How We Update OBM Maps
Overview
DART will fly the areas to be mapped either
with its 40 foot helium filled blimp camera platform or plane based
platform, depending upon the size of the areas to be mapped.
Ground control for the photography is
typically established using Trimble GPS. Control is established, in
the instance of a new subdivision, at road intersections. A minimum
of three control points are required. DART usually uses 5 control
points.
Photographs are obtained with our ROLLEIMETRIC
photogrammetry system. Click
here to review in detail the process of
our photogrammetry system.
The aerial images are scanned, and using the
ROLLEIMETRIC CDW software a computer model is created of the area.
Features are mapped by drawing on the photographs (for example the
homes) and the software calculates the X,Y, and Z co-ordinates of the
feature. For a typical survey, an accuracy of 10cm to 20cm is
achieved. This is increased or decreased depending upon end user
requirements.
DART has the unique ability of providing a
level of accuracy that you request, so you pay for only what you
need. Unlike tradition techniques (ie total station survey) that have
an accuracy that is simply provided, DART offers a level of accuracy
you need to save you even more money. Considering that typical OBM
mapping has an accuracy in the range of metres, DART improves the
accuracy your mapping.
DART provides both digital files in real world
co-ordinates (your choice of format) of the mapping, and colour or
B&W prints. We'll even install the mapping on your computer
system or GIS.
Contact us and get a quote today that will
impress you.
Tell me about the costs.
OBM Updates