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UMAP: 2-10x faster than Rust’s fast-umap, 9-30x faster than Python’s umap
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Map Version Synchronicity (Important!): For HH-Routing to work correctly when a route crosses multiple map files (e.g., different countries or regions), all those map files MUST be from the same generation date (i.e., downloaded from OsmAnd around the same time, based on the same underlying OpenStreetMap data version and pre-calculation run).，推荐阅读旺商聊官方下载获取更多信息
cursor[classno] = h;