Merge ECW image

[SamKwan]

I have many ECW image tiles, each as separate layer.  How can I combine them into one image? I am not talking about group because I need one singe image!!

[SimonKettle]

Have you tried using a 'raster catalog'?

These are made in a geodatabase...and can combine raster images together in a mosaic.

http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Creating%20raster%20catalogs%20in%20a%...

[SamKwan]

Thanks Simon. I can create raster catalog and I tried merging the ECW images. It does work for my trial of a few images. But when I tried to merge all the 98 images, it crashed. Maybe files are too large. So do you think there is any way to do so?! Thanks.

[RobertBerger]

Hi Sam,

When you say "merge" did you simply try to use the raster catalog or did you try to mosaic the datasets into a single dataset.
If it is the latter, then be aware that ECW is highly compressed which means you need a lot of disk space to write out the new file.

Robert

[SimonKettle]

Yep exactly what Robert said...maybe the amount of disk space being used is too large.

[SamKwan]

I try to mosaic them into one layear so that I can drap it in the ArcScene. So are they any alternatives to do so?!?!

[RobertBerger]

Hi Sam,

Have you tried using the raster catalog in ArcScene? I would also suggest building an unmanaged raster catalog. You can additionally play with the display properties if you do not want to see the wireframe.
If you have 10.0 I would suggest using the mosaic dataset as it has many more options for you to manage your data.

Robert