The ADAM PROMAP ORTHO System 2
is a precision photogrammetric scanner and orthophoto rectification upgrade kit
that can be installed into any ADAM Technology PROMAP. With this kit installed
the PROMAP can simultaneously scan and orthorectify images at resolutions of up
to 8 microns per pixel with a geometric accuracy of better than 3 microns RMS.
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now. We are confident that the Promap Ortho System 2 offers a unique 'hybrid' solution for the mapping industry. View our Promap Ortho System comparison to softcopy systems and see for yourself.
- Cost-effective orthophoto production
- Ortho rectification during scanning in one
- High speed scanning
- Optical scan pixel size adjustable by the
operator to any size between 8 and 30 microns
- New ORTHO System 2.1a Software
- Improved image capture quality with adjustable settings to maximise output.
- New on-the-fly colour correction facility which can also be applied to existing scans.
- Intelligent "Dust removing"
- Increased Accuracy through the use of improved Geometric Calibration software.
- Support for overlaying ADAM 3DD 3.1 vector
data and sheet files.
|Figure 1. ORTHO System 2
system inside a PROMAP
The ORTHO System 2 is unique
in that the scanning and orthophoto rectification is done in a single step.
Only the final ortho image is ever stored! There is no need to scan and store
all the intermediate image files that a softcopy system would require, nor to
scan areas of the image that will not be used in the final orthophoto. However,
if you do need to produce digital images for a softcopy system, the ORTHO
System 2 is more than capable. The optical pixel size can easily be set by the
user to any value between 8 and 30 microns within minutes, and the software can
also resample to any pixel size you require.
Improved functionality ensures
that the ORTHO System 2 meets the needs of a mapping organisation looking to
maximise productivity. The ORTHO System 2 is an Analytical Stereoplotter,
Photogrammetric Scanner, and Orthophoto Generator in the one instrument. This
combines the best of both worlds -- orthophoto generation and the no-compromise
data capturing abilities that only a high-quality analytical stereoplotter can
The integration of analytical
stereoplotter and orthophoto "machine" ensures that only minimal
operator training is required. With the ORTHO System 2 you maintain control
over your work-flow and over the quality of your work. On the one instrument
you can easily and efficiently produce DTMs from the original diapositives and
then scan and create the orthorectified images within minutes, at the pixel
size you desire.
The ORTHO System 2 supports
the following file formats for DTM/DEM data import:
- ADAM 3DD MAF
- AUTOCAD DXF
- ASCII XYZ
The ORTHO System 2 also comes
complete with a full image editing package that supports all major image
formats including TIFF and JPEG, allowing you to use the generated images with
any 3rd party products. In addition, the ORTHO System 2 integrates with ADAM
3DD 3.1 allowing you to overlay symbolised vector data generated by 3DD over
the top of the scanned ortho image for printing to any Windows-supported
printer, including Postscript printers.
Model area scans
One of the unique features of
the ADAM PROMAP ORTHO System 2 is the fact that the complete
orthorectification occurs during scanning. On a softcopy system,
entire images are scanned and stored, requiring nearly 2.4GB of storage
each at 8 microns, or close to 700MB at a more typical 15 microns.
Later, pairs of these images are loaded for observations (DTM generation, for
example), and then portions used for the final orthophoto.
The ADAM PROMAP ORTHO
System 2 works differently. The PROMAP is a first-order analytical
stereoplotter that allows observations (such as the DTM) to be obtained
directly from the highest-resolution medium available, the original
diapositive. No scanning and transferring of images is required. Once the DTM
has been captured, the operator only needs to scan that portion of the
currently-loaded image that will be used in the final orthophoto. Typically
this will amount to just 28% of the total area of a given diapositive (40% of
the width and 70% of the height). As it is being scanned, the ORTHO System
software orthorectifies it on-the-fly, with only the final orthorectified image
being written to disk. This results in tremendous savings in both time
and storage requirements, and makes the following timings even more
attractive when they are compared with those of dedicated photogrammetric
Table 1. Model area
Full image scans
Of course, the ADAM PROMAP
ORTHO System 2 can also be used as a photogrammetric scanner if required, and
performs exceptionally in that role as well:
Table 2. Full image
||1GHz Pentium III
"Model area" is
assumed to be 28% (40% of the width and 70% of the height) of the total area of
a 230mm x 230mm diapositive. This would be the normal area of an image scanned
for an orthophoto. "Full image" is an entire 230mm x 230mm
diapositive, and would typically be used for other purposes.
refers to both optical pixel size and output pixel size. The software can
resample the images to any specified output pixel size.
All times include full
orthorectification and gamma-correction of the image data and writing of the
image data to disk.
Pentium III times
supplied by a customer and are approximate only.
Improvements over the original ORTHO
ORTHO System 2 is three
to four times faster than the original System. The increases in speed of
scanning and Ortho creation are due to:
New digital CRI Macro*Color filter with no moving
parts. This is an optical filter which is electronically tunable in under 1 ms,
with no moving parts or vibration. It switches between the three primary colors
to generate the RGB color set. By taking sequential images at each filter
setting, a color image is obtained with full color information at each pixel.
This triples the image resolution compared to a conventional color CCD camera,
where the detector is "painted" or "striped" to record only
one of the three colors per pixel. The Macro*Color image registration
between color planes is perfect, eliminating color aliasing and improving
reproduction of edges.
Variable optical pixel
size allowing the user to select the optimal balance between speed and
resolution (quality) of the job.
ADAM Technology recognises the difficulty of maintaining a perfectly clean
system in a real production environment. ADAM have therefore designed
intelligent dust detection and removal techniques applied during calibration to
ensure the images you scan are free from so-called "electronic" dust
and other defects. In addition, thanks to the new colour filter and improved
illumination system, the ORTHO System 2 also produces higher quality images
with a better dynamic range.
ORTHO System 2 now supports breaklines. These are lines that triangles are not
permitted to cross. They simplify the processing of bridges, dam walls, etc. --
any feature with a radical change in height. Simply digitise a line at the top
and at the bottom of the area that you wish to isolate and ORTHO System 2 will
take care of the rest.
calibration. The geometric and radiometric calibrations are now largely
automatic, to improve both speed and accuracy. The geometric calibration also
now uses an intelligent centroiding algorithm to detect the centre of the
target very accurately.
ORTHO System 2 now integrates cleanly with ADAM 3DD 3.1, giving the user two
Support for 3DD 3.1 sheet
files. ORTHO System 2 can be launched directly from the 3DD 3.1 menus to
display symbolised sheet data over the top of the Ortho image, ready for
printing or storing as Postscript.
Support for 3DD vector
data. After digitising a DTM, the user can do a quick scan of the model area
and then, simply by selecting an option from the 3DD 3.1 menus, overlay the
digitised vector data over that image at any time. This assists in checking for
job completeness and accuracy checking.