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Clipping inside vs outside.

ScottBarron

Hi,
I have a large raster image, and a much smaller raster image located inside the larger one. I want to clip a hole in the larger one where the smaller image is. How do I do this? I came across the clip function: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009t00000048000000, which appears to be exactly what I want, but I can't seem to find the tool, even when I search for it... Any advice?

Thanks,
-Scott

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Accepted answers

RodneyVese1

Sorry about that I thought you just wanted the clip tool , The clip function can be found under Data managment tools>Raster>Raster Processing>Clip

All comments

RyanDeBruyn

Now we're talking! Thanks Steve, this looks great. Any advice on using the toolbox? I downloaded it, and change the python scripts per the txt file, but whenever I try to open a tool it says "Invalid Tool. Unable to execute the selected tool."

Scott what version of ArcGIS are you using?
Are you refering to changes in the ReleaseNotes.txt needed for the tools to work with 10.1 rather than 10.1 service pack 1 as required?

RyanDeBruyn

Yes, those tools are cool...however, you may need the Spatial Analyst and a higher ArcGIS Desktop license to run any or all of the associated tools.

The requirements for the supplemental tools are:

ArcGIS 10.1 Service Pack 1 and Spatial Analyst Extension

Only the Filled Contours tool requires ArcGIS for Desktop Advanced or ArcGIS for Server Advanced and Spatial Analyst Extension.

T__WayneWhitley

Yes, those tools are cool...however, you may need the Spatial Analyst and a higher ArcGIS Desktop license to run any or all of the associated tools. For your requirements, Clip in Data Management (supported at all license levels) essentially does the 'Erase' function if you use the ClipGeometry option (the check box) and provide a geometry with a 'hole' in it - presumably that would be your 'smaller extent' you wish to remove.

Just have to be careful with the 'promoting pixel depth'...your output raster format has to be able to support that operation if that has effect...I used tif input along with the requisite polygon w/ a hole in it to mimic your requirement, and reset the raster properties on the added output in the map to not 'stretch' (to match symbology settings as in the original tif).

Someone may have already committed some tool 'magic' on the input ClipGeometry in the tool Gallery somewhere - sorry, I don't have time for it, and it's a simple thing really anyway to create it yourself. The main thing here is that the Clip tool supports 'erase' functionality...the tool(s) Steve posted far exceeds this functionality.

Enjoy,
Wayne

EDIT: So, actually Rodney had the 'answer' at post #4. (if you want to award him)

ScottBarron

Now we're talking! Thanks Steve, this looks great. Any advice on using the toolbox? I downloaded it, and change the python scripts per the txt file, but whenever I try to open a tool it says "Invalid Tool. Unable to execute the selected tool."

SteveLynch

Have a look at New Spatial Analyst Supplemental tools, v1.2

ScottBarron

Erase does what I'd like, but not with rasters. I guess that workaround might be my best solution for right now. Thanks for your help.

T__WayneWhitley

Just curious, essentially what you have described is Erase, correct? But such a function does not exist for rasters, is that not also correct? But one way may be that if you had a 'universe' polygon as the extent of the larger raster and erased an inner extent of the smaller raster, could you not use the result in a Clip Raster operation?

Enjoy,
Wayne

ScottBarron

Unfortunately still not what I'm looking for (Clip and Clip Function appear to be different). I don't want the standard "clip a larger object down to a smaller size", I want to clip a hole in a larger object, so that the extent of the larger object remains the same, but the values where the smaller object overlap are gone.

RodneyVese1

Sorry about that I thought you just wanted the clip tool , The clip function can be found under Data managment tools>Raster>Raster Processing>Clip

ScottBarron

Hi,
It's not the clip tool I'm looking for (that only works with shapefiles I believe), but instead clip function, which allows me to clip inside or outside of my clipping area.

If you look at the picture on the link I posted above, that's what I'm trying to do.

RodneyVese1

You can access clip through the toolbox. Not sure why it won't show up in search results but you can access this tool under Toolbox>Analysis Tools>Extract>Clip

[ATTACH=CONFIG]28407[/ATTACH]

Cliptool.PNG

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