Device, method, and system for processing survey data, and program therefor

A survey data processing method that uses image data of aerial photographic images obtained from an aerial vehicle that is flying, the aerial vehicle mounted with an inertial navigation unit and a first GNSS location identifying unit for identifying location by using a GNSS, the method comprising:

• receiving image data of aerial photographic images obtained by photographing a vehicle from the aerial vehicle, the vehicle configured to travel on a ground and equipped with a second GNSS location identifying unit and an identification marker for distinguishing the vehicle, the second GNSS location identifying unit configured to identify location by using a GNSS;
• receiving location data of the vehicle that is obtained by the second GNSS location identifying unit;
• detecting the identification marker of the vehicle in the image data;
• identifying the vehicle in the aerial photographic images by using the identification marker;
• identifying location of the identification marker on a basis of by using the location data of the vehicle and identification information obtained by identifying the vehicle;
• acquiring two or more aerial photographic images from among the image data, the two or more aerial photographic images being obtained from the aerial vehicle that is flying, at different viewpoints, and containing the same area;
• acquiring the identification marker from each of the acquired two or more aerial photographic images;
• calculating location of the identification marker that is acquired from each of the acquired two or more aerial photographic images, by a method of intersection;
• and
• comparing the calculated location of the identification marker with location of the identification marker that is identified by the second GNSS location identifying unit.

A non-transitory computer recording medium storing computer executable instructions for executing the following processing by using image data of aerial photographic images that are obtained from an aerial vehicle that is flying, the aerial vehicle mounted with an inertial navigation unit and a first GNSS location identifying unit for identifying location by using a GNSS, the computer executable instructions made to, when executed by a computer processor, cause the computer processor to:

• receive image data of aerial photographic images obtained by photographing a vehicle from the aerial vehicle, the vehicle configured to travel on a ground and equipped with a second GNSS location identifying unit and an identification marker for distinguishing the vehicle, the second GNSS location identifying unit configured to identify location by using a GNSS;
• receive location data of the vehicle that is obtained by the second GNSS location identifying unit;
• detect the identification marker of the vehicle in the image data;
• identify the vehicle in the aerial photographic images by using the identification marker;
• identify location of the identification marker on a basis of the location data of the vehicle and identification information obtained by identifying the vehicle;
• acquiring two or more aerial photographic images from among the image data, the two or more aerial photographic images being obtained from the aerial vehicle that is flying, at different viewpoints, and containing the same area;
• acquiring the identification marker from each of the acquired two or more aerial photographic images;
• calculating location of the identification marker that is acquired from each of the acquired two or more aerial photographic images, by a method of intersection;
• and
• comparing the calculated location of the identification marker with location of the identification marker that is identified by the second GNSS location identifying unit.