JSANCHEZ, LLC
Gray scale raster
image, edited by graphics technician
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Edited Gray Scale Image files are created from black and white originals, captured in 256 levels of gray for best graphics quality and inserted into full-size scale GIS or CAD files for dimensional accuracy. Gray scale scans are optimized for display and plot quality and include complete post-scan editing and clean up.
Level 2 files are captured in gray scale mode, usually in TIFF, COT or JPG image format, from originals containing black and white lines. Although line-only drawings are generally considered monochrome data, the use of 256 levels of gray ensures the complete capture of all drawing information. Older blue or sepia prints are often faded or darkened in various areas of the print, making information hard to read even to the naked eye, and impossible to preserve as monochrome data.
The
most important difference between a Level 1 and a Level 2 scan is the mounting
of raster images as a background to GIS or CAD files. This offers a complete
and transparent integration of your legacy drawings into your current
vector-based digital workflow. We first create the Level 2 raster image as
described above, but rather than delivering these non-intelligent raster files
alone, we actually insert each one into a vector based frame that
indicates the full-size boundary of your paper drawing. With a Level-2 scan,
you can now open your raster files within your mapping or engineering software
just as any other vector drawing in your project. Since the images are scaled
to real life size, you can take accurate measurements of length and area
directly off the image in full-size, without the need to convert from paper to
vector.
The image itself is
cleaned-up by operator-assisted editing, which may include deskew, crop, erase,
split and merge. De-skew corrects for angular misalignment of the
image. Crop removes unwanted data outside of the document area. Erase
selectively eliminates unwanted pieces of the scanned data, such as undesired
markings on the originals. Split is used to create multiple separate
files from portions of the original scan, and Merge combines all or
parts of several scans into a single raster file, such as matching tiled data
or updating portions of a drawing with additional scans from newer documents.
The
complete scanning
and conversion solution
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