When you insert an image
using the Insert An Image command, you
can correlate the image with your existing vectors or a previously
correlated image. You can change the insertion point and rotation
of the image so that it is inserted correctly in relation to other
data. You can also adjust the scale so that it matches the scale
of the other data.
the image you are inserting is supported, connect to it and add
it to your map using Data
. This gives you more control over
styling and other options.
You can set the following
options when inserting an image:
- Correlation source
- Insertion point (georeferencing correlation
- Units for insertion point and density
If you modify the correlation
settings, AutoCAD Map 3D saves the changes with the drawing. The changes
are not saved back to the image file or to the correlation source
modify the settings stored in the image file, use an image-editing application
such as . If you modify the original settings in the image, you
must reinsert the image to see the changes.
- Correlation Source — Displays
available correlation sources. (See the Correlation Sources section,
following.) If a source is not listed, it may not be in the same
directory as the image file or, if it is a resource (.res) file, it may not be on the
specified resource file path.
Note To specify the path for resource (.res) files, at the Command prompt, enter
mapioptions. Select the Paths tab.
- Insertion Point — The
insertion point is the lower left corner of the image before any
rotation is applied.
The insertion point values on the Source tab
of the Image Insertion dialog box
use the unit specified at the bottom of the Source tab.
The insertion point values on the Insertion tab
are translated to the current AutoCAD Map 3D drawing unit.
You can edit the settings or select an insertion
point in the drawing by clicking Pick on the Insertion tab
and then picking a location in the drawing.
- Rotation — Rotation
is in degrees or in the units set by the AUNITS variable. The image
is rotated around the insertion point.
- Scale — If
the image you insert contains correlation information, the image
is inserted at the scale specified by that information. Otherwise,
the image is inserted at a scale factor of 1 image unit of measurement
to 1 AutoCAD Map 3D unit of measurement. You can change the scale to align
the image with the vector geometry in the drawing. For example,
if your raster image has a scale of 1 inch equals 50 feet or 1:600,
and your AutoCAD Map 3D drawing has a scale of 1 unit equals 1 inch,
enter 600 as the scale
on the Insertion tab.
- Density — For
bitmaps, the density unit used in the image may be in dots per inch.
For satellite photos, the density may be in miles. This unit is
also used for the insertion point.
To see how your correlation
settings translate to AutoCAD Map 3D units, select the Insertion tab.
To preview the settings in the drawing, click Apply.
modify correlation settings after you insert an image use the Properties palette.
When you insert an image, AutoCAD Map 3D searches
for correlation files for the image and displays them in the Correlation
Source list of the Image Correlation dialog
box. You may see the following sources listed.
- World File (Various
- Resource File (.res) — You can specify
an alternate location for resource files. See Setting the Resource Files Directory.
- Tab File (.tab)
- Image File — For
certain types of images, correlation data can be saved as part of
the image file. These file types include RLC, IG4, IGS, GeoTags
in GeoTIFF, or HDR File in GeoSPOT.
- Default — The values that you
set on the Image Defaults tab of the Raster Extension
Options dialog box.