Höjdfält

Höjdfält is a term originating from Swedish, often translated as "height field" or "elevation map" in English. It refers to a data structure used in computer graphics and geographic information systems to represent the topography of a surface. Essentially, a höjdfält is a grid where each cell contains a value indicating the height or elevation at that specific point. This allows for the digital representation and manipulation of terrains, landscapes, and other three-dimensional surfaces.

The data within a höjdfält is typically organized in a two-dimensional array. The position of an element in the array corresponds to its X and Y coordinates on the ground plane, while the value stored at that position represents the Z coordinate, or height. This simple yet effective structure makes it computationally efficient to store, access, and process elevation data. Common applications include video game development for creating realistic environments, scientific simulations for analyzing geological formations, and urban planning for understanding land contours.

Generating or acquiring a höjdfält can be done through various methods. This includes using digital elevation models (DEMs) derived from satellite imagery, LiDAR scans, or photogrammetry. Alternatively, artists and designers can manually create höjdfält data using specialized software. The resolution of the höjdfält, meaning the spacing between grid points, determines the level of detail that can be represented. Higher resolutions result in more detailed terrain but require more storage and processing power.