Zone marker – Print PDF transparency

One of the unique feature of gCADPlus landscape design software is its ability to apply transparency to filled entities such as circles, polylines, rectangles, polygons etc. The figure below shows part of a quite detailed design for a food garden that features a greenhouse in one corner of the plot. A block (symbol) with a buff colour with a transparency value is used as a zone indicator and is shown overlaying the location of the greenhouse. This draws the viewers eye to that structure, but despite the fill, it is still possible to see the underlying path and structure.

Apply transparency

YouTube movie Here we show that a block symbol containing a filled circle entity with a low value for transparency can be used with good effect to indicate zones within a landscape design.

Printing designs

Despite considerable effort, we have not been able to find a ‘proper’ PDF writer that will print entities that are filled with color and with the transparency value set to less than 100%, so we developed our own SaveAsPDF tool to produce an acceptable shaded PDF file.

When generating PDF files in this way, we suggest starting with a medium resolution setting – one that produces an acceptable result rather than selecting the maximum resolution. If you are working with a detailed design, and choose maximum resolution, gCADPlus may print very slowly or even crash.

If you would like a copy of the symbol used in the design above, click here to download it.