mapping | BestHub

Zhengtong Technical Team

Apr 15, 2025 · Artificial Intelligence

FAST‑LIO2 LiDAR‑IMU SLAM Implementation and Evaluation on Qiji Autonomous Patrol Vehicles

This article presents the technical background of SLAM, explains why GNSS‑based navigation fails in complex urban environments, describes the selection and testing of several LiDAR‑IMU SLAM algorithms—including FAST‑LIO2—on Qiji unmanned vehicles, and details the hardware configuration, algorithmic improvements, experimental workflow, and positioning results achieved in a real‑world patrol project.

FAST-LIO2LiDARRobotics

0 likes · 9 min read

FAST‑LIO2 LiDAR‑IMU SLAM Implementation and Evaluation on Qiji Autonomous Patrol Vehicles

DeWu Technology

Apr 9, 2025 · Databases

Understanding Elasticsearch Indexes, Mappings, and Shard Architecture

The article explains Elasticsearch indexes as logical namespaces for JSON documents, details how mappings define immutable field types such as text, keyword, and numeric, describes primary and replica shard roles, and offers practical guidance on alias usage, shard sizing, replica settings, and performance optimizations to ensure cluster stability.

ElasticsearchPerformanceSharding

0 likes · 20 min read

Understanding Elasticsearch Indexes, Mappings, and Shard Architecture

Python Programming Learning Circle

Feb 27, 2024 · Fundamentals

Drawing Terrain Maps with Python Using rasterio, geopandas, and cartopy

This article demonstrates how to create detailed terrain maps in Python by installing and importing rasterio, geopandas, cartopy, and related libraries, configuring map fonts, and executing a comprehensive script that reads vector and raster data, applies custom color maps, and renders the final visualization.

CartopyData Visualizationgeopandas

0 likes · 4 min read

Drawing Terrain Maps with Python Using rasterio, geopandas, and cartopy

Amap Tech

Feb 5, 2024 · Artificial Intelligence

Gaode Tech 2023 Highlights: 15 Popular Articles on AI, Data, Mapping, and Navigation Technologies

Gaode Technology’s 2023 roundup showcases fifteen of its most-read articles, spanning AI infrastructure evolution, cloud‑native data optimization, BEV‑based perception, real‑time crowdsourced mapping, ETA prediction, lane‑level navigation, AR HUD, architecture design, low‑code platforms, and high‑performance Android testing.

AIBig DataData Engineering

0 likes · 9 min read

Gaode Tech 2023 Highlights: 15 Popular Articles on AI, Data, Mapping, and Navigation Technologies

Rare Earth Juejin Tech Community

Oct 22, 2023 · Frontend Development

Front‑End API Management Strategies Using Mapping Tables and Export Patterns

The article presents a front‑end API management approach that organizes CRUD functions into unified export statements, object‑oriented modules, and a central mapping table, demonstrating how these patterns improve code readability, maintainability, and development efficiency for large backend‑driven projects.

APIExportModule

0 likes · 11 min read

Front‑End API Management Strategies Using Mapping Tables and Export Patterns

Spring Full-Stack Practical Cases

Oct 22, 2023 · Databases

How to Supercharge Elasticsearch 7.8: Refresh, Replicas, Memory, and Query Tuning

This guide explains how to optimize Elasticsearch 7.8 performance by adjusting the refresh interval, replica count, JVM heap settings, bulk API usage, storage devices, mapping design, and query patterns, providing practical commands and visual examples for each step.

Bulk APIElasticsearchIndexing

0 likes · 8 min read

How to Supercharge Elasticsearch 7.8: Refresh, Replicas, Memory, and Query Tuning

DevOps Cloud Academy

Oct 17, 2022 · Backend Development

Preventing Mapping Explosion in Elasticsearch: Strategies and Examples

This article explains what mapping explosion is in Elasticsearch, why it hurts performance and memory, and presents three practical solutions—strict, false, and runtime dynamic settings—along with code examples and trade‑off discussions.

Dynamic MappingElasticsearchIndexing

0 likes · 8 min read

Preventing Mapping Explosion in Elasticsearch: Strategies and Examples

Python Programming Learning Circle

Aug 22, 2022 · Big Data

20 Data Visualization Tools: From Entry‑Level to Expert Solutions

This article surveys twenty data‑visualization tools—covering entry‑level options like Excel, online JavaScript libraries such as D3 and Google Chart API, interactive GUI utilities, map frameworks, advanced desktop environments, and expert‑grade platforms like R, Weka and Gephi—highlighting their key features, formats supported and typical use cases.

Big DataJavaScriptmapping

0 likes · 11 min read

20 Data Visualization Tools: From Entry‑Level to Expert Solutions

IT Services Circle

Mar 13, 2022 · Fundamentals

Using Folium for Interactive Map Visualization in Python

This article introduces the Python library Folium, explains its installation, demonstrates basic map creation, marker and shape addition, and presents a practical case of visualizing parking lot geolocation data with interactive features and clustering, providing code snippets and usage guidance.

Data VisualizationPythonWeb Mapping

0 likes · 12 min read

Using Folium for Interactive Map Visualization in Python

Qunar Tech Salon

Nov 24, 2021 · Databases

Comprehensive Guide to Elasticsearch Index Design, Settings, and Mapping

This article provides a detailed guide on Elasticsearch index design, covering index settings, shard and replica planning, mapping strategies, complex types, lifecycle management, template usage, and practical best‑practice recommendations for large‑scale log data clusters.

