Location

Origin

Defines, in working units, the X,Y and Z (Z is grayed out for 2D design files) coordinates for the origin of the raster file. That is, the location of the lower left corner of the image.

The X, Y and Z origin of a 3D design file, is displayed using the difference in the default setting (2147483.6470) and the values obtained when doing a "GO=$". The "GO=$" is the active global origin value.

Pixel Size/Scale Factor

Option menu button providing two choices, Pixel Size or Scale Factor:

• Pixel Size
— Defines the size of each pixel, in working units. You can edit this field but it never adjusts automatically. If you change the pixel size, then the image dimensions adjust accordingly, while the number of pixels remains unchanged.

Because pixel size is expressed in MicroStation Working Units, when calculating the pixel size, the scale of the image must be taken into account, as well as the scan resolution of one pixel. The size of one pixel is calculated as follows:

Pixel Size = Scale of Image X Scan Resolution of one pixel.

For example, if the scale is 1:5000 and the scan resolution is 300 dpi, then:

Pixel Size = 5000 X (1/300) = 16.66 inches.

• Scale Factor
— Defines the scale factor of the image, in the format 1:n, as well as the resolution in dots per inch (DPI) for the X and Y directions.

Rotation

Sets the rotation angle of the image.

Affinity

Sets the skew angle of the image.

Width

Lets you set the width of the image in Working Units.

Height

Sets the height of the image in Working Units

Number of Pixels

Displays the number of pixels in the X and Y directions for the image.

WorldFile Unit

Defines each measurement unit used with the Worldfile (TFW) sisterfile. Default is Meters. This section is only visible when the file has an associated Worldfie (sisterfile).

Geocoding Information

Geocoding information, where it is present in the attached image file, is displayed and may be modified via option menus — one for Coord Sys(tem) and one for Projection.