Beyond CoordinatesA personal blog about maps, graphics, software engineering, and the ideas that connect them.https://littlepotato.me/Why React Compiler Can Render Stale Data in MobX observer Componentshttps://littlepotato.me/posts/react-compiler-mobx-memoization/https://littlepotato.me/posts/react-compiler-mobx-memoization/A minimal reproduction of React Compiler caching stale JSX around MobX observer, why interior mutability conflicts with memoization, and the practical fixes available today.Mon, 13 Jul 2026 00:00:00 GMTWeb Gaussian Splatting: Cesium 3D Tiles vs. SparkJS 2.0https://littlepotato.me/posts/%E5%89%8D%E7%AB%AF%E9%AB%98%E6%96%AF%E6%B3%BC%E6%BA%85%E6%B8%B2%E6%9F%93%E6%96%B9%E6%A1%88%E5%AF%B9%E6%AF%94cesium-3d-tiles-vs-sparkjs-2-0/https://littlepotato.me/posts/%E5%89%8D%E7%AB%AF%E9%AB%98%E6%96%AF%E6%B3%BC%E6%BA%85%E6%B8%B2%E6%9F%93%E6%96%B9%E6%A1%88%E5%AF%B9%E6%AF%94cesium-3d-tiles-vs-sparkjs-2-0/A technical comparison of Cesium's standards-based 3D Tiles pipeline and SparkJS 2.0's renderer-native, paged Gaussian-splat runtime.Fri, 12 Jun 2026 01:38:58 GMTHow Mapbox Renders 3D Interchangeshttps://littlepotato.me/posts/mapbox-3d-intersections/https://littlepotato.me/posts/mapbox-3d-intersections/An analysis of Mapbox's lane-level HD road data, elevation features, styles, and rendering pipeline for 3D interchanges.Mon, 23 Jun 2025 08:48:29 GMTC++ Concurrency Study Noteshttps://littlepotato.me/posts/reading-cpp-concurrency/https://littlepotato.me/posts/reading-cpp-concurrency/A reading outline covering C++ concurrency, synchronization, atomics, parallel algorithms, and concurrent data structures.Wed, 19 Mar 2025 15:44:12 GMTQuadtrees and Collision Detectionhttps://littlepotato.me/posts/quadtree-and-collision-detection/https://littlepotato.me/posts/quadtree-and-collision-detection/Designing a quadtree for spatial partitioning, range queries, and collision detection, with implementation tradeoffs in C++.Mon, 10 Mar 2025 14:00:29 GMTWebAssembly Study Noteshttps://littlepotato.me/posts/webassembly-note/https://littlepotato.me/posts/webassembly-note/Notes on WebAssembly modules, memory, JavaScript interoperability, toolchains, performance, and browser execution.Wed, 05 Mar 2025 09:49:16 GMTUnderstanding C++ Rvalue References and std::movehttps://littlepotato.me/posts/rvalue-references-std-move/https://littlepotato.me/posts/rvalue-references-std-move/How rvalue references, std::move, and move semantics improve resource management in modern C++.Mon, 03 Mar 2025 14:28:26 GMTNotes on Natural Language Processinghttps://littlepotato.me/posts/reading-note-nlp/https://littlepotato.me/posts/reading-note-nlp/Books and an outline of notes on natural language processing.Sun, 02 Mar 2025 09:21:04 GMTPoor pigshttps://littlepotato.me/posts/poor-pigs/https://littlepotato.me/posts/poor-pigs/Aren't we all just poor pigs? Touch too many sensitive words, and you might not survive either.Sun, 02 Mar 2025 09:19:49 GMTPolygon Triangulation on a Sphere vs. a Planehttps://littlepotato.me/posts/polygon-triangulation-on-the-sphere/https://littlepotato.me/posts/polygon-triangulation-on-the-sphere/Why planar triangulation distorts polygons on a globe, and how subdivision and spherical interpolation improve the result.Fri, 28 Feb 2025 10:17:38 GMTHow Assuming the Earth Is Flat Speeds Up deck.gl Renderinghttps://littlepotato.me/posts/assuming-the-earth-is-flat-helps-speed-up-rendering-in-deck-gl/https://littlepotato.me/posts/assuming-the-earth-is-flat-helps-speed-up-rendering-in-deck-gl/How deck.gl balances Web Mercator projection cost and WebGL floating-point precision with an automatic offset coordinate system.Mon, 24 Feb 2025 08:00:58 GMTInteroperability Between C++ and JavaScript in V8https://littlepotato.me/posts/v8-%E5%BC%95%E6%93%8E%E4%B8%AD-c-%E5%92%8C-js-%E7%9A%84%E4%BA%A4%E4%BA%92/https://littlepotato.me/posts/v8-%E5%BC%95%E6%93%8E%E4%B8%AD-c-%E5%92%8C-js-%E7%9A%84%E4%BA%A4%E4%BA%92/How V8 maps values, exposes C++ variables, functions, and classes to JavaScript, and invokes JavaScript callbacks from C++.Mon, 24 Feb 2025 07:58:16 GMTAdvanced Thread Safety in C++https://littlepotato.me/posts/advanced-thread-safety-in-cpp/https://littlepotato.me/posts/advanced-thread-safety-in-cpp/Advanced techniques for protecting shared