Blog
Engineering notes, migration guides, and product updates from the GoGoDuk Map API team.
Build a Store Locator for Vietnam with MapLibre and a Geocoding API
A practical Next.js tutorial for building a Vietnam store locator: address search, place resolution, nearest-branch ranking, and MapLibre markers without exposing your API key.
How Gogoduk Boosts API Performance and Simplifies Architecture with Redis 8.8
A production case study on how Gogoduk leverages Redis 8.8 to optimize API latency and reduce architectural complexity: replacing custom Lua rate limiters with INCREX and optimizing cache invalidation.
Optimizing Map Costs: Setting Up Free Staging & Testing Map APIs
Looking for a Map API solution for staging and testing? Learn how to reduce Google Maps API costs by using GoGoDuk's 100% free tier with no credit card required.
How to Build Delivery Zones in Vietnam using Map APIs
A step-by-step developer tutorial on how to implement location-based service boundaries, calculate shipping fees, and filter regions in Vietnam.
Self-hosting OpenStreetMap (OSM) Tile Server for Vietnam vs GoGoDuk Map API
Learn how to self-host a map tile server and Nominatim geocoder for Vietnam using Docker, hardware requirements, and maintenance costs compared to GoGoDuk.
Vietnam Address Autocomplete API: Build Better Checkout and Delivery Forms
How to design address autocomplete for Vietnamese checkout, delivery, and logistics flows using partial input, diacritics, place IDs, and validation.
Vietnam's 2025 Province Merger: Normalizing Old → New Addresses with an API
After the merger, Vietnam has 34 provinces. Old address data now breaks logistics, e-commerce, and CRM systems. Here's how to normalize old → new addresses with an admin-boundary API.
Reverse Geocoding API: Find Vietnam Province and District from GPS Coordinates
How to use reverse geocoding to turn latitude/longitude into current Vietnam province and district data for delivery zones, driver tracking, CRM, and reporting.
Best Vietnam Map APIs in 2026: Google Maps vs Goong vs Mapbox vs OpenStreetMap vs GoGoDuk
A detailed comparison of the best map APIs for Vietnam in 2026 — pricing, free tiers, Vietnamese address quality, admin boundaries. Find the right Google Maps API alternative.
Google Maps API Restricted in Vietnam: Common Errors and What to Do Next
Why Google Maps API billing can be hard for Vietnam-based teams, the errors developers usually see, and how to decide whether to debug billing or migrate geocoding to GoGoDuk.
What Is Geocoding? Converting Addresses to Coordinates in Vietnam
What geocoding is, how forward and reverse geocoding differ, real-world uses in Vietnam, and how to call an API to turn addresses into latitude/longitude — with code examples.
Why we built a free map API for Vietnam
GoGoDuk is a free-forever map API for Vietnam. Here's why we built it, why we won't charge, and who it's for.
Vietnam admin boundaries: 34 provinces, 3,323 districts, and rich metadata
How GoGoDuk's admin-boundary endpoint works today — province and district polygons plus population, area, contact info, and centroids.
Geocoding Vietnamese addresses: edge cases
Diacritics, alley numbering, ward renames, and the other Vietnamese-address quirks that break naive geocoders — and how GoGoDuk handles them.
Migrate from Google Maps Geocoding API to GoGoDuk in 5 minutes
A drop-in migration guide from Google Maps Geocoding API to GoGoDuk — same fields, same response shape, free forever for Vietnam.
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