Method for determination of an absolute volume of a stock pile on a construction site, comprising ▪ moving a mobile camera along a path around the stock pile while orienting the camera repeatedly, in particular continuously, onto the stock pile, ▪ in the course of this, capturing a series of images of the stock pile with the camera, the series comprising a plurality of images captured from different points on the path and with different orientations of the camera, the series being represented by an image data set collected thereby, ▪ performing a structure from motion evaluation with a defined algorithm using the series of images and generating a spatial representation (20, 46), particularly a point cloud, comprising a surface of the stock pile therefrom, ▪ scaling the spatial representation (20, 46) with help of given information about a known absolute reference regarding scale, ▪ defining a ground surface for the stock pile and applying it onto the spatial representation (20, 46) and ▪ calculating and outputting the absolute volume of the stock pile based on the scaled spatial representation (20, 46) and the defined ground surface, characterised in that ▪ a reference body, namely an elongated reference body, that defines a long axis due to its elongated shape and comprises at least two defined visually detectable markings, ∘ wherein at least two points are defined on the reference body, namely by the markings, and ∘ wherein an absolute distance in between the at least two points being known, is placed on or next to the stock pile of which the volume is to be determined before moving the camera and capturing the series of images, ▪ the series of images comprises a sub-group of images of the plurality of images, in which images of the sub-group the reference body - being placed on or next to the stock pile - is also captured, ▪ at least two spatial positions relative to the spatial representation (20, 46) are determined for the at least two points also based on the structure from motion evaluation, namely wherefore the sub-group of images is used, and ▪ the spatial representation (20, 46) is scaled based on a measured distance in between the determined at least two spatial positions and the known absolute distance in between the at least two points. ▪ moving a mobile camera along a path around the stock pile while orienting the camera repeatedly, in particular continuously, onto the stock pile, ▪ in the course of this, capturing a series of images of the stock pile with the camera, the series comprising a plurality of images captured from different points on the path and with different orientations of the camera, the series being represented by an image data set collected thereby, ▪ performing a structure from motion evaluation with a defined algorithm using the series of images and generating a spatial representation (20, 46), particularly a point cloud, comprising a surface of the stock pile therefrom, ▪ scaling the spatial representation (20, 46) with help of given information about a known absolute reference regarding scale, ▪ defining a ground surface for the stock pile and applying it onto the spatial representation (20, 46) and ▪ calculating and outputting the absolute volume of the stock pile based on the scaled spatial representation (20, 46) and the defined ground surface, ▪ a reference body, namely an elongated reference body, that defines a long axis due to its elongated shape and comprises at least two defined visually detectable markings, ∘ wherein at least two points are defined on the reference body, namely by the markings, and ∘ wherein an absolute distance in between the at least two points being known, is placed on or next to the stock pile of which the volume is to be determined before moving the camera and capturing the series of images, ∘ wherein at least two points are defined on the reference body, namely by the markings, and ∘ wherein an absolute distance in between the at least two points being known, ▪ the series of images comprises a sub-group of images of the plurality of images, in which images of the sub-group the reference body - being placed on or next to the stock pile - is also captured, ▪ at least two spatial positions relative to the spatial representation (20, 46) are determined for the at least two points also based on the structure from motion evaluation, namely wherefore the sub-group of images is used, and ▪ the spatial representation (20, 46) is scaled based on a measured distance in between the determined at least two spatial positions and the known absolute distance in between the at least two points.