state in C++, including mutex discipline, deadlock avoidance, and thread-safe object design.Sat, 22 Feb 2025 11:48:50 GMTSpatial Search Algorithms: Querying Millions of Points Instantlyhttps://littlepotato.me/posts/spatial-search-algorithms/https://littlepotato.me/posts/spatial-search-algorithms/A practical comparison of spatial indexing strategies for efficient point and geometry queries at large scale.Tue, 18 Feb 2025 14:35:39 GMTC++20: Building a Thread Pool with Coroutineshttps://littlepotato.me/posts/building-a-thread-pool-with-coroutines/https://littlepotato.me/posts/building-a-thread-pool-with-coroutines/A minimal thread-pool implementation based on cppcoro concepts, designed to explain the essential mechanics of C++20 coroutines.Tue, 18 Feb 2025 14:34:49 GMTRunning a Web Crawler on a Cloud Serverhttps://littlepotato.me/posts/cloud-server-web-crawler/https://littlepotato.me/posts/cloud-server-web-crawler/Notes on moving a multithreaded web-crawling and upload workload to Google Cloud Platform.Tue, 18 Feb 2025 14:33:48 GMTPublishing Mapbox-Compatible Vector Tiles with GeoServerhttps://littlepotato.me/posts/publish-mapbox-tile-by-geoserver/https://littlepotato.me/posts/publish-mapbox-tile-by-geoserver/A practical walkthrough for publishing a Mapbox-compatible vector tile service with GeoServer.Tue, 18 Feb 2025 14:32:47 GMTThe Lifecycle of a Mapbox Vector Tilehttps://littlepotato.me/posts/mapbox-life-of-a-tile/https://littlepotato.me/posts/mapbox-life-of-a-tile/How Mapbox GL JS requests, parses, prepares, uploads, and renders vector tiles across the event loop, workers, and render loop.Tue, 18 Feb 2025 14:31:16 GMTThree.js Study Noteshttps://littlepotato.me/posts/reading-note-three-js/https://littlepotato.me/posts/reading-note-three-js/Study notes on Three.js.Tue, 18 Feb 2025 12:34:55 GMTC++ Study Noteshttps://littlepotato.me/posts/reading-note-cpp/https://littlepotato.me/posts/reading-note-cpp/Study notes on C++.Tue, 18 Feb 2025 12:34:32 GMTImplementing Building Shadows in Mapboxhttps://littlepotato.me/posts/mapbox-building-shadow/https://littlepotato.me/posts/mapbox-building-shadow/Implementing time- and location-based building shadows in Mapbox by adapting Threebox to Mapbox GL JS v2.Tue, 18 Feb 2025 12:25:36 GMTUnderstanding std::string_viewhttps://littlepotato.me/posts/string-view/https://littlepotato.me/posts/string-view/Using std::string_view for allocation-free string access while avoiding lifetime, ownership, and null-termination pitfalls.Mon, 10 Feb 2025 14:07:56 GMTWebGL Study Noteshttps://littlepotato.me/posts/reading-note-webgl/https://littlepotato.me/posts/reading-note-webgl/Study notes based primarily on WebGL Fundamentals.Tue, 04 Feb 2025 14:05:04 GMTDesigning a Cultural Revolution-era Maphttps://littlepotato.me/posts/design-a-cultural-revolution-style-map/https://littlepotato.me/posts/design-a-cultural-revolution-style-map/A cartographic experiment combining historical Beijing street names with period-inspired typography, colors, symbols, and map styling.Tue, 04 Feb 2025 13:40:24 GMTVisualizing Train Operations at Shanghai Hongqiao Railway Stationhttps://littlepotato.me/posts/shanghai-hongqiao-railway-station-data-visualization/https://littlepotato.me/posts/shanghai-hongqiao-railway-station-data-visualization/A map-based visualization of individual trains, cars, platforms, and routes around Shanghai Hongqiao Railway Station.Tue, 03 Jan 2023 10:05:47 GMTGenerating 3D Road Interchanges from OSM Datahttps://littlepotato.me/posts/build-3d-intersection-by-osm-data/https://littlepotato.me/posts/build-3d-intersection-by-osm-data/Using OSM layer ordering, slope constraints, and linear programming to infer road elevations for 3D interchanges.Tue, 03 Jan 2023 10:02:43 GMTImplementing Kriging Interpolation, Part 1: The Mathematicshttps://littlepotato.me/posts/how-kriging-works-1-formula/https://littlepotato.me/posts/how-kriging-works-1-formula/The semivariogram, model fitting, covariance matrix, and weighted estimation behind ordinary kriging.Tue, 03 Jan 2023 09:58:08 GMTImplementing Kriging Interpolation, Part 2: C# Implementationhttps://littlepotato.me/posts/how-kriging-works-2-programming/https://littlepotato.me/posts/how-kriging-works-2-programming/Implementing kriging interpolation in