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OpenWeatherMap API is an open weather data service that provides global real-time weather, minute-level precipitation forecasts, 48-hour hourly forecasts, 8-day daily forecasts, national-scale weather alerts, and more than 40 years of historical weather data. Developers can access it with an API key and retrieve responses in JSON or XML format, then integrate it into websites, mobile applications, or IoT devices. This makes it suitable for location-based dynamic weather display and intelligent decision support. It is especially widely used in map platforms for visualizing weather layers and delivering real-time alerts to end users.

Zarr is a chunked, compressed N-dimensional array storage format designed for cloud-native workflows and high-performance computing. It splits large multidimensional scientific datasets, such as meteorological, remote sensing, and genomic data, into small independent chunks that are stored separately. Zarr supports multiple compression algorithms, including zstd and Blosc, and can be stored directly on local file systems, in ZIP archives, or in cloud object storage such as AWS S3. It natively supports parallel read/write access and lazy loading. Compared with NetCDF and HDF5, Zarr is better suited to large-scale data collaboration and distributed processing in cloud environments, and it has become one of the main backend formats for scientific computing tools such as xarray and Dask.

EPT (Entwine Point Tile) is a hierarchical spatial indexing format for large point cloud datasets, developed as part of the Entwine ecosystem. It organizes point cloud data into a tiled, octree-based structure so that clients can stream, query, and visualize only the portions they need. EPT is widely used for web-based point cloud delivery and visualization, especially for LiDAR and other large 3D geospatial datasets. Its main advantage is efficient access to massive point clouds without requiring the entire dataset to be loaded at once.

I3S, which stands for Indexed 3D Scene Layer, is an open 3D geospatial data standard led by Esri and adopted by the OGC (Open Geospatial Consortium). Its accompanying format, the Scene Layer Package (SLPK), packages all scene layer resources into a single archive file. Built on modern web technologies such as JSON and REST, it is adapted to cloud, web, and mobile environments, supporting efficient streaming, storage, and visualization of large-scale heterogeneous 3D data. It is compatible with multiple types of 3D content including 3D objects, oblique photogrammetry, point clouds, and BIM. It is now widely supported by major GIS software such as ArcGIS and ContextCapture.

OpenSCENARIO (.xosc) is a standardized XML format maintained by the ASAM (Association for Standardization of Automation and Measuring Systems) organization, specifically designed for describing dynamic scenarios in traffic simulation. It focuses on the behavioral interactions of traffic participants such as vehicles and pedestrians, and can reference static road network files such as OpenDRIVE. Through a hierarchical storyboard structure, it defines event trigger conditions and action sequences, serving as the core universal standard for achieving scenario reusability and cross-tool interoperability in the field of autonomous driving virtual testing.

Mapbox Schema API is a set of tools and specifications provided by Mapbox for defining and managing map data structures. It allows developers to describe map layers, data sources, and their style properties in a standardized manner, ensuring consistency of map data across different platforms and tools. It is commonly used for customizing map styles or precisely controlling the rendering rules of map elements when integrating geographic data.

GeoJSON API is not a standardized web service protocol but rather a geospatial data interchange format based on JSON. It is commonly used as the data carrier for geographic information system (GIS) data interfaces, transmitting geometric objects such as points, lines, and polygons along with their associated attributes. Its structure strictly adheres to the RFC 7946 specification and exclusively supports the WGS84 coordinate system. Typical objects include Feature (containing geometry and properties) and FeatureCollection. It is widely used for data loading and rendering in web mapping platforms such as Leaflet, Mapbox, and Tianditu (天地图). Developers can embed GeoJSON data directly via URL parameters for map visualization, or have backend services dynamically generate and return responses in this format.

Polar Stereographic (Elliptical) Projection is a conformal projection centered on the poles, formed by orthographically projecting the Earth's surface from the pole onto a plane. The meridians appear as radiating straight lines, and the parallels appear as concentric circles (or circular arcs). By employing elliptical parameters, it more accurately matches the Earth's ellipsoidal shape, maintaining relatively low distortion in polar regions. It is commonly used for polar map production and navigation.

Bertin 1953 Projection is an equal-area world map projection designed by French cartographer Jacques Bertin in 1953. Its core objective is to accurately represent the relative areas of countries and regions worldwide, making it particularly suitable for visualizing socio-economic data. The projection achieves strict area proportionality by highly compressing polar regions and deforming the entire Earth's surface into an approximately elliptical shape, with both meridians and parallels appearing as smooth curves. Although it does not preserve shape (non-conformal) or distance (non-equidistant), it maintains strict equal-area properties, achieving good overall visual balance and regional comparability. It remains one of the important non-traditional projections in modern thematic cartography.

Monte Mario (EPSG:4265) is Italy's official two-dimensional geographic coordinate system. Named after the Monte Mario datum and based on the International 1924 ellipsoid, it covers the entire territory of Italy (including San Marino and Vatican City). It is primarily used for geodetic surveying and offshore mineral management. Its coordinate axes are latitude and longitude, measured in degrees. It can be transformed to common coordinate systems such as WGS84 and ETRS89, with an accuracy of approximately 4 meters when transforming to WGS84.