GISBildverarbeitungssystemen

GISBildverarbeitung is a German term that translates to "GIS Image Processing." It refers to the techniques and technologies used to analyze, manipulate, and interpret raster data within the framework of a Geographic Information System (GIS). Raster data, unlike vector data which represents features as points, lines, or polygons, is organized as a grid of cells, where each cell has a specific value representing a characteristic of that location, such as elevation, temperature, or land cover.

GIS image processing encompasses a range of operations. These include geometric correction to align imagery with real-world coordinates, radiometric correction to adjust for variations in sensor response and atmospheric conditions, and classification to categorize pixels into thematic classes (e.g., forest, water, urban areas). Other common techniques involve image enhancement to improve visual interpretability, change detection to identify differences between images taken at different times, and feature extraction to derive specific information like road networks or building footprints.

The application of GIS image processing is vast. It is crucial for remote sensing, where satellite and aerial imagery is analyzed for environmental monitoring, agricultural assessment, urban planning, and disaster management. By integrating processed imagery with other geospatial data in a GIS, users can gain a comprehensive understanding of spatial phenomena and support informed decision-making. The underlying principle is to transform raw image data into meaningful geographic information that can be queried, analyzed, and visualized within a GIS environment.