Migrating from Leaflet to MapLibre: A Detective Story About 251 Routes

The article details the technical migration of a mapping service from the Leaflet library to MapLibre. The author explores the origin of a complex bug that required a deep dive into geodata processing and route rendering. The focus is on ensuring that 251 routes are displayed identically after switching to the new engine. The author shares debugging experiences, methods for verifying rendering accuracy 'byte-for-byte,' and overcoming challenges caused by differences in library architecture. This material is useful for developers working with Geographic Information Systems (GIS) who face the need to optimize or replace outdated map visualization tools. The article is not just a migration guide, but a full-fledged investigation demonstrating the importance of attention to detail when working with complex spatial data visualization.