rastervälja

Rastervälja is a Swedish term that translates to "raster field" or "raster data" in English. It refers to a type of digital geographic data that represents the world as a grid of cells, also known as pixels. Each cell in the grid has a specific value that corresponds to a particular characteristic of the land surface or a phenomenon at that location. These values can represent a variety of information, such as elevation, temperature, land cover type, or the presence of a specific pollutant.

The resolution of raster data, which is the size of each cell, is a crucial factor determining the level of detail in the representation. Higher resolution means smaller cells and therefore a more detailed depiction of the area. Lower resolution means larger cells and a more generalized representation. Raster data is commonly used in geographic information systems (GIS) for tasks like environmental modeling, satellite image analysis, and topographic mapping. It is generated from various sources, including satellite imagery, aerial photography, and digital elevation models. Processing raster data often involves techniques such as reclassification, spatial analysis, and resampling to manipulate and derive new information from the grid.