C# with Math.NET, semivariogram fitting, and matrix operations.Tue, 03 Jan 2023 09:57:57 GMTA Simple Way to Correct Raster Map Offsets in Chinahttps://littlepotato.me/posts/simple-way-to-correct-map-coordinate-deviation-in-china/https://littlepotato.me/posts/simple-way-to-correct-map-coordinate-deviation-in-china/Approximately correcting GCJ-offset raster tiles by transforming the requested tile extent before retrieving imagery.Tue, 03 Jan 2023 09:57:46 GMTSEO Study Noteshttps://littlepotato.me/posts/reading-note-seo/https://littlepotato.me/posts/reading-note-seo/Notes on crawling, indexing, ranking signals, site structure, content quality, and search-engine optimization.Tue, 03 Jan 2023 09:57:37 GMTInformation Retrieval Study Noteshttps://littlepotato.me/posts/reading-note-information-retrieval/https://littlepotato.me/posts/reading-note-information-retrieval/An outline of core information-retrieval concepts, from inverted indexes and ranking to clustering and evaluation.Tue, 03 Jan 2023 09:57:29 GMTSEO, Search Engines, and Search Quality Ratinghttps://littlepotato.me/posts/seo-and-search-engine-and-quality-rating/https://littlepotato.me/posts/seo-and-search-engine-and-quality-rating/Designing an effective relevance-labeling platform and what its workflow reveals about search ranking and quality evaluation.Tue, 03 Jan 2023 09:57:21 GMTWord Segmentation Algorithms and a Simple Implementation, Part 1https://littlepotato.me/posts/principle-of-word-segmentation-1/https://littlepotato.me/posts/principle-of-word-segmentation-1/How MMSEG and Jieba combine dictionaries, DAGs, dynamic programming, and HMMs for Chinese word segmentation.Tue, 03 Jan 2023 09:57:12 GMTWord Segmentation Algorithms and a Simple Implementation, Part 2https://littlepotato.me/posts/principle-of-word-segmentation-2/https://littlepotato.me/posts/principle-of-word-segmentation-2/A closer look at the algorithms behind Jieba and other Chinese word-segmentation systems.Tue, 03 Jan 2023 09:57:03 GMTAlgorithm Notes by Problem Typehttps://littlepotato.me/posts/algorithm-notes/https://littlepotato.me/posts/algorithm-notes/Study notes organized by categories of algorithmic problems.Tue, 03 Jan 2023 09:56:38 GMTAlgorithm Notes: Arrayshttps://littlepotato.me/posts/algorithm-note-array/https://littlepotato.me/posts/algorithm-note-array/Patterns for array problems, including numeric operations, two pointers, traversal, and in-place transformations.Tue, 03 Jan 2023 09:56:22 GMTAlgorithm Notes: Dynamic Programminghttps://littlepotato.me/posts/algorithm-note-dynamic-programing/https://littlepotato.me/posts/algorithm-note-dynamic-programing/Recognizing dynamic-programming problems and deriving optimal subproblems, state transitions, and common solution patterns.Tue, 03 Jan 2023 09:56:09 GMTAlgorithm Notes: Treeshttps://littlepotato.me/posts/algorithm-note-tree/https://littlepotato.me/posts/algorithm-note-tree/Tree construction, traversal, search, binary search trees, tries, and common interview problem patterns.Tue, 03 Jan 2023 09:54:03 GMTWhat Calculator Percent Keys Teach Ushttps://littlepotato.me/posts/the-old-new-thing-calculator/https://littlepotato.me/posts/the-old-new-thing-calculator/Why pocket calculators interpret percentages unexpectedly, and how to model that behavior with the shunting-yard algorithm and RPN.Tue, 03 Jan 2023 09:53:31 GMTUsing an eSIM in Mainland Chinahttps://littlepotato.me/posts/%E5%9C%A8%E5%9B%BD%E5%86%85%E4%BD%BF%E7%94%A8-esim-%E5%8D%A1%E8%BF%87%E7%A8%8B%E8%AE%B0%E5%BD%95/https://littlepotato.me/posts/%E5%9C%A8%E5%9B%BD%E5%86%85%E4%BD%BF%E7%94%A8-esim-%E5%8D%A1%E8%BF%87%E7%A8%8B%E8%AE%B0%E5%BD%95/A practical record of purchasing, activating, and testing a travel eSIM in mainland China.Tue, 03 Jan 2023 09:51:38 GMTClient-side Raster Tile Reprojectionhttps://littlepotato.me/posts/raster-reprojection/https://littlepotato.me/posts/raster-reprojection/Reprojecting non-Mercator WMTS raster tiles in the browser for display on a Web Mercator map.Tue, 03 Jan 2023 09:48:50 GMTImplementing Polygon Gradient Fillshttps://littlepotato.me/posts/polygon-gradient/https://littlepotato.me/posts/polygon-gradient/Using a polygon straight skeleton to implement an inward glow or shadow similar to QGIS shapeburst fills.Tue, 03 Jan 2023 09:47:31 GMT