2013

Table Of Contents
Images can be referenced and placed in drawing files, but like external
references (xrefs), they are not actually part of the drawing file. The image is
linked to the drawing file through a path name. Linked image paths can be
changed or removed at any time.
Once you've attached an image, you can reattach it multiple times, treating
it as if it were a block. Each insertion has its own clip boundary and its own
settings for brightness, contrast, fade, and transparency.
NOTE AutoCAD LT 2000 and later releases do not support LZW-compressed TIFF
files, with the exception of English language versions sold in the US and Canada.
If you have TIFF files that were created using LZW compression and want to insert
them into a drawing, you must resave the TIFF files with LZW compression disabled.
For information on identifying referenced images, see Highlight External
References in a Drawing in
Attach and Detach Referenced Drawings (page 456).
Access Raster Images Using the Internet
Designers and manufacturers store images of their designs or products on the
Internet. You can easily access image files from the Internet. URL image file
names are stored in the drawing.
Accessing images from the Internet saves time and provides for rapid
distribution of designs. For example, an architect who needs to show a client
what custom cabinets will look like has the manufacturer create a rendered
image of the cabinets, post it to a website, and then attach the image to the
drawing file as a URL; any design changes can be updated immediately. For
more information, see
Reference Other Drawing Files (page 455).
Scale Raster Images
You can control the size of a raster image in a drawing to match the scale of
the drawing.
You can specify the raster image scale factor when you attach the image so
that the scale of the geometry in the image matches the scale of the geometry
in the drawing. The default image scale factor is 1, and the default unit for all
images is Unitless. The image file can contain resolution information
defining the dots per inch (DPI), relating to how the image was scanned.
If an image has resolution information, the program combines this information
with the scale factor and the unit of measurement of the drawing to scale the
image in your drawing. For example, if your raster image is a scanned blueprint
Work with Data in Other Formats | 495