Convert GeoJSON to PMTiles
Use this tool to convert GeoJSON to PMTiles with various options such as Geometry Type, Projections, Line separator, etc.
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What is GeoJSON?
GeoJSON, short for "Geographic JavaScript Object Notation", is an open standard format for encoding geographic data structures. It is based on the JSON (JavaScript Object Notation) format and is commonly used for representing geographical features, such as points, lines, polygons, and their associated properties.
Key aspects of GeoJSON include:
- Geometry Types: GeoJSON supports various geometry types, including Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection. These geometries describe different spatial features like points, lines, and polygons.
- Feature Objects: A GeoJSON Feature object represents a spatially bounded entity along with its properties. It consists of a geometry and an optional set of properties. Features can represent various geographic entities such as cities, rivers, or countries.
- Feature Collection: A GeoJSON Feature Collection is a container for multiple Feature objects. It allows grouping multiple features into a single object.
- Coordinate Reference System (CRS): GeoJSON supports the use of both geographic and projected coordinate reference systems. The default CRS is WGS84 (EPSG:4326), which uses longitude and latitude coordinates. Alternative coordinate reference systems can be specified using the "crs" member.
- Properties: GeoJSON allows the inclusion of additional properties alongside geometries. These properties can be any JSON value and provide metadata or attributes associated with the spatial features.
- Simple and Lightweight: GeoJSON is designed to be easy to read and write for both humans and machines. It is a lightweight format suitable for transmitting geographic data over the web.
- Interoperability: GeoJSON is widely supported by various GIS software, libraries, and web mapping frameworks, making it a popular choice for exchanging geographic data between different systems.
Overall, GeoJSON provides a simple and versatile format for representing geographic data, making it well-suited for a wide range of applications, including web mapping, data visualization, and spatial analysis.
What is PMTiles?
A PMTiles (Portable Map Tiles) file is a format for storing map tiles in a single file, making it easier to distribute and use maps offline or in environments with limited connectivity. It's a self-contained package that includes all the necessary tiles and metadata for rendering a map.
Here's a breakdown of what a PMTiles file typically contains:
- Map Tiles: PMTiles files store pre-rendered map tiles at various zoom levels and tile coordinates. These tiles are usually in standard web mapping formats like PNG or JPEG.
- Metadata: PMTiles files often include metadata describing the map, such as its name, description, attribution, and bounds.
- Tile Structure: The tiles are organized in a hierarchical structure based on zoom levels and tile coordinates. This structure allows efficient retrieval of tiles for rendering maps at different zoom levels and locations.
- Tile Index: PMTiles files may include an index or directory structure that allows quick lookup of tiles based on their zoom levels and coordinates.
- Compression: To reduce file size, PMTiles files may use compression techniques such as gzip or deflate.
- Compatibility: PMTiles files are designed to be compatible with various mapping libraries and applications that support tiled maps, such as OpenLayers, Leaflet, and Mapbox GL.
Overall, PMTiles files provide a convenient way to package and distribute map tiles, making it easier to deploy maps in offline or resource-constrained environments. They are commonly used for mobile applications, offline mapping, and sharing custom map styles and data.