världfil

Världfil, also known as the World File, is a file format used to store geospatial data and metadata. It is commonly associated with Esri's ArcGIS software, which is widely used in geographic information systems (GIS). The World File is a simple text file that contains information about the geographic transformation of a raster image, such as a satellite image or a scanned map. This transformation includes details like the pixel size and the coordinates of the image's origin.

The World File is typically named after the raster image it accompanies, with a corresponding extension. For example, if the raster image is named "image.tif," the World File would be named "image.tfw." The World File contains six lines of text, each representing a different piece of information:

1. Pixel size in the x-direction (width of a pixel).

2. Rotation about the y-axis.

3. Rotation about the x-axis.

4. Pixel size in the y-direction (height of a pixel).

5. X-coordinate of the center of the upper left pixel.

6. Y-coordinate of the center of the upper left pixel.

The World File allows GIS software to correctly display and analyze the raster image by providing the necessary georeferencing information. It is an essential component in the integration of raster data into GIS projects, enabling accurate spatial analysis and mapping.