topic Re: Define projection problem in Coordinate Reference Systems Questions

Define projection problem

Yaron_YosefCohen — Wed, 25 Feb 2015 08:07:21 GMT

Hi,

i have an ECW raster that have no spatial reference. when i try to use the tool "defined projection" to define it i get an errors num. 001143 . thanks for any help.

Re: Define projection problem

NeilAyres — Wed, 25 Feb 2015 10:26:09 GMT

Permission problems perhaps?

Try copying the image locally and then define the projection.

Re: Define projection problem

Yaron_YosefCohen — Wed, 25 Feb 2015 10:35:19 GMT

i copied the raster then defined-get an error

Re: Define projection problem

NeilAyres — Wed, 25 Feb 2015 10:38:53 GMT

Instead of using the toolbox, why not navigate to the image file in ArcCatalog, get the properties and define the projection there.

Also turn off background processing.

Re: Define projection problem

Yaron_YosefCohen — Wed, 25 Feb 2015 10:43:26 GMT

nop, it remain the problem... what else can i do?

Re: Define projection problem

NeilAyres — Wed, 25 Feb 2015 10:48:18 GMT

ArcGIS version?

Show us a screenshot of the data in ArcCatalog.

Have you turned off background processing.

Is the image local. Have you checked file permissions?

If you use the properties page to define the projection, what happens?

Re: Define projection problem

Yaron_YosefCohen — Wed, 25 Feb 2015 10:59:50 GMT

arcview 10.3

the file is "arb_m.ecw"

i turn of background processing and the problem remain

the image is in local hard disk

when i use the properties page to define the projection, nothing happened

where i check file permissions ?

Re: Define projection problem

NeilAyres — Thu, 26 Feb 2015 09:09:19 GMT

Just use the normal windows file explorer to check the file permissions. Make sure that they are not read only (and the directory the files are in).

In Catalog above, can you preview the data?

Re: Define projection problem

KishorGhatage — Thu, 26 Feb 2015 11:02:15 GMT

Could you please try this:

1. Go to Customize mernu > ArcMap options > Raster Dataset

2. Check Use world file to define the coordinates of the raster

3. Click Ok

4. Add ECW in ArcMap and check the spatial reference.

Hope this is helpful

Regards,

Kishor

Re: Define projection problem

roemhildtg — Fri, 18 Mar 2016 18:30:19 GMT

I tried these steps and it did not work. Spatial reference is still undefined after running the Define Projection tool.

Re: Define projection problem

roemhildtg — Fri, 18 Mar 2016 18:30:53 GMT

Did you ever find a solution to this? I have an ecw file and I cannot define the projection.

Re: Define projection problem

NeilAyres — Mon, 21 Mar 2016 06:57:10 GMT

This problem still gets down to file permission problems on the system where the ecw exists.

Just check using the normal windows tools.

Also could try importing the ecw into a file geodatabase, and define the projection there using the properties page in ArcCatalog.

Re: Define projection problem

MaxClever — Tue, 17 May 2016 20:43:01 GMT

We are having the same problem with ECWs. It is a common problem that started with our switch to ArcGIS 10.3 from 10.2. We can define the projection fine in 10.2 and it shows up in the correct spot in 10.2 but will not show up in the same spot in 10.3 with the same data frame parameters. This is a bug imo.

Re: Define projection problem

MelitaKennedy — Tue, 17 May 2016 21:28:28 GMT

I can find three reported bugs for this problem for different software. The one for ArcGIS for Desktop is BUG-000091720 and there's a related one,BUG-000083374, which looks like has been fixed for 10.4.1. There's a similar one for ArcGIS Pro: BUG-000083375.

Melita

Re: Define projection problem

MaxClever — Sat, 04 Jun 2016 00:01:03 GMT

This bug is not fixed in 10.4.1. My ECWs still show up shifted compared with using 10.2. The same image in .sid and tiff format stays the same between versions.

Re: Define projection problem

DanPatterson_Retired — Sat, 04 Jun 2016 00:55:47 GMT

The bugs that made it to the fixed list are here http://downloads.esri.com/support/downloads/other_/1041-IssuesAddressedList.pdf

and it was surrounded in 10.4 http://downloads.esri.com/support/downloads/other_/104-IssuesAddressedList.pdf

So watch for the next release unless he lists are incomplete.

Re: Define projection problem

MaxClever — Fri, 14 Oct 2016 16:24:46 GMT

This bug is not fixed in 10.5 pre-release edition. My ECWs still show up shifted compared with using 10.2. The same image in .sid and tiff format stays the same between versions.

Re: Define projection problem

MelitaKennedy — Wed, 19 Oct 2016 22:45:54 GMT

I checked on these bug numbers again. All three have both been marked as-designed (two in July 2016 and the other about a year ago) with this statement in the 2nd one: "The ECW sdk has been updated, to take the projection information in the dataset and use that. This was not being done in 10.2. Hence the prj file is not used but instead the projection info in the dataset is given precedence. This is as designed."

By SDK, I assume that they mean the code that handles ECW as a raster type. So if there was a discrepancy between the internal coordinate system/georeferencing information versus the external (prj file and world file?) that could be where the offsets are coming from. If you have ECW and you're sure this isn't the problem, contact techsupport again, reference the bug numbers and say you think there's a different problem.

Melita

Re: Define projection problem

MattFielder — Mon, 04 Feb 2019 16:26:42 GMT

I had this problem in 10.4.1 as well but found that Define Projection worked in ArcGIS Pro 2.3.

In 10.4.1, neither the Define Projection tool or the Edit feature in the raster properties worked for setting the projection on an old .ecw file in ArcMap and ArcCatalog 10.4.1. There were no read/write or other permission problems and I tried copying/moving the file to different file locations to no avail.