Japanese Laser Drone "mapryM4" Releases High-Precision Verification Results Compliant with Construction Management Guidelines
Mapry announced that its self-developed Japanese-made laser drone "mapryM4" has demonstrated high-precision 3D point cloud data acquisition compliant with the Ministry of Land, Infrastructure, Transport and Tourism's "Construction Management Guidelines using 3D Measurement Technology" (within ±50mm). By using "Helmert transformation," it cleared the required accuracy on all axes, including verification at an altitude of 50m, which is frequently used in practice. This proves its high security performance unique to Japanese-made aircraft and the strict accuracy required in public surveying and civil engineering sites.
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- 📰 Published: May 12, 2026 at 18:30
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Mapry (Headquarters: Tanba City, Hyogo Prefecture, Representative Director: Keiji Yamaguchi, hereinafter Mapry) has conducted and released the results of coordinate accuracy verification for 3D point clouds, demonstrating that its self-developed Japanese-made laser drone "mapryM4" (hereinafter M4) complies with the standards (within ±50mm) of the "Construction Management Guidelines using 3D Measurement Technology" set by the Ministry of Land, Infrastructure, Transport and Tourism.
By using "Helmert transformation (coordinate correction using 3 or more control points)," the required accuracy was cleared on all axes, including verification at an altitude of 50m, which is frequently used in practice. This demonstrated that it achieves both high security performance unique to Japanese-made aircraft and the strict accuracy required in public surveying and civil engineering sites.
Background and Challenges
Currently, in the construction and civil engineering industries, point cloud measurement using drones has become standardized due to the promotion of i-Construction. Especially in public works, there is a simultaneous demand to comply with "security standards (Japanese-made aircraft)" to suppress the risk of data outflow overseas, and to clear the strict accuracy standard of "horizontal and vertical error within ±50mm" stipulated by the Construction Management Guidelines.
To meet these needs, Mapry leveraged its strength in developing both hardware and software in-house and conducted accuracy verification tailored to practical use.
Solution and Verification Data by M4
Accuracy verification was conducted at control points around the company building, varying the flight altitude. The RMSE (accuracy) data after applying "Helmert transformation" using ground control points is as follows:
[Accuracy Verification Results by Flight Altitude (after applying Helmert transformation)]
Flight Altitude | XY-axis (Horizontal) RMSE | Z-axis (Vertical) RMSE
---|---|---
30m Altitude | 34.6 mm | 30.8 mm
50m Altitude | 30.3 mm | 14.7 mm
*Ministry of Land, Infrastructure, Transport and Tourism Construction Management Guidelines Target Accuracy: Horizontal and vertical both within ±50mm
Strengths of "M4" Solution for Surveying and Civil Engineering
1. "Japanese-made" Reliability that Clears Security Requirements for Public Works
"M4" is an integrated Japanese-made drone model with consistently optimized airframe, sensors, and applications domestically.
Compliance with government standards: Adopts communication modules compliant with the US National Defense Authorization Act (NDAA), thoroughly eliminating the risk of data outflow overseas. It can be safely introduced in critical infrastructure and public works.
Strong encryption: AES-256 encrypted communication prevents eavesdropping and hijacking by third parties. It smoothly handles projects designated for Japanese-made aircraft.
2. Advanced "Coordinate Transformation" Function Specialized for Surveying and Civil Engineering
Optimal correction methods can be selected on the software according to site conditions and required accuracy.
3-point coordinate transformation (Helmert transformation): Matches public control points and point cloud data in millimeter units. As demonstrated in this verification, high-precision deliverables (comparison with DXF, etc.) compliant with the Construction Management Guidelines can be created.
1-point coordinate transformation (shift correction): Allows quick alignment with on-site coordinates in locations where control points are difficult to install, or in simple surveying and earthwork volume measurement where speed is required.
3. Easy Operation with Linked Apps and Analysis Software
Complex piloting skills are not required, and anyone can acquire high-precision data using standard procedures.
Automatic flight route creation: Simply specify the range on a map screen on a tablet to automatically generate a flight route that matches the terrain undulations.
One-stop analysis: Acquired data is linked with analysis software to automatically generate DSM, DTM, and canopy height models. This significantly streamlines earthwork volume calculation, forest resource surveys, and drawing calculations required for subsidy applications.
For product information such as specifications, please visit the product page.
M4 Product Page: https://m4.mapry.co.jp/
Inquiries regarding this matter
For inquiries regarding the use of this function or partnership applications, please contact us below.
