Method of creating longitudinal section of three-dimensional point group data, and survey data processing device and survey system for the same

A survey data processing device for creating a longitudinal section from three dimensional point group data obtained from a survey, comprising:

• a memory;
• an input unit;
• a display, and
• a CPU including a three-dimensional point group data acquisition unit, an X-Y plane creation unit, a longitudinal section creation line setting unit, and a longitudinal section creation unit, wherein
• the three-dimensional point group data acquisition unit acquires three-dimensional point group data (X, Y, Z) from the memory that was generated by a surveying device including at least any one of a point group measuring device, a ground traveling body, and a flying body,
• the X-Y plane creation unit projects the three-dimensional point group data onto an X-Y plane and displays the X-Y plane on the display,
• the longitudinal section creation line setting unit sets a longitudinal section creation line from the input unit by sequentially designating a plurality of interval designation points limited to the X-Y plane, wherein an end point of a previous interval is set as a start point of a next interval such that the interval designation points define a plurality of intervals on the longitudinal section creation line, and
• the longitudinal section creation unit projects Z points between a start point and an end point for each interval onto a vertical virtual plane that includes the longitudinal section creation line;
• develops the resulting plurality of vertical virtual planes on a same one plane by matching end points of previous intervals with start points of next intervals, and displays the one plane on the display.

A survey system for creating a longitudinal section from three dimensional point group survey data, comprising:

• surveying equipment including at least any one of a point group measuring device, a ground traveling body, and a flying body that survey three-dimensional point group data (X, Y, Z) of terrain or a structure;
• and
• a survey data processing device that includes a memory, an input unit, a display, and a CPU that includes a three-dimensional point group data acquisition unit, an X-Y plane creation unit, a longitudinal section creation line setting unit, and a longitudinal section creation unit, wherein
• the three-dimensional point group data acquisition unit acquires three-dimensional point group data (X, Y, Z) generated by the surveying equipment,
• the X-Y plane creation unit projects the three-dimensional point group data onto an X-Y plane and displaying the X-Y plane on the display,
• the longitudinal section creation line setting unit sets a longitudinal section creation line from the input unit by sequentially designating a plurality of interval designation points limited to the X-Y plane, wherein an end point of a previous interval is set as a start point of a next interval such that the interval designation points defines a plurality of intervals on the longitudinal section creation line, and
• the longitudinal section creation unit projects Z points between a start point and an end point of each interval defined by the interval designation points onto a vertical virtual plane that includes the longitudinal section creation line and corresponds to (X, Y) coordinates of the longitudinal section creation line, and develops the resulting plurality of the virtual planes on a same one plane by matching end points of previous intervals with start points of next intervals, and displays the one same plane on the display.