1.3.2 Data Quality Verification

💡 The accuracy of data is important for using analysis data for surveying, earthwork volume calculation, etc. using drone data. The following are methods to verify the error between the analyzed data and the actual coordinates.

Check it easily on the platform

• Select the GCP checkbox in the upper right corner to check for any anomalies in the GCPs on the orthoimage.

  

• Use the map tool to check the error between the GCP coordinates.

  

  

• Check if the 3D Point cloud data is implemented.

  • If there are anomalies in the Point Cloud
    • For example, point clouds may appear at the bottom of the point cloud
    • Problems such as rotation of the X and Y axes may occur.

  

  

• If there is previous orthoimage data for the site, use the time series change monitoring function to check the accuracy.

  

Check it using the analysis report.

• Click the download button in the upper right corner of the platform.

  

• Click the report in the lower right corner, then click the Pix4D report. (This function is only available for analysis using the Pix4D analysis engine.)

  

• Check the analysis accuracy and GCP error rate items in the report.