AutoCAD Map 3D

[#1]

Hi !

In AutoCAD Map 2013 I opened a georeferenced raster image by using FDO.

How can I hide unnecessary area of the raster map. In Raster Design has several functions to do this operation. But it work only then when you open it by Raster Design INSERT command. In FDO how can I do it?

Thanks all!

[#2]

Did you just try the _WIPEOUT command..?

[#3]

No. _wipeout hides only inside area of raster. In AutoCAD has CLIP and In Raster Design has CROP commands. I want to apply  crop or clip to raster. Do you know any AutoCAD Map command like crop or clip for the FDO objects?

[#4]

I meant: use some wipeouts to hide "around" the center of the image, then put off the wipeout frames, and you're done.
Check the attached out: before => in the meanwhile => after...

[#5]

antoniovinci, thank you very much. It is a good methot.

But, I want to know from moderators are there rational commands to do this by AutoCAD Map?

[#6]

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bingeomatics wrote:

I want to know from moderators

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Waiting for the moderators' answer (I can't stop chucklin', man..), let me show you an advanced wipeout technique.

As you saw, you can use some rectangular wipeouts to mask your image around the center: the result is very fast, but straight.

What about clipping by exact geographical border, like this red one?

To do that, you should only break the border in 2 points, and "build" two new closed polylines:

Now you can apply the _WIPEOUT command:

Finally you switch their frames off:

[#7]

But,  my rasters are scanned several topographical maps and I want to hide these outeside from geographic frame. If I will apply wipeouts neighbour maps will above wipeouts. too.

[#8]

Here's the two drawbacks when hiding with wipeouts:

1. even if you mask some parts of an image, it stays completely in memory
2. the resulting hidden image is not georeferenced, because it still "belongs" to the entire one.

To resolve this issue, I advise to clip by shape with the opensource Qgis: in the attached file (Elba island, West Italy, EPSG:23032) a Geotiff "before", the clipping shapefile, and the Geotiff "after".

If you load the clipped Geotiff in Acad, and switch its transparency ON in the props, only the land will be opaque.

[#9]

Hmmm, antoniovinci, thank you very much to try help me.

I understood that if I want to use a raster, I must to clip the raster by Autodesk Raster Desig beforehand and only after it I can open the raster in FDO. Am I right?

[#10]

I don't know RD, so I can't say if it's able to clip a geo-raster, and save it with full georeferency as Qgis does: maybe you'd post here, sir.