅ Yes (Universal) | ✅ Yes | ⭐⭐ Good | |
| Streamlit | ❌ No | ❌ No | ✅ Yes | ❌ No | ⭐⭐ Good (Cloud/Docker) |
| Flutter | ✅ Web only | ❌ No | ✅ Yes | ❌ No | ⭐ Fair |
- Dash - Python-based, strong map-table synchronization, still fast to iterate
- Streamlit - Python-based, fastest setup but weaker native map-click-to-table synchronization
- Svelte - JavaScript-based, minimal boilerplate, very intuitive for JS developers
- Vue - JavaScript-based, clean syntax, good documentation
- Next.js - Full-featured, excellent ecosystem, strong deployment options
- Svelte - Great performance, clean code, growing ecosystem
- Vue - Mature, flexible, good balance of features
- Flutter - True multi-platform (Web/iOS/Android/Desktop) from a single codebase, but web performance varies. (Blazor WebAssembly is web-only; multi-platform requires separate MAUI project, no web support)
- Angular - Comprehensive tooling, strong typing, established patterns
- Next.js - Strong ecosystem, great developer experience
Tie: All frameworks except Flutter - JavaScript frameworks (Svelte, Next.js, Vue, Angular), .NET framework (Blazor via JS interop), and Python frameworks (Streamlit, Dash, FastHTML) all have excellent MapLibre GL JS integration. Flutter has medium compatibility requiring a package wrapper.
Streamlit - still the lowest setup friction, but no longer the strongest option for robust two-way map-table interaction.
Each prototype has its own README with specific setup instructions:
- Next.js: See
NEXTJS.md - Svelte: See
SVELTE.md - Vue: See
VUE.md - Angular: See
ANGULAR.md - Blazor: See
BLAZOR.md - Flutter: See
FLUTTER.md - Streamlit: See
STREAMLIT.md - Dash: See
DASH.md - FastHTML: See
FASTHTML.md - Reflex: See
REFLEX.md(⚠️ Test Failed)
# Angular
cd angular_data_app
npm install
npx ng serve
# Blazor (Web)
cd blazor_data_app
dotnet run
# Dash
cd dash_data_app
uv sync
uv run python app.py
# FastHTML
cd fasthtml_data_app
uv sync
uv run python app.py
# Flutter (Web)
cd flutter_data_app
flutter pub get
flutter run -d chrome
# Next.js
cd nextjs_data_app
npm install
npm run dev
# Streamlit
cd streamlit_data_app
uv sync
uv run streamlit run app.py
# Svelte
cd svelte_data_app
npm install
npm run dev
# Vue
cd vue_data_app
npm install
npm run dev
# Reflex (⚠️ FAILED - Not functional)
# cd reflex_data_app
# uv sync
# uv run reflex init
# uv run reflex runThis is a testing and evaluation repository. Each prototype demonstrates:
- Basic MapLibre GL map integration
- Two GeoJSON layers (sample regions and points of interest)
- Layer toggle menu for individual layer control
- Interactive navigation components
- Framework-specific best practices
See LICENSE file for details.
Performance & Bundle Size
(To be added: Detailed performance benchmarks)
Future Work Performance benchmarks (load time, FPS, memory usage) Bundle size comparisons Production deployment examples for each framework Advanced MapLibre GL features (3D, clustering, custom styles) Backend integration patterns
- Full-Stack Apps: Reflex (pure Python with React performance, 170 lines, state-based)
Stick with Python Frameworks (Streamlit/Dash) if:
- User base: <200 concurrent users
- Use case: Internal tools, dashboards, data exploration
- UI needs: Standard controls, charts, maps are sufficient
- Team: Python developers who want to stay in Python
- Priority: Fast development and maintenance
Consider JavaScript Frameworks (Next.js/Svelte/Vue) when:
-
Complex UI Requirements:
- Heavy real-time collaboration (multiple users editing simultaneously)
- Complex drag-and-drop interactions
- Custom animations and transitions
- Offline-first applications
- Very custom UI/UX not achievable with standard components
-
High Traffic/Performance Needs:
- Thousands of concurrent users
- Need for static site generation (SSG) for performance
- Edge deployment requirements
- Mobile app-like experience required
-
Public-Facing Applications:
- SEO-critical content
- Public website with marketing pages
- E-commerce or consumer-facing apps
-
Team/Ecosystem Requirements:
- Team has JavaScript/TypeScript expertise
- Need to integrate with complex frontend ecosystem
- Building a product that will scale to enterprise complexity
Bottom Line: Don't choose Next.js/Svelte/Vue just because they're "modern" or "better" - they add significant complexity. Choose them when Streamlit/Dash actually can't deliver the UX you need or handle your scale.
For Python Developers:
- Quick Prototyping: Streamlit (simplest setup, but limited native map-click-to-table sync)
- Custom Dashboards / Reliable Interaction: Dash (strong two-way map-table sync, callback-based reactivity)
- Custom Python Web UX: FastHTML (strong two-way sync after layout/resizing fixes, but higher implementation overhead)
⚠️ Not Recommended: Reflex (failed - JavaScript integration issues prevent third-party library usage)
For JavaScript Developers:
- Rapid Development: Svelte (minimal boilerplate, very intuitive)
- Modern Web Apps: Next.js or Svelte (excellent DX, strong deployment)
- Enterprise Applications: Angular or Next.js (comprehensive tooling)
- Team Flexibility: Vue (good balance, easy to learn)
For Multi-Platform:
- Mobile + Web: Flutter (with caveats on web performance)
Successful Integrations:
- JavaScript frameworks (Svelte, Next.js, Vue, Angular) have native, straightforward integration
- Python frameworks (Streamlit via PyDeck, Dash via Plotly) use MapLibre GL JS natively
- Flutter requires a package but works well across platforms
Failed Integration:
- Reflex - Unable to reliably execute embedded JavaScript. Multiple approaches attempted (rx.script(), rx.html(), component-based) all failed. The React compilation layer interferes with direct script execution, making third-party JS library integration impractical.
Note: Plotly switched from Mapbox GL JS to MapLibre GL JS, eliminating the need for API tokens.
(To be added: Detailed performance benchmarks)
- Add table and sync selection with map
- Performance benchmarks (load time, FPS, memory usage)
- Bundle size comparisons
- Production deployment examples for each framework
- Advanced MapLibre GL features (3D, clustering, custom styles)
- Backend integration patterns