Traditional
database queries are characterized by difficult constraints in processing of
choice queries and slow reaction. Data partitioning is a powerful mechanism for
improving efficiency of records management systems, and it is a well-known
characteristic in contemporary database systems for better management and
planning.
And
among all the industrial applications, LIDAR (Light Detection and Ranging) - a
remote sensing method is among the emerging scientific application in the Geo-spatial industry. With the fast improvement of GIS, the studies of spatial
studies is developing dramatically each day in producing three dimensional
information about the shape and its surfaces characteristics. LIDAR systems
allow scientists and mapping professionals to examine both natural and man-made
environments with accuracy, precision and flexibility.
The
Airborne LIDAR (Light Detection And Ranging) is an active system based on a
laser sensor that can be installed in airplanes or helicopters. This technology
is increasingly replacing methods based on photogrammetry to obtain high
precision Digital Terrain Model, because it manages to reduce the costs and
deadlines of delivery at the same time better accuracies in height and greater
Measurement density.
The
Mobile Laser scan LIDAR too has played a vital role in the sensor technology.
The best features of mobile sensors is helpful in acquiring data from complex
terrains and scenes because of its flexible platforms such as cars or vans, train,
boats or any other backpacks.
TNG
offers the following solutions and services in LIDAR (ALS and MLS):
DATA CLASSIFICATION:
The
classification allows the end user to have a categorization of each point based
on its nature (soil, vegetation, construction, etc.). One of the most
interesting features of the LIDAR is that it allows capturing multiple returns
for each pulse issued. For example in forest areas you can capture the top of
the trees, part of its structure as well as the soil. Once processed and
classified the data can obtain Digital Surface Models (DSM) that contain all
the elements by above the ground and also Digital Terrain Models (DTM) that
contain only the soil. The difference between both models allows us to obtain a
map with the heights of the elements that are above the ground (usually
vegetation and buildings).
DATA FILTRATION:
The
flight survey differs from one year to another of the same area and the
generated digital surfaces from two models are to be subtracted. This
subtraction undergoes a filtration, classification and vectorization process to
get a map of changes. Finally, each exchange room is characterized with
attributes that contemplate its area, difference in height, volume and
situation administrative with respect to layers of information.
Technology we use:
- Microstation
- ArcGIS
- QGIS
- AutoCAD