Where the RMSE of Georeferencing is displayed in ArcGIS Pro?
I couldn’t figure out where the RMSE of Georeferencing is displayed in ArcGIS Pro.
forward and inverse are in the control table apparently
I couldn’t find the total RMSE as shown in the screenshots below
does it appear after you are done the process? or are these just screen shots as you are going along? It isn't clear
The interpreting rms error section here suggests you might be more concerned about the individual points. Perhaps the total has been left out if favor of more detailed information during the collection.
The total error is computed by taking the root mean square sum of all the residuals to compute the RMS error. This value describes how consistent the transformation is between the different control points (links). When the error is particularly large, you can remove and add control points to adjust the error. Although the RMS error is a good assessment of the transformation's accuracy, don't confuse a low RMS error with an accurate registration. For example, the transformation may still contain significant errors due to a poorly entered control point. The more control points of equal quality used, the more accurately the polynomial can convert the input data to output coordinates. Typically, the adjust and spline transformations give an RMS of nearly zero or zero; however, this does not mean that the image will be perfectly georeferenced.
The forward residual shows you the error in the same units as the data frame spatial reference. The inverse residual shows you the error in the pixel units. The forward-inverse residual is a measure of how close your accuracy is, measured in pixels. All residuals closer to zero are considered more accurate.
Of course if your intent is to reach zero.. then you may fall into the trap of assuming that the minimum number of points that produces a total of zero is the best... this simply isn't the case
A minimum of four links are required to perform a projective transformation. When only four links are used, the root mean square (RMS) error will be zero. When more points are used, the RMS error will be slightly above zero.
What wanted to know here, is where does the RMS Error appear in Pro as it used to be displayed in the “link table” in ArcMap. I fail to find the total RMS anywhere in the Pro.
An idea or they have removed it because of total rms error misuse
Although the RMS error is a good assessment of the transformation's accuracy, don't confuse a low RMS error with an accurate registration.
Jamal - there is a usability bug for this. It's in the Product Plan to be improved but do not know what future release.
BUG-000112904 : The box that displays information regarding transformation type, number of control points, and total RMS errors while georeferencing a raster dataset is in an inconvenient location.
So the RMSE is not reported at all in PRO? Is this correct?
RMSE is supported and reported in AGP - there's a usability bug referenced above to Jamal.
Thank you for pointing the bug out Robert LeClair. For anybody on this thread affected by that bug, please visit it on support.esri.com https://support.esri.com/en/bugs/nimbus/QlVHLTAwMDExMjkwNA== and click the Subscribe button.
Not only will that provide you with notifications of the bug's status, but it also provides us a more holistic picture of number of users affected. Thank you!
In 2.3 release, I could see values for the forward, inverse, and forward-inverse residuals but not for the Total RMSE as used to be in the ArcMap.
Is this by design?
Okay, so it's not currently reported but is being fixed. I see.
It would be great if we hear back from esri staff
Jamal - still in the Product Plan but don't know when. Sorry to be vague.
Retrieving data ...