This feature removes "noise" or stray pixels from monochrome raster files with a single click, which is common in older scanned drawings.
Goal: Convert a scanned paper site plan (JPG) into a clean, scaled DGN drawing.
Have a specific raster challenge in MicroStation? Reply with your use case – I'll share the exact tool or script to solve it. microstation rasterdgn
Otherwise, the base raster tools are more than sufficient for 90% of underlay, tracing, and georeferencing tasks.
Use standard MicroStation tools (Place Line, SmartLine) to trace walls, roads, or contours. This feature removes "noise" or stray pixels from
Reduce brightness/contrast so your vector traces stand out. Set transparency to 30–40%.
: Features a dedicated tool (often represented by a vacuum cleaner icon) to automatically remove "noise" or stray speckles from monochrome scans. Reply with your use case – I'll share
Unlike MicroStation’s native clipping, which only hides parts of an image, RasterDgn can permanently delete unneeded portions of the file in one step. Why Use RasterDgn Over Native Tools?
In the evolution of computer-aided design (CAD), the transition from traditional drafting tables to digital workstations represented a seismic shift. However, this transition did not happen overnight. For decades, engineering firms, architectural practices, and government agencies accumulated vast archives of paper drawings, mylar sheets, and blueprints. The challenge of integrating this legacy data into modern vector-based workflows gave rise to the necessity of raster integration. Within the Bentley Systems ecosystem, this capability is most effectively managed through RasterDGN. As a pivotal tool in the MicroStation suite, RasterDGN allows users to incorporate, manipulate, and hybridize raster data with vector precision, serving as a bridge between the history of physical documentation and the future of digital infrastructure.
| Problem | Likely Fix | |---------|-------------| | Raster appears but doesn't line up | Check world file name matches image exactly. Load world file manually in Raster Manager. | | Very slow redraw | Switch to View > Quality > Low (faster pan/zoom). Or compress raster to ECW. | | Raster prints too dark | Adjust brightness/contrast under Raster Manager > Edit > Adjust Colors. | | Can't select the raster for clipping | Ensure the raster is selected in Raster Manager, not just visible. Use Select > Raster tool. | | Missing raster on file open | Raster path broke. Use Raster Manager > Repair > Set Search Path or repath. |
Use Raster > Warp or manually move/rotate using Transform > Raster . If two known points exist (e.g., grid intersections), use Rubber Sheet to warp the image.