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Amap Tech

May 11, 2023 · Artificial Intelligence

A 20‑Year Review of AI Infrastructure Milestones

Over the past two decades, AI infrastructure has evolved from early distributed storage and MapReduce to GPU programming, modern package managers, in‑memory processing, deep‑learning frameworks, parameter servers, AI compilers, synthetic data pipelines, open‑source model hubs, and today’s large‑scale Kubernetes‑based clusters, forming the essential foundation for every breakthrough.

AI CompilersAI infrastructureDeep Learning Frameworks

0 likes · 29 min read

A 20‑Year Review of AI Infrastructure Milestones

Amap Tech

Mar 2, 2022 · Fundamentals

Why GPS Signal Can Be Weak and How to Mitigate It

GPS signals can become weak due to tiny phone antennas and strong electromagnetic interference—especially in cars—plus device‑specific hardware limits, but moving the phone, waiting a few seconds, and relying on sensor fusion, network‑based positioning, and advanced decoding algorithms can substantially improve accuracy.

AntennaDesignGNSSGPS

0 likes · 8 min read

Why GPS Signal Can Be Weak and How to Mitigate It

Amap Tech

Feb 21, 2022 · Mobile Development

AR Experience Value and Design Strategies Across Multiple Scenarios

Across social video calls, collaborative gaming, virtual furniture placement, and AR‑enhanced navigation, the article shows how 5G‑powered AR can boost presence, accuracy and convenience, while design strategies—optimal viewing angles, realistic scaling, safety‑aware cues, multimodal feedback, and gesture‑based mode switching—ensure intuitive, safe, and seamless user experiences in diverse scenarios.

5GARdesign strategy

0 likes · 7 min read

AR Experience Value and Design Strategies Across Multiple Scenarios

Amap Tech

Feb 21, 2022 · Information Security

Satellite Position Spoofing: Risks, Techniques, and Detection Methods

Satellite positioning spoofing—using ground‑based fake GNSS transmitters to broadcast counterfeit signals—poses serious risks such as cheating driving tests, fraud, ride‑hailing manipulation, drone interference, and anti‑tracking, while detection relies on power, direction, consistency checks and multi‑source validation, though no solution is foolproof.

GNSS spoofinganti-spoofinglocation security

0 likes · 10 min read

Satellite Position Spoofing: Risks, Techniques, and Detection Methods

Amap Tech

Jan 6, 2022 · Mobile Development

Three‑Year Full‑Chain Performance Optimization at Gaode Map: Strategies, Practices, and Results

Over three years Gaode Map halved overall latency by systematically identifying bottlenecks, applying reverse‑order targeted fixes, establishing forward‑order long‑term controls, and deploying adaptive resource scheduling, engine acceleration, H5 container enhancements, high‑performance components, and CI automation, resulting in sustainable core‑chain performance improvements and a better user experience.

Gaode MapOptimizationPerformance

0 likes · 18 min read

Three‑Year Full‑Chain Performance Optimization at Gaode Map: Strategies, Practices, and Results

Amap Tech

Jan 6, 2022 · Artificial Intelligence

Wuhan University and Amap Win the Smartphone‑Based Indoor Positioning Track at IPIN2021

Wuhan University and Amap clinched first place in IPIN 2021’s Smartphone‑Based Indoor Positioning track by fusing machine‑learning‑driven pedestrian dead‑reckoning with magnetic, Bluetooth and Wi‑Fi matching, achieving real‑time, high‑frequency indoor navigation using only a phone’s built‑in sensors.

IPIN2021indoor positioningmachine learning

0 likes · 6 min read

Wuhan University and Amap Win the Smartphone‑Based Indoor Positioning Track at IPIN2021

Amap Tech

Nov 4, 2021 · Backend Development

Simplifying Java Backend Unit Testing with JSON Serialization

This article shows how to streamline Java backend unit tests by loading JSON fixtures, deserializing them into objects, and re‑serializing results for concise assertions, while providing naming conventions, Maven setup, FastJSON tricks, and advanced Mockito techniques to replace verbose manual object construction.

JSONJavaMockito

0 likes · 30 min read

Simplifying Java Backend Unit Testing with JSON Serialization

Amap Tech

Nov 4, 2021 · Artificial Intelligence

POI Signboard Image Retrieval: Technical Solution, Model Design, and Future Directions

To efficiently filter unchanged POI signboards, the authors propose a multimodal image‑retrieval system that combines enhanced global and local visual features with BERT‑encoded OCR text, using metric learning and alignment techniques to achieve over 95 % accuracy while handling occlusion, viewpoint variation, and subtle text changes.

Multimodal LearningPOIcomputer vision

0 likes · 17 min read

POI Signboard Image Retrieval: Technical Solution, Model Design, and Future Directions

Amap Tech

Oct 14, 2021 · Artificial Intelligence

CCF Big Data & Computing Intelligence Contest – POI Name Generation Challenge

The 9th CCF Big Data & Computing Intelligence Contest partners with Gaode Map to launch a POI Name Generation challenge, requiring participants to fuse image, signboard detection, and OCR data to automatically produce accurate, fluent place names, with a ¥50,000 prize pool, weekly vouchers, and recruitment opportunities for global teams.

AINLPPOI

0 likes · 7 min read

CCF Big Data & Computing Intelligence Contest – POI Name Generation Challenge

Amap Tech

Sep 28, 2021 · R&D Management

CTO Reflections: The Evolution of Technology and Leadership at Ant Group and Alibaba

The article chronicles a senior engineer’s rise from a PHP/MySQL developer to CTO of Ant Group and Alibaba, illustrating how strategic shifts—from Java EE migration and cloud‑native, OceanBase‑based architectures to “going‑IOE” and massive payment scaling—paralleled business growth, while sharing six leadership principles, risk‑management lessons, and advice for cultivating future CTOs.

CTOR&D Managementcloud computing

0 likes · 28 min read

CTO Reflections: The Evolution of Technology and Leadership at Ant Group and Alibaba