topic Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied, in ArcGIS Pro Questions

A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JamalNUMAN — Fri, 17 Nov 2017 07:38:33 GMT

A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

In the screenshots below, the image is georeferenced with one control point. However, as the “zoom to layer” tool is applied, the image fails to appear.

What might be the issue here?

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JayantaPoddar — Fri, 17 Nov 2017 09:21:19 GMT

What is the coordinate system of the image?

This issue may arise if the image is of a low quality (check the number of Rows/Columns).

Alternatively, you could Turn Off Auto Apply tool in the Adjust Group, so that the image doesn't move while adding the GCPs.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JamalNUMAN — Fri, 17 Nov 2017 11:10:50 GMT

Thanks Jayanta

The same image is georeferenced in ArcMap without any issue.

The coordinate system of the data frame (Map) is “Palestine 1923 Palestine Grid”. The image is attached

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

XanderBakker — Fri, 17 Nov 2017 11:21:21 GMT

You should always provide multiple points. With 1 point a zero-order polynomial shift is applied. Keep in minder that the jpg has no cell size and the result will not be in any way precise. It will use the cellsize of 1 unit and not apply transformation towards the appropriate cell size. You will need at least 3 control points to aplpy a first-order or affine transformation to shift, scale, and rotate a raster dataset. This will keep straight lines straight. Choose the 3 control points well spread of the image to get a decent result.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JamalNUMAN — Fri, 17 Nov 2017 11:34:10 GMT

Thanks Xander.

My issue here is not how I should do the georeferencing. The issue here is that the Pro fails to zoom as the first control point is applied. How can I proceed to take the second point while the image is not displayed (this is despite the fact that this is done decently with no issues in ArcMap).

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

XanderBakker — Fri, 17 Nov 2017 11:54:07 GMT

I would never leave the Auto Apply on when I start to define the control points when the original raster does not have a valid (logical) cell size. I would define my 3 control points and then switch on the Auto Apply:

The fact that the image does not draw after doing a zoom to layer is something for which you create a support case and have it registered as bug, since it doesn't feel like something a user would want to happen.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JamalNUMAN — Fri, 17 Nov 2017 12:05:12 GMT

For me, I do prefer having “auto apply” on so that I’m aware of the effect of each entered control point.

I hope that esri experts can confirm if this is a bug.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

XanderBakker — Fri, 17 Nov 2017 12:10:18 GMT

If you have the appropriate privileges, you can register a case directly in My Esri or contact your local distributor.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JamalNUMAN — Fri, 17 Nov 2017 12:14:52 GMT

Sure. We are under maintenance contract. I’ll approach them and see if they can fix it

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

AlaaFlaifel — Mon, 20 Nov 2017 10:06:45 GMT

I faced this issue when I tried to georefrence the imagery too.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

DanPatterson_Retired — Mon, 20 Nov 2017 10:19:07 GMT

A solution was proposed. Alternately, a support case could be opened as also proposed in case this is a bug and not a change in the way the process now works. You should confer with Jamal since it appears you are working on the same data

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

AlaaFlaifel — Mon, 20 Nov 2017 10:59:08 GMT

Thanks Dan,

Actually this was an issue too when I turned off Auto apply and created three control points.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

DanPatterson_Retired — Mon, 20 Nov 2017 11:06:18 GMT

Strange... Xander can do it, but your site can't. Sounds like you have some differences in the coordinate systems... Jamal has another post where this was found to be a root cause of his issues. If anything isn't defined, or defined incorrectly, then expected functionality is not going to happen

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

XanderBakker — Mon, 20 Nov 2017 11:33:29 GMT

Indeed strange, might have to do with the exact sequence of the steps involved. Anyway, it would be good to register a case with support, since the image should not disappear.

A small side note about you control points, choose them as well spread as you can. When they are close together any small error will become larger for those areas further away of the area coverage by the control points.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

JamalNUMAN — Mon, 20 Nov 2017 18:41:47 GMT

Correct. Setting a coordinate system for the image (before starting georeferencing) resolves the issue. In ArcMap this is not required to perform georeferencing

It appears that there is a big difference in how ArcMap and Pro handle the same sort of tasks. What could be done in ArcMap in a certain methodology might not be applicable in Pro.

Re: A georeferenced image (with one control point) fails to appear as “zoom to layer” tool is applied,

DanPatterson_Retired — Mon, 20 Nov 2017 18:48:24 GMT

That's right.! They have cleaned up a lot of the sloppiness that existed in ArcMap. You have to be more organized and paying attention to details in Pro. That is a big move forward in my opinion.