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Attaches raster images of the following formats to the drawing through dialog boxes:
BMP - Windows bitmap
ECW - Enhanced Compressed Wavelet format
GIF - CompuServe graphic image format
JPG, JPEG, and JPEG2000 (JP2, j2k) - Joint Photographic Experts Group (common among digital cameras)
MTI - Multi-resolution Tiled Image (Bricsys raster format for large images)
PCX - PC Paintbrush
PNG - Portable network graphics
SID - MrSID is an acronym for Multi-resolution Seamless Image Database
TGA - Targa
TIF and TIFF - Tagged Image File Format (commonly used by desktop publishing)
BIGTIFF: TIFF variant file format which uses 64-bit offsets and supports much larger files. To allow fast display operations, BigTiff images are cached in the BricsCAD proprietary MTI format. Until this cache generation is completed, the image frame is displayed.
Accessing the Command
command bar: imageattach
transparent: 'imageattach
alias: iat
menu: Insert | Attach Raster Image
ribbon: Insert | Images | Attach Raster Image
toolbar: Images | 
: ImageAttach
Displays a dialog box:
Choose an image, and then click Open. Displays a second dialog box:
Specify options, and then click OK.
Command Options
|
Options |
Description |
|
Name |
Specifies the file name of the image. |
|
Browse |
Displays the Open dialog box; click this button to choose a different raster file. Choose a raster file, and then click Open . |
|
Path |
Reports the path to the image file; cannot be edited by the user. |
|
Full Path |
Determines how much of the path is stored:
c:\foldername\imagename.ext
..\foldername\imagename.ext where .. refers to the folder above the current one.
|
|
Geocoding Information |
Position files or world files have an extension that depends on what kind of image file they are associated with. See explanatory notes below: "About Geocoding Information". |
|
Use Geocoding Information |
Toggles use of a position file, which specifies the size, location, and rotation of the image file:
|
|
Path |
Reports the path to the position file. |
|
Browse |
Displays the Select Image Position File dialog box; choose a TWF file, and then click Open . |
|
Insertion Point |
Positions the lower left corner of the image in the drawing. This option is unavailable when a position file is used. |
|
Specify On-screen |
Toggles where you specify the insertion coordinates:
Insertion point - (specify the x,y or x,y,z coordinates of the image's lower left corner.) |
|
XYZ |
Specifies the x-, y- and z-coordinate of the image's lower left corner. |
|
Scale |
Sizes the image. This option is unavailable when a position file is used. |
|
Specify On-screen |
Toggles where you specify the scale factors:
Scale factor - (specify the scale factor.) |
|
XY |
Specifies the scale factor in the x and y direction:
|
|
Uniform Scale |
Makes the Y scale factor equal to X. |
|
Rotation |
Rotates the image about the insertion point. |
|
Specify On-screen |
Toggles where you specify the rotation angle:
Rotation angle - (specify the angle.) |
|
Angle |
Specifies the rotation angle about the insertion point.
|
About Geocoding Information
Position files (or world files) are plain ASCII text files that position raster files in the drawing. They are useful for positioning images according to geographic coordinates, such as latitude and longitude. They can be created using text editors such as Notepad .
The format is a list of 6 numbers that fully describe location, scale and orientation of the top left pixel of the raster file to be attached.
If U is the vector along the width, V is the vector along the height, and O is the center of the pixel (see image below):
then the list consists of:
Ux
Uy
Vx
Vy
Ox
Oy
Typically, the first and last letters of the image extension are used with a ”w” added at the end. Sometimes the full image extension with a ”w” at the end is used also.
The following position file formats are supported:
- *.bpw (for BMP images)
- *.jgw (for JPG images)
- *.gfw (for GIF images)
- *.tfw (for TIFF images)
- *.j2w (for JPEG2000 images)
- *.sdw (for SID images)
- *.pgw (for PNG images)
Procedures
Related Commands
Image - controls the parameters of the image file.
-ImageAttach - attaches raster images to the drawing; displays prompts in the command bar.
ImageAdjust - changes the properties of images through the Properties palette.
ImageClip - clips images.
ImageFrame - toggles the display of the frame around images.
ImageQuality - toggles the quality of the image.
Transparency - toggles the transparency of monotone images.
