Collector GNSS Metadata source of lat/log and altitude

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05-21-2018 09:51 AM
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MVP Regular Contributor

We are in the process of setting up collector to be utilized with a high accuracy GNSS GPS.  Our GPS utilizes the GCS NAD 1983 2011 coordinate system and we are currently performing a transformation to WGS 1984 Web Mercator Auxiliary Sphere for use with ArcGIS Online in Collector.  When the GNSS metadata is captured in collector are the latitude, longitude and altitude values from the non-transformed GNSS coordinate system or transformed values in the WGS WEB Mercator?  

We have concerns about our data undergoing multiple transformations and introducing potential errors between the GPS, Collector, ArcGIS Online and eventually on our data stores.  If the metadata values are the original GNSS data we will simple utilize that information once the data is back on our local systems for processing.

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MVP Regular Contributor

We were able to confirm the latitude, longitude, and altitude values stored in the attribute tape for GNSS GPS data when using Collector are stored in the raw data format for which the GPS is configured.  Do note, the altitude values are stored as height above ellipsoid and need to be converted to elevation post collection.

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MVP Regular Contributor

We were able to confirm the latitude, longitude, and altitude values stored in the attribute tape for GNSS GPS data when using Collector are stored in the raw data format for which the GPS is configured.  Do note, the altitude values are stored as height above ellipsoid and need to be converted to elevation post collection.

View solution in original post