GeoJSONtiedostoille

GeoJSONtiedostoille is a term that refers to files formatted using the GeoJSON specification. GeoJSON is a lightweight format for encoding a variety of geographic data structures and their non-spatial attributes. It is based on the JavaScript Object Notation (JSON) format. GeoJSON is commonly used for transmitting and storing geographic data, such as points, lines, polygons, and collections of these features, especially on the web.

A GeoJSON file represents a geographical feature. The core components of a GeoJSON object are its "type" and "geometry". The "type" can be a "Point", "MultiPoint", "LineString", "MultiLineString", "Polygon", "MultiPolygon", "GeometryCollection", or "FeatureCollection". The "geometry" member describes the shape of a geographic feature. Each geometry type has a specific structure for representing coordinates. For example, a "Point" geometry consists of a single coordinate pair. A "Polygon" geometry is defined by an array of linear ring coordinate arrays.

In addition to geometry, GeoJSON objects can also include "properties". These are key-value pairs that store non-spatial attributes associated with the geographic feature. For instance, a point representing a city might have properties like "name", "population", or "country". A "Feature" object in GeoJSON combines a geometry with its properties. A "FeatureCollection" is a collection of multiple "Feature" objects. This format makes it easy to integrate geographic data with web applications and services.