This article explains the WKB binary format, its storage advantages in MySQL and PostgreSQL, and provides step‑by‑step Java code using JTS's GeometryFactory, WKBWriter, and WKBReader to write a Point to WKB, convert it to a hex string, and read it back into a geometry object.
The article analyzes the shortcomings of traditional offline advertising, proposes a data‑empowered omni‑channel marketing model that combines online consumer signals with spatial POI data, demonstrates its application with a case study, and outlines direct and indirect metrics for evaluating campaign effectiveness.
This tutorial walks you through reading Chinese GeoJSON files, converting projections, preparing scatter data, and creating a detailed map with an inset of the South China Sea using Python‑geopandas, Matplotlib, and custom legends, while also covering installation tips and known limitations.
This tutorial explains how to obtain geographic coordinates, store them as MySQL POLYGON types following OGC standards, insert campus area data, and query with spatial functions and SPATIAL indexes to determine whether a user is within a defined check‑in region.
This article explains how Baidu Maps’ reverse‑geocoding service converts coordinates into addresses using point, line, and polygon data mapped onto a grid index, describes the incremental indexing mechanism that enables rapid data updates, and highlights the system’s high availability and performance characteristics.
This article reviews map‑matching challenges, surveys algorithm categories, describes the ST‑Matching method and its implementation details, and presents experimental results using a large road network and GPS data to achieve high‑accuracy trajectory alignment.
