DV

If a road has been surveyed using the Roadshow digital video system; an inventory
database can be populated with inventory items and attributes directly extractable
from the digital video.

The interrogation/extraction software is simple to operate and the outputs are in
standard database format, making the outputs compatible with most GIS & PMS
packages in use today (HAPMS, UKPMS, Confirm etc). The viewing and extraction
software can be operated on a standard multimedia PC running Windows 95, 98,
2000, XP & Vista.

The system gives instant access to high-definition; geospatially referenced digital
images (up to 2560x1080) with assets selectable from a list, from a map, by grid
reference or from node referenced chainage. The required descriptions and
parameters are stored in a format compatible with RMMS. Output data formats are
client specified and to date we have successfully exported to Exor, Confirm, HAPMS
& UKPMS.

The positional accuracy of the extracted information can be given to +/- 2m in
chainage, which can be reduced to sub-metre accuracy through the use of DGPS. In
terms of the on screen measurement facility, this can measure the dimension and
height/width of inventory items to within 10% accuracy. Features such as signs,
bridges, carriageways, footways, culverts, line markings, lamp posts and traffic
islands can be extracted from the digital video footage and the relevant information
stored by way of a user-friendly digital data input form.

Roadshow Inventory Survey Procedure

DGPS referenced digital video data collection uses between one and five;
high-definition, progressive scan, digital video cameras to provide the following:

High-Definition (HD) digital video images of at least 1920x1080 resolution collected
to achieve the necessary balance of high-resolution imaging for inventory purposes,
whilst ensuring that each frame can be interrogated as a whole single image in its
entirety on a standard resolution monitor.

The high-definition digital video images are spatially referenced every 2 metres with
accompanying GPS positions ‘stamped’ on them. This will is achieved by using a
combination of Trimble DGPS and an optical distance measuring device, which is
used for the purposes of dealing with any potential signal dropouts in built up areas.

The use of sophisticated lighting filters ensures that issues such as bright sun light
and dull grey weather will not have a detrimental affect on image quality. Surveys
are planned in such a way, so as to ensure that during data collection, as far as
possible, the sun will remain behind the vehicle and that the primary view (forward)
will be unaffected in any case.

The video images are provided in a proprietary format known as VJPs (Video Jpegs)
and these are optimised for interrogation, image-enhancement, zooms, random
access to maps etc. They are viewable on any standard Windows running PC with
no need for any specialist hardware. The interrogation software that the video
images are provided in is absolutely LICENSE-FREE, so you will not be
locked/limited by furtive and expensive software licensing issues.

Having continuous running high-resolution digital video frames at 2 metre spacing,
ensures that in-frame measurements and booking of inventory items can be done
close in the field thus ensuring greater accuracy. Measurements are only
recommended to a maximum of 10 metres into the field; and this ensures that
locational accuracy will be within a metre and dimensional measurements to within
10%.

The video images are supplied in our latest interrogation interface (video browser)
which is the fully-interactive, multi-functional RoadShow Inventory package (a map
based user friendly package which enables detailed interrogation of the video –
Demo disc available on request).

As well as displaying the video frames in 4 different sizes; from thumb nail to full
resolution, it allows high-speed playback (equivalent to 200 mph) or a slow
methodical frame by frame playback for the purposes of detailed analysis. It
incorporates both line measurement and point to point measurement tools along
with image enhancement/sharpen, smart zoom and ‘flip-reverse’ feature. The
interrogation and extraction tools are simple to operate and the outputs are in
standard database format, making the outputs compatible with all GIS & PMS
packages in use today. Once the standard CSV database has been populated then
the specific export takes place, directly uploading the information to the particular
PMS.

The client may either choose to use its own inspectors to extract data from the
video or alternatively use our bureau service to undertake the extraction and
populate the inventory database.

We have a fleet of 6 dedicated survey vehicles and have a proven track record of
delivering large projects on time and within budget. Collecting the data, processing
it and presenting it in our own license-free bespoke interrogation software. We have
an in-house bureau service for extraction of inventory data and extensive
experience in working with GIS and PMS systems.