Awesome GitHub RepositoriesLow Level Geospatial Libraries

Libvips is a C-based image processing library designed to manipulate large visual assets through a low-memory, parallel processing pipeline. It functions as a streaming image processor that avoids loading entire files into system memory, enabling the handling of massive images in resource-constrained environments. The library distinguishes itself through a demand-driven architecture that constructs a deferred execution plan, computing only the necessary pixels for a final output. By utilizing a cache-friendly tiled processing model and memory-mapped file access, it minimizes latency and redun

A command line toolkit to generate maps, point clouds, 3D models and DEMs from drone, balloon or kite images. 📷

H3 is an open-source library that provides a hierarchical hexagonal grid system for geospatial indexing. It projects the Earth onto an icosahedron and tiles each face with hexagons to minimize distortion, then encodes each hexagon as a 64-bit integer that stores its resolution and position in the hierarchy. This integer encoding enables fast bitwise operations for grid navigation and spatial analysis. The library offers a comprehensive set of grid topology algorithms for computing neighbor relationships, distances, and paths between cells directly on the hexagonal grid without geographic coor

Valhalla is an open-source routing engine that calculates optimal paths and travel times using OpenStreetMap data. It is built around a tiled routing graph framework, allowing map data to be organized into small geographic tiles for efficient regional updates and offline routing capability. The project distinguishes itself through a multimodal routing server that combines automobile, pedestrian, bicycle, and public transit modes into single journeys. It includes a GPS trace matching engine to align noisy coordinates to the most probable road network paths and an isochrone and matrix generator

Libpostal 是一个专为国际地址解析和标准化设计的 C 库。它利用统计自然语言处理（NLP）和语言分类器，将非结构化的全球地址字符串分解为结构化组件，并通过扩展缩写和解决跨语言的区域命名差异来标准化街道地址。 该项目提供文本转写工具，将各种脚本转换为标准化的拉丁-ASCII 或 NFD 形式。它还包括地址去重功能，使用对称模糊匹配来识别不同的地址记录是否指向同一个物理位置。 该库涵盖了更广泛的文本处理需求，例如 UTF-8 标准化，以及将书写数字和罗马数字转换为标准数字表示。它允许通过外部配置文件扩展地址识别功能，以添加新的语言和同义词。

本项目是一个跨平台地图 SDK 和硬件加速渲染引擎，使用 C++ 实现。它提供了一个共享的地理空间核心，允许将交互式地图嵌入到 Android、iOS、macOS、Node.js 和 Qt 应用程序中。 该系统专注于使用 OpenGL 和 GPU 原语进行高性能矢量瓦片渲染，以显示交互式 3D 地貌和复杂的地理空间数据集。它通过样式驱动的图层流水线将压缩的协议缓冲区 (Protocol Buffers) 转换为可自定义的视觉效果。 功能覆盖面扩展到全面的位置服务，包括地理编码、实时设备跟踪以及针对电动和传统车辆的复杂路线规划。它还涵盖了广泛的数据管理工具，用于瓦片集创建、空间分析以及具有无障碍验证功能的制图样式设计。 该项目包含一个命令行工具，用于为各种前端框架生成样板应用程序脚手架。

Tippecanoe is a command-line tool used to generate optimized vector tiles for web maps. It converts large-scale geospatial datasets, including GeoJSON, CSV, and Geobuf files, into binary vector tiles or MBTiles SQLite databases. The project is designed to maintain map performance and visual quality across different zoom levels. It achieves this through geospatial data downsampling, which includes simplifying geometries and thinning point density to prevent tile overcrowding and keep tile sizes within specific limits. The tool provides extensive data transformation capabilities, such as attri

Computational geometry and spatial indexing on the sphere

Vehicle Routing Open-source Optimization Machine

2D and 3D map renderer using OpenGL ES

C++ implementation of R*-tree, an MVR-tree and a TPR-tree with C API

You Only Look Twice: Rapid Multi-Scale Object Detection In Satellite Imagery

A command-line tool for converting heightmaps in GeoTIFF format into tiled optimized meshes.

Mapnik implemention of Mapbox Vector Tile specification

Entwine - point cloud organization for massive datasets

OpenOrienteering Mapper is a software for creating maps for the orienteering sport.

gSLICr: Real-time super-pixel segmentation

Indexes points and lines and generates map tiles to display them