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Real-time Datum Choose Wisely!!

Real-time Datum Choose Wisely!!. Match the correction source’s datum to store GPS positions without transformation (WGS84). “The Mantra” Every time you apply a correction you assume the geodetics of that base. What happens when we select the matching datum ?. GPS Receiver:

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Real-time Datum Choose Wisely!!

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  1. Real-time DatumChoose Wisely!! Match the correction source’s datum to store GPS positions without transformation (WGS84) “The Mantra” Every time you apply a correction you assume the geodetics of that base

  2. What happens when we select the matching datum? GPS Receiver: GPS Position is WGS-84 GPS Location WGS84 Control/Existing Data NAD83 CORS 96 Real-time Single Base NAD83 CORS 96 corrections GPS data is now transformed to NAD83 CORS 96 NAD 83 CORS 96 CorrectionDatumconfigured in TS Display MISMATCH! Control = CORS 96 GPS Location = WGS84 CORS 96 Transformed back to WGS84 GIS DATA IS IN NAD83 CORS96!!! SSF File MISMATCH! Control = CORS 96 GPS Location = WGS84 Export to GIS Use NAD83 CORS 96 Transformation

  3. What happens when we select the matching datum? GPS Receiver: GPS Position is WGS-84 GPS Location WGS84 Control/Existing Data NAD83 CORS 96 WAAS Real Time WGS84 GPS Data is still in WGS84 WGS84 Correction Datum configured in TS Display MISMATCH! Control = CORS 96 GPS Location = WGS84 Data remains in WGS84 GIS DATA IS IN NAD83 CORS96!!! SSF File MISMATCH! Control = CORS 96 GPS Location = WGS84 Export to GIS Use NAD83 CORS 96 Transformation

  4. Correction Datum for Display/Navigation GPS Receiver: GPS Position is WGS-84 GPS Location NAD83 CORS 96 Control/Existing Data NAD83 CORS 96 Real-time Single Base NAD83 CORS 96 corrections GPS data is now transformed to NAD83 CORS 96 WGS84 CorrectionDatumconfigured in TS Display MATCH! Control = CORS 96 GPS Location = CORS 96 CORS96 Data Remains GIS DATA IS IN NAD83 CORS96!!! SSF File MATCH! Control = CORS 96 GPS Location = CORS 96 Export to GIS Use NAD83 (CONUS) or WGS84

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