Big DataElasticsearchSearch Engine

0 likes · 27 min read

Comprehensive Guide to Elasticsearch Index Design, Settings, and Mapping

Spring Full-Stack Practical Cases

Aug 22, 2021 · Backend Development

Master Elasticsearch Index & Document Operations with RESTful APIs

This guide walks you through creating, viewing, updating, and deleting Elasticsearch indices, documents, and mappings using RESTful HTTP methods, complete with example requests, JSON bodies, and visual illustrations for each operation.

Document CRUDElasticsearchIndex Management

0 likes · 5 min read

Master Elasticsearch Index & Document Operations with RESTful APIs

Java Architecture Diary

Aug 18, 2021 · Frontend Development

Explore Grafana’s New Geomap Panel: Advanced Mapping Features & Customizations

This article introduces Grafana v8.1’s Geomap panel, detailing its multiple base‑layer options, enhanced custom markers, heatmap layer, flexible data‑layer mappings, and a new sharing feature that lets several map panels synchronize on a single dashboard.

DashboardGrafanaMonitoring

0 likes · 6 min read

Explore Grafana’s New Geomap Panel: Advanced Mapping Features & Customizations

Amap Tech

Jul 9, 2021 · Fundamentals

GPS Time Synchronization: Principles, Methods, and Applications in Mapping Vehicles

GPS‑based time synchronization aligns camera, LiDAR, and inertial sensor streams in mapping vehicles by using the satellite‑derived Pulse‑Per‑Second signal and NMEA data to correct the MCU’s clock, handle PPS‑crystal and PPS‑NMEA anomalies, and provide sub‑microsecond timestamps for precise sensor fusion.

GPSNMEAPPS

0 likes · 11 min read

GPS Time Synchronization: Principles, Methods, and Applications in Mapping Vehicles

Spring Full-Stack Practical Cases

Apr 26, 2021 · Databases

Master Elasticsearch Index & Document Operations with Simple REST Calls

This guide walks through using Elasticsearch 7.8.0 and Postman to create, view, update, and delete indices and documents via RESTful API calls, including mapping setup and query‑based deletions, providing clear code examples and request details.

Document CRUDElasticsearchIndex Management

0 likes · 5 min read

Master Elasticsearch Index & Document Operations with Simple REST Calls

360 Smart Cloud

Mar 19, 2021 · Databases

Introduction to Elasticsearch: Architecture, Core Concepts, and Common Operations

This article provides a comprehensive overview of Elasticsearch, covering its distributed architecture, fundamental concepts such as nodes, shards, and indices, as well as practical guidance on index design, bulk writing, query‑fetch workflow, scroll queries, aliases, and basic optimization tips.

DistributedElasticsearchIndexing

0 likes · 7 min read

Introduction to Elasticsearch: Architecture, Core Concepts, and Common Operations

Amap Tech

Mar 12, 2021 · Artificial Intelligence

High‑Precision Maps for Autonomous Driving: Production System and Technical Insights

Gaode’s high‑precision map platform, described by GM Xiang Zhe, details a three‑stage production pipeline, multi‑layer map architecture, and tiered data‑collection strategy that together address city‑road challenges, ensure map freshness, advance positioning and perception algorithms, and support commercial Level‑4 autonomous‑driving deployments.

autonomous drivingdata collectionhigh-precision map

0 likes · 11 min read

High‑Precision Maps for Autonomous Driving: Production System and Technical Insights

DevOps Cloud Academy

Nov 24, 2020 · Databases

Elasticsearch Interview Questions and Answers: Fundamentals, Architecture, and Operations

This article provides a detailed collection of basic Elasticsearch interview questions and answers, covering core concepts such as cluster and node architecture, indexing, mapping, search APIs, analyzers, tokenizers, aggregation, security, and operational tools, along with practical code snippets for common tasks.

AggregationElasticsearchIndexing

0 likes · 19 min read

Elasticsearch Interview Questions and Answers: Fundamentals, Architecture, and Operations

Java Architect Essentials

Oct 30, 2020 · Databases

Elasticsearch Essentials: Quick Start, Index Management, Mapping, and Advanced Operations

The article offers a thorough, step‑by‑step guide to Elasticsearch, explaining how to check cluster health, create and manage indices, define mappings and field types, use dynamic mapping, and perform maintenance tasks such as shrink, split, rollover, and cache management, all illustrated with concrete API examples.

ElasticsearchIndex ManagementSearch Engine

0 likes · 17 min read

Elasticsearch Essentials: Quick Start, Index Management, Mapping, and Advanced Operations

Amap Tech

Sep 24, 2020 · Artificial Intelligence

AR & Lane-Level Navigation Technology Evolution and Practice

In a 2020 Cloud Expo session, Alibaba Amap’s senior map expert Wang Qianwei detailed the evolution and practice of AR‑enabled lane‑level navigation, explaining how real‑time visual perception, cloud‑integrated high‑precision positioning (including MT‑SLAM) and fine‑grained 3‑D road models combine to deliver video‑augmented guidance, lane‑change alerts and traffic‑light status with roughly 30 cm accuracy.

AR navigationLane-Level NavigationSLAM

0 likes · 9 min read

AR & Lane-Level Navigation Technology Evolution and Practice

Amap Tech

Apr 24, 2020 · Artificial Intelligence

Q&A on Computer Vision Technologies and Their Applications in Mapping, Navigation, and Autonomous Driving

In a live Q&A, Alibaba Amap’s chief scientist Ren Xiaofeng explained how computer‑vision algorithms underpin high‑precision map creation, AR navigation, visual localization and sensor fusion, discussed current hardware limits, deep‑learning bottlenecks, 5G’s role, edge‑cloud cooperation, and offered career advice for transitioning researchers.

AIAR navigationautonomous driving

0 likes · 14 min read

Q&A on Computer Vision Technologies and Their Applications in Mapping, Navigation, and Autonomous Driving