Aerial and/or satellite imagery-based, optical method for measuring physical impacts to land-based objects and/or structures by impact measurands in case of an occurrence of a natural catastrophe event, the natural catastrophe event impacting the land-based objects and/or structures causing a physical damage to the land-based objects and/or structures, comprising capturing by remote airborne sensors at least comprising infrared to visible multi-spectral sensors and/or synthetic aperture radar and/or hyperspectral sensors digital aerial and/or satellite imagery of an area affected by the natural catastrophe event and transmitting the digital aerial and/or satellite imagery to a digital ground system, characterized by the one or more airborne and/or space-based optical remote sensing devices being equipped with one or more optical remote sensors having a radiometric resolution given by the optical sensor's sensitivity to the magnitude of the electromagnetic energy or the optical sensor's measuring color depth at least comprises 8 bit giving at least 255 brightness levels, wherein the radiometric resolution defines the resolution of the system to detect differences in reflected or emitted energy, wherein spectral targets with known reflectance properties are placed in situ to calibrate the optical sensor measurements, and wherein very high spatial resolution orthophotos are generated by removing radiometric effects at least comprising vignetting and/or brightness variation from image-to-image and/or conversion to reflectance values, and geometric effects at least comprise lens distortion and/or relief displacement, generating, by a core engine of the digital ground system, a digital natural catastrophe event footprint of the natural catastrophe event based on the captured digital aerial and/or satellite imagery, the natural catastrophe event footprint at least comprising a topographical map of the natural catastrophe event, receiving, over a data transmission interface of the digital ground system, location parameter values defining land-based objects and/or structures located in or near the area affected by the natural catastrophe event, matching, by the core engine, the received location parameter values of each land-based objects and/or structure to the generated topographical map by identifying land-based objects and/or structure lying in the area affected by the natural catastrophe event, if the received location parameter values of a land-based objects and/or structure are detected to be in a geographic parameter value range of the topographical map, parametrizing, by an adaptive vulnerability curve structure, impact measurands for the land-based objects and/or structures per event intensity based on the measured topographical map, and measuring an impact measurand value for each of one or more of the land-based objects and/or structures based on an event intensity measured based on the natural catastrophe event footprint using the vulnerability curve structure. the one or more airborne and/or space-based optical remote sensing devices being equipped with one or more optical remote sensors having a radiometric resolution given by the optical sensor's sensitivity to the magnitude of the electromagnetic energy or the optical sensor's measuring color depth at least comprises 8 bit giving at least 255 brightness levels, wherein the radiometric resolution defines the resolution of the system to detect differences in reflected or emitted energy, wherein spectral targets with known reflectance properties are placed in situ to calibrate the optical sensor measurements, and wherein very high spatial resolution orthophotos are generated by removing radiometric effects at least comprising vignetting and/or brightness variation from image-to-image and/or conversion to reflectance values, and geometric effects at least comprise lens distortion and/or relief displacement, generating, by a core engine of the digital ground system, a digital natural catastrophe event footprint of the natural catastrophe event based on the captured digital aerial and/or satellite imagery, the natural catastrophe event footprint at least comprising a topographical map of the natural catastrophe event, receiving, over a data transmission interface of the digital ground system, location parameter values defining land-based objects and/or structures located in or near the area affected by the natural catastrophe event, matching, by the core engine, the received location parameter values of each land-based objects and/or structure to the generated topographical map by identifying land-based objects and/or structure lying in the area affected by the natural catastrophe event, if the received location parameter values of a land-based objects and/or structure are detected to be in a geographic parameter value range of the topographical map, parametrizing, by an adaptive vulnerability curve structure, impact measurands for the land-based objects and/or structures per event intensity based on the measured topographical map, and measuring an impact measurand value for each of one or more of the land-based objects and/or structures based on an event intensity measured based on the natural catastrophe event footprint using the vulnerability curve structure.