topic Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro? in ArcGIS Pro Questions

Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Fri, 24 Nov 2017 20:27:28 GMT

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.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

DanPatterson_Retired — Fri, 24 Nov 2017 23:57:55 GMT

forward and inverse are in the control table apparently

http://pro.arcgis.com/en/pro-app/help/data/imagery/georeferencing-options.htm

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Sat, 25 Nov 2017 07:13:49 GMT

I couldn’t find the total RMSE as shown in the screenshots below

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

DanPatterson_Retired — Sat, 25 Nov 2017 09:30:32 GMT

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.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Sat, 25 Nov 2017 11:05:23 GMT

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.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

DanPatterson_Retired — Sat, 25 Nov 2017 13:44:39 GMT

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.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

Robert_CraigAshby1 — Fri, 19 Apr 2019 14:42:33 GMT

So the RMSE is not reported at all in PRO? Is this correct?

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

Robert_LeClair — Fri, 19 Apr 2019 16:52:45 GMT

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.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

Robert_LeClair — Fri, 19 Apr 2019 16:54:00 GMT

RMSE is supported and reported in AGP - there's a usability bug referenced above to Jamal.

https://pro.arcgis.com/en/pro-app/help/data/imagery/overview-of-georeferencing.htm#ESRI_SECTION1_61F70AE3AC6C47559B3C03C74F093505

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

KoryKramer — Fri, 19 Apr 2019 17:18:22 GMT

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!

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Fri, 19 Apr 2019 18:54:08 GMT

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?

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

Robert_CraigAshby1 — Wed, 24 Apr 2019 14:13:20 GMT

Okay, so it's not currently reported but is being fixed. I see.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Wed, 24 Apr 2019 19:10:36 GMT

It would be great if we hear back from esri staff

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

Robert_LeClair — Fri, 10 May 2019 08:37:06 GMT

Jamal - still in the Product Plan but don't know when. Sorry to be vague.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Sat, 07 Sep 2019 16:38:17 GMT

The total RMSE appears not to be available in 2.4.1

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

curtvprice — Sun, 08 Sep 2019 03:15:32 GMT

I subscribed to the bug to add to the pressure - but the bug now says it was addressed and fixed "near term" modified 8/9. That's a good sign it will be in 2.4.2. We can hope! Thank for pushing Jamal, I think the overall number is needed too!

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

SimonWoo — Mon, 09 Sep 2019 16:47:48 GMT

As Jamal has already alluded to, the RMS errors are reported in the Heads up display.

There are 3 types of RMS that we report in both types of software. The Forward transformation is always the default RMS. But if you show all three types of errors in both software programs, you can see they are both available in both sortware.

As you can see the top Image from Pro is the same as the bottom image from ArcMap (slight difference in rounding).

Please let me know if there is still any confusion. There is no real bug; simply an enhancement that some users were requesting it in BOTH the heads-up display and the table.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Sat, 14 Sep 2019 08:10:22 GMT

I couldn’t find any information in the help that explains what these values mean in terms of geometry neither having figures (pictures) that better explain the idea. I would appreciate if you guide me for such integrated resources.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

SimonWoo — Mon, 16 Sep 2019 15:29:19 GMT

I do not have any illustrations, but the last third paragraph of this section should explain it.

https://dev.arcgis.com/en/pro-app/help/data/imagery/overview-of-georeferencing.htm#ESRI_SECTION1_61F70AE3AC6C47559B3C…

It is not a mathematical concept we have created, so perhaps there are illustrations on some other math related sources on the web.

Re: Where the RMSE of Georeferencing is displayed in ArcGIS Pro?

JamalNUMAN — Mon, 16 Sep 2019 16:41:27 GMT

Thanks Simon. The link is not working