Open-source alternatives to ARKit CoreLocation

gcoord is a coordinate conversion library that transforms geographic coordinates between China's three major map coordinate systems: WGS-84, GCJ-02, and BD-09. It handles the offset corrections required by national encryption policies, converting GPS or API-derived coordinates to align with the projections used by Chinese map providers like Baidu, Gaode, and Google China. The library provides direct conversions between all three systems, including WGS-84 to GCJ-02, WGS-84 to BD-09, GCJ-02 to BD-09, and their reverse transformations. It processes individual coordinate pairs, batches of coordin

The Android ARCore SDK is a software development kit and augmented reality framework used to create experiences on Android devices. It provides a collection of tools and native libraries for tracking device motion and mapping physical environments to place virtual objects in real space. The framework utilizes an environmental tracking API to detect physical planes and estimate ambient lighting, which blends digital content with the real world. It includes systems for fixing virtual content to specific physical locations to maintain spatial stability as a user moves through an environment. Th

coordtransform is a coordinate transformation library and map projection utility used to convert geographic coordinates between WGS84, GCJ02, and BD09 systems. It functions as a geographic coordinate converter that transforms longitude and latitude values to align map data across different providers. The library specifically handles the shifts and offsets required for Chinese map integration, ensuring that spatial data aligns correctly when moving coordinates between these international and regional mapping standards. Its capabilities cover GIS data alignment and location data normalization,

Gyroflow is a gyroscope video stabilization software and IMU telemetry processor designed to remove camera shake from video files. It functions as a hardware-accelerated video renderer and lens calibration tool, utilizing embedded or external gyroscope and accelerometer data to perform pixel-level stabilization. The system is distinguished by its ability to integrate with professional non-linear video editing software via plugins, allowing stabilization to be applied directly to timelines without transcoding original footage. It supports diverse telemetry ingestion from camera brands, flight

PLFM_RADAR is a phased array radar system designed for target detection and tracking at a 10.5 GHz operating frequency. It integrates an LFM waveform generator, a radar signal processor, and an electronic beam steer controller to function as a low-cost radar solution. The system differentiates itself through electronic beam steering, which uses phase shifters to adjust antenna elevation and azimuth without physical movement. It also incorporates a geospatial target tracker that fuses GPS and IMU sensor data to provide real-time position and attitude correction for plotting targets. The proje

Cesium is a JavaScript library designed for rendering high-precision 3D globes and 2D maps within web browsers. It functions as a visualization engine that leverages hardware-accelerated graphics to display complex geographic data, terrain, and imagery. The library distinguishes itself through a modular architecture that supports the streaming of massive geographic datasets. By employing tiled data delivery and hierarchical level-of-detail optimization, it maintains performance while navigating large-scale environments. It also includes a time-dynamic state management system, which synchroniz

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