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Coordinate Systems

7 articles · Page 1 of 1
Machine Learning Algorithms & Natural Language Processing
Machine Learning Algorithms & Natural Language Processing
Sep 9, 2026 · Artificial Intelligence

S-Space: Inside Multimodal Models' Internal 3D Map and Its Reasoning Failures

Researchers discover S-Space, a stable low-dimensional spatial workspace in multimodal models that encodes object positions, but models confuse coordinate systems and fail to reliably rotate spatial representations, revealing a gap between having spatial representations and using them for reasoning.

Coordinate SystemsGPT-6 AstraQwen
0 likes · 15 min read
S-Space: Inside Multimodal Models' Internal 3D Map and Its Reasoning Failures
Xiaolin Talks Programming
Xiaolin Talks Programming
Sep 2, 2026 · Backend Development

Spring Boot Redis Geo: Nearby Stores & Geofencing – Pitfalls, Optimizations & Production Patterns

A hands-on guide to replacing MySQL spatial queries with Redis Geo for nearby-store search and geofencing, covering Spring Boot integration, GeoHash internals, coordinate-system pitfalls, pagination strategies, cluster key design, and real-world performance numbers from a 5,000-store convenience-chain deployment.

Coordinate SystemsGeoHashGeofencing
0 likes · 20 min read
Spring Boot Redis Geo: Nearby Stores & Geofencing – Pitfalls, Optimizations & Production Patterns
ELab Team
ELab Team
Jan 30, 2023 · Fundamentals

Understanding Map Projections: From Geographic to Web Mercator and Tile Services

This article explains the fundamentals of geographic and projected coordinate systems, details the Mercator and Web Mercator projections, introduces EPSG standards, discusses China's GCJ02 and BD09 offsets, and describes common GIS data services and tile‑based rendering techniques.

Coordinate SystemsGISMap Projections
0 likes · 19 min read
Understanding Map Projections: From Geographic to Web Mercator and Tile Services
Caiyun Tech Team
Caiyun Tech Team
Dec 30, 2022 · Fundamentals

Understanding Map Projections, Coordinate Systems, and Tile Generation

The article explains why flat maps require projections, compares conformal, equal‑area and equidistant methods, describes the WGS84 datum and the GCJ‑02 “Mars” offset, outlines modern Web Mercator tiling standards, and shows how Python libraries like mercantile, pygrib, xarray, GDAL and rasterio can be used to read gridded data and produce map tiles.

Coordinate SystemsGDALGIS
0 likes · 14 min read
Understanding Map Projections, Coordinate Systems, and Tile Generation
Amap Tech
Amap Tech
Oct 16, 2020 · Fundamentals

Fundamentals of High‑Precision Mapping and Coordinate Systems

The article explains high‑precision mapping fundamentals, from Earth’s ellipsoid and geoid definitions and common datums to 2‑D map projections, then details vehicle‑centred and sensor coordinate frames (ECEF, ENU, body, LiDAR, IMU, camera), their transformations, rotation representations, and key standards such as EPSG and Proj.4.

Coordinate SystemsECEFGIS
0 likes · 13 min read
Fundamentals of High‑Precision Mapping and Coordinate Systems
Tongcheng Travel Technology Center
Tongcheng Travel Technology Center
Mar 20, 2018 · Mobile Development

Implementing an AR Hotel Finder with ARKit: Coordinate Systems, Transformations, and Navigation

This article details the design and implementation of an ARKit‑based hotel‑finding application for iOS, covering coordinate system concepts, conversion pipelines, elevation handling, directional hints, radar visualization, navigation routing, map/AR switching, and real‑time navigation alerts, accompanied by sample Objective‑C code.

ARARKitCoordinate Systems
0 likes · 14 min read
Implementing an AR Hotel Finder with ARKit: Coordinate Systems, Transformations, and Navigation