Inquiry Window: https://mapry.co.jp/contact/
About Mapry
Mapry is a service for everyone involved in surveying, forestry, disaster prevention, agriculture, and construction. It provides solutions that make it easy to acquire, analyze, and utilize 3D data, which previously had high hurdles due to surveying equipment costs and difficult equipment operation/analysis.
■Company Overview
Company Name: Mapry Co., Ltd.
Location: 165 Tada, Kasuga-cho, Tanba City, Hyogo Prefecture (Headquarters)
Representative: Keiji Yamaguchi, Representative Director
HP: https://mapry.co.jp/
Inquiries regarding this matter: info@mapry.co.jp
By using "Helmert transformation (coordinate correction using 3 or more control points)," the required accuracy was cleared on all axes, including verification at an altitude of 50m, which is frequently used in practice. This demonstrated that it achieves both high security performance unique to Japanese-made aircraft and the strict accuracy required in public surveying and civil engineering sites.
Background and Challenges
Currently, in the construction and civil engineering industries, point cloud measurement using drones has become standardized due to the promotion of i-Construction. Especially in public works, there is a simultaneous demand to comply with "security standards (Japanese-made aircraft)" to suppress the risk of data outflow overseas, and to clear the strict accuracy standard of "horizontal and vertical error within ±50mm" stipulated by the Construction Management Guidelines.
To meet these needs, Mapry leveraged its strength in developing both hardware and software in-house and conducted accuracy verification tailored to practical use.
Solution and Verification Data by M4
Accuracy verification was conducted at control points around the company building, varying the flight altitude. The RMSE (accuracy) data after applying "Helmert transformation" using ground control points is as follows:
[Accuracy Verification Results by Flight Altitude (after applying Helmert transformation)]
Flight Altitude | XY-axis (Horizontal) RMSE | Z-axis (Vertical) RMSE
---|---|---
30m Altitude | 34.6 mm | 30.8 mm
50m Altitude | 30.3 mm | 14.7 mm
*Ministry of Land, Infrastructure, Transport and Tourism Construction Management Guidelines Target Accuracy: Horizontal and vertical both within ±50mm
Strengths of "M4" Solution for Surveying and Civil Engineering
1. "Japanese-made" Reliability that Clears Security Requirements for Public Works
"M4" is an integrated Japanese-made drone model with consistently optimized airframe, sensors, and applications domestically.
Compliance with government standards: Adopts communication modules compliant with the US National Defense Authorization Act (NDAA), thoroughly eliminating the risk of data outflow overseas. It can be safely introduced in critical infrastructure and public works.
Strong encryption: AES-256 encrypted communication prevents eavesdropping and hijacking by third parties. It smoothly handles projects designated for Japanese-made aircraft.
2. Advanced "Coordinate Transformation" Function Specialized for Surveying and Civil Engineering
Optimal correction methods can be selected on the software according to site conditions and required accuracy.
3-point coordinate transformation (Helmert transformation): Matches public control points and point cloud data in millimeter units. As demonstrated in this verification, high-precision deliverables (comparison with DXF, etc.) compliant with the Construction Management Guidelines can be created.
1-point coordinate transformation (shift correction): Allows quick alignment with on-site coordinates in locations where control points are difficult to install, or in simple surveying and earthwork volume measurement where speed is required.
3. Easy Operation with Linked Apps and Analysis Software
Complex piloting skills are not required, and anyone can acquire high-precision data using standard procedures.
Automatic flight route creation: Simply specify the range on a map screen on a tablet to automatically generate a flight route that matches the terrain undulations.
One-stop analysis: Acquired data is linked with analysis software to automatically generate DSM, DTM, and canopy height models. This significantly streamlines earthwork volume calculation, forest resource surveys, and drawing calculations required for subsidy applications.
For product information such as specifications, please visit the product page.
M4 Product Page: https://m4.mapry.co.jp/
Inquiries regarding this matter
For inquiries regarding the use of this function or partnership applications, please contact us below.
Inquiry Window: https://mapry.co.jp/contact/
About Mapry
Mapry is a service for everyone involved in surveying, forestry, disaster prevention, agriculture, and construction. It provides solutions that make it easy to acquire, analyze, and utilize 3D data, which previously had high hurdles due to surveying equipment costs and difficult equipment operation/analysis.
■Company Overview
Company Name: Mapry Co., Ltd.
Location: 165 Tada, Kasuga-cho, Tanba City, Hyogo Prefecture (Headquarters)
Representative: Keiji Yamaguchi, Representative Director
HP: https://mapry.co.jp/
Inquiries regarding this matter: info@mapry.co.jp