Non-geodetically-compliant

Referring to a system, method, dataset, or measurement that does not adhere to the principles and standards of geodesy, the scientific discipline dealing with the Earth's shape, gravity field, and related phenomena. This non-compliance often stems from the use of outdated datums, incorrect coordinate transformations, inaccurate elevation models, or disregard for the curvature of the Earth in calculations. Consequently, such instances yield geospatial data or results incompatible with established global or regional geodetic frameworks. Failure to be compliant with standards leads to inaccuracies in positioning, mapping, and spatial analysis applications, thus impacting the validity of findings or the suitability of the information for other uses.

Non-geodetically-compliant meaning with examples

• The outdated GPS receiver in the agricultural drone produces flight paths that are non-geodetically-compliant, hindering precise crop analysis. Due to datum shifts, the geographic information does not line up properly with the national grid causing difficulty. Accurate yield mapping requires the upgrade to a modern RTK-GPS system.
• The legacy CAD software used by the city's planning department generates building footprints that are non-geodetically-compliant, making it challenging to integrate them with contemporary GIS data for urban planning. The software does not perform the calculations accurately. This discrepancy requires additional datum correction steps to avoid misalignment.
• The historical topographic maps were found to be non-geodetically-compliant due to reliance on a local datum, complicating the creation of a comprehensive digital elevation model for flood risk assessment. The coordinate systems and projections were out of sync making it difficult to compare data. Conversion procedures would be needed.
• The research project's preliminary drone imagery was deemed non-geodetically-compliant because of inconsistent georeferencing techniques, preventing accurate spatial analysis of deforestation patterns across the study area. The project lacked a consistent standard across the data. A reprocess was needed.
• Many older navigation systems used by shipping fleets are considered non-geodetically-compliant, using less accurate local reference frames, leading to uncertainties in reported vessel positions especially when coupled with satellite positioning systems. The coordinates are in different datums. Accurate global positioning relies on current and correct geodetic practices.