Ground level calculation system

Abstract

To provide a technology for efficiently calculating height of an average ground surface.SOLUTION: A ground surface calculation system 1 is configured to: accept input of a position and height of a survey point and register them as three-dimensional coordinate data (S1); create a surface model of a target land from a group of points corresponding to the survey point (S2); set ground surface height estimation points for each predetermined span on the outline indicating the possible construction range for a building on the target land identified from a floor plan (S3, S4); then, superimpose a building outline on which the ground surface height estimation points are set on the surface model of the target land and identify the position of each ground surface height estimation point on the surface model (S5); estimate the height of each ground surface height estimation point from data interpolated for points between the survey points by creating the surface model (S6); and calculate the average GL for the building based on these results and define the highest height among the ground surface height estimation points as a design GL (S7).SELECTED DRAWING: Figure 3

Claims

1. A model creation unit that creates a surface model representing the surface of the target land from a point cloud corresponding to multiple 3D coordinates indicating survey points, A point setting unit sets multiple points, including points with unknown heights, on an outline indicating the area where a building can be constructed on the aforementioned land, A point height estimation unit that overlays the outline onto the surface model and estimates the height at the locations of the plurality of points based on the data interpolated by the surface model for the points between the survey points, A ground level height calculation unit that determines the design ground level height from the highest of the aforementioned multiple points and calculates the average ground level height for the building based on the heights of the aforementioned multiple points. A ground level calculation system equipped with the following features.

2. In the ground surface calculation system according to claim 1, The aforementioned point setting unit is The plurality of points are set at intervals corresponding to the span of the building. A ground surface calculation system characterized by the following features.

3. In the ground surface calculation system according to claim 1, The aforementioned ground surface height calculation unit is: If the difference in height between the building and the ground exceeds 3 meters, the average ground level height will be calculated for each part of the building where the height difference is within 3 meters. A ground surface calculation system characterized by the following features.

4. In the ground surface calculation system according to any one of claims 1 to 3, A survey information input unit that accepts input of at least the position and height of the survey point and registers it as 3D coordinate data. A ground level calculation system with additional features.

5. In the ground surface calculation system according to claim 4, A building height determination unit that determines the height of a building that can be constructed based on the average ground level, A site information acquisition unit that acquires site information including the aforementioned target land and map information of the surrounding area, A legal compliance check unit checks whether at least the height of the building conforms to the prescribed regulations relating to construction, based on the average ground level height and the design ground level height, as well as predetermined values ​​that can be identified from the information acquired by the site information acquisition unit. A ground level calculation system with additional features.

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