Microstation

How to Edit Raster Files in Microstation?

by Wei Zhang
4 min read

Understanding Raster Files in MicroStation

Raster files are bitmap images composed of pixels, often used for reference in design projects within MicroStation. These files allow designers to incorporate scanned maps, photographs, and graphics into their designs easily. The Raster Manager module is essential for managing these files, offering tools for attaching, editing, and manipulating raster images without altering the original content.

Attaching Raster Files

  1. Open the Raster Manager: Access the Raster Manager by navigating to the menu bar. Click on File, then choose Raster Manager. You may also find a dedicated icon for quick access.

  2. Attach a Raster File: Within the Raster Manager, select File > Attach > Raster. Browse your computer to find the desired image file. After selecting it, click Open. There may be an option to place the image interactively by checking the relevant box.

  3. Setting Attachment Options: The Raster Attachment Options dialog will appear, allowing you to modify placement settings like resolution and layer options. Confirm your settings and click OK to attach the file.

Clipping Raster Images

  1. Select the Clip Tool: Open the Raster Control toolbox and choose the Clip tool. This allows you to define the area of your raster image you want to retain.

  2. Configure Tool Settings: Set the Object to Block and Mode to Clip Mask. This ensures the desired clipping mask is applied correctly.

  3. Define Clipping Area: Click a data point to designate one corner of the clip area. Then, define the opposite corner by placing another data point. If multiple raster images are attached, ensure you select the image you want to edit.

Editing Raster Files

  1. Unlock Raster Images: If your raster image is locked, select it and press CTRL + M or go to Edit > Unlock to enable editing.

  2. Modify Attributes: In the Raster Manager, you can modify the attributes (like transparency and rotation) of the attached raster file. Select the raster image and access the properties to make adjustments as necessary.

  3. Apply Clip Mask by Points: If you need to apply a clip mask using two points, select the Apply Clip Mask By 2 Points option in the tool settings. Click the two corners of the desired rectangular clip area to finalize the mask.

Managing Data Fields

  1. Editing Data Fields: To modify existing data fields within your raster image, select the text with the Text Editor. Highlight the field to be updated, right-click, and choose Edit Field to adjust the content.

  2. Insert New Data Fields: To insert new data fields, select the text area where you want the field. Open the word processor window, position your cursor, right-click, and select Insert Enter Data Field. This allows for dynamic data linking.

Creating Clip Boundaries

  1. Defining a Clip Boundary: Use the fence tool to outline the area you want to clip. This creates a temporary boundary for your reference.

  2. Select References: In the References dialog box, highlight the images you want to include in your clip boundary.

  3. Clip Reference: Once references are selected, click the Clip Reference icon. This activates the Set Reference Clip Boundary tool settings, allowing you to finalize your adjustments.

Georeferencing Raster Images

  1. Access Preferences: Go to the Workspace menu and choose Preferences. The Preferences dialog box will appear, displaying various settings.

  2. Select Georeference Options: In the left pane, navigate to Raster Manager and click on the Georeference tab to configure georeferencing settings for accurate map alignment.

Frequently Asked Questions

How can I unlock a raster image if I can’t edit it?
To unlock a raster image, select it first, then press CTRL + M or navigate to Edit > Unlock. This should release the editing lock and allow you to make changes.

What should I do if my raster file doesn’t show up after attaching it?
Check the display settings and ensure that the raster file is within your current view area. Also, confirm that the raster image is not hidden in the level settings.

Is it possible to edit the original image data in MicroStation?
No, MicroStation’s Raster Manager allows for non-destructive editing. This means most modifications only affect the raster’s attachment in the DGN file, keeping the original data intact.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.

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