Keeping pace with ASPRS

Demand for spatial data such as orthophoto mosaics is increasing, as governments and business realise the immense value in this data for planning, monitoring, designing and investigating both natural and human made landscapes.

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Landair Surveys uses American Society for Photogrammetry and Remote Sensing (ASPRS) standards as a guide to confirm the accuracy of our work.

Our surveying team was excited by the announcement of new standards in Positional Accuracy Standards for Geospatial Data by the American Society for Photogrammetry and Remote Sensing (ASPRS) .

The standards include updates to? General Best Practices and Guidelines and Best Practices and Guidelines for Field Surveying of Ground Control and Checkpoints.

The most significant changes introduced in this 2nd Edition of the ASPRS Positional Accuracy Standards for Digital Geospatial Data include:

• Elimination of references to the 95% confidence level as an accuracy measure.
• Relaxation of the accuracy requirement for ground control and checkpoints.
• Consideration of survey checkpoint accuracy when computing final product accuracy.
• Removal of the pass/fail requirement for Vegetated Vertical Accuracy (VVA) for LiDAR data.
• Increase the minimum number of checkpoints required for product accuracy assessment from twenty (20) to thirty (30).
• Limiting the maximum number of checkpoints for accuracy assessment to 120 for large project.
• Introduction of a new term, “three-dimensional positional accuracy."
• Addition of Guidelines and Best Practices Addendums for:

1. General Guidelines and Best Practices
2. Field Surveying of Ground Control and Checkpoints
3. Mapping with Photogrammetry
4. Mapping with LiDAR
5. Mapping with UAS

“The new edition of these standards will have a positive impact on our geospatial capabilities and all who benefit from these services worldwide for years to come, it is a historical moment that we should all be proud of,” said Dr. Qassim Abdullah, Vice President and Chief Scientist of Woolpert, who led the ASPRS Positional Accuracy Standards Working Group.

“As our 3DEP LiDAR Base Specification is closely aligned with the ASPRS standards, we welcome these updates to the standards introduced in the Second Edition. We hope these updates bring even more clarity to an already well adopted standard on acquiring geospatial data,” said Dr. Michael Tischler, Director, USGS National Geospatial Program.

Landair Surveys actively maintain membership of organisations like ASPRS to ensure we keep up to date with changing technology and methods of delivering best practice work for our clients.

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Source: www.asprs.org