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PLANIMETRIC RESULTANT
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Figure 6: Special Visualization of planimetric discrepancies in
the region of small buildings.
8. CONCLUSION AND RECOMENDATION
The results obtained in this research show that the methodology
presented for the 3D monorestitution of buildings with the
integration of laser scanner data and small-format digital
images is viable and makes it possible to obtain the altimetric
and planimetric accuracy needed to carry out tridimensional
vector mappings in the scale of 1/2000. In the experiments
conducted, 100% of the points tested presented planimetric
discrepancies below 0.8 of the meter. The proposed
methodology may be an alternative to obtain information about
the terrestrial surface, considering the operational facility
existing in the monorestitution and popularization of small-
format digital cameras. Currently, the dependency on laser
scanner survey may be seen as the main disadvantage to apply
the proposed methodology. Research is being conducted aiming
at automatizing the process by developing mathematical
algorithms that improve the selection of scanner laser points
defining the contours of the buildings. The utilization of low-
cost and small-format digital cameras with higher resolution
will increase the performance of the proposed methodology.
The utilization of images with higher spatial qualities will lend
more precision to the identification and reading of point details,
thus increasing the accuracy of the proposed methodology. The
dimension of the area covered by an image taken with a small-
format camera is an important operational disadvantage, when
compared with conventional photogrammetric cameras. In the
future, this disadvantage will be eliminated with the
development and utilization of sensors with higher resolution
based on CMOS technology.
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