Present images from UAV were used for ortho-mosaic

Present
land surveying techniques which are currently used in India require more
humans, more time and costlier instruments in order to measure the area of
particular land 1. To reduce these limitations authors proposed concepts of
“land surveying using quad copter and GPS”. To measure the area of a given
land, the quad copter will be travelled to the starting point of the land; this
can be any point on the edge of the land which has to be surveyed. Location of
that point will be capture in terms of latitude and longitude coordinates. The
data from the GPS module is transferred to the ground station through ZIG-BEE
transmitter and receiver. The overall Project was carried out to reduce the
cost and make human efforts less in surveying the land, which is achieved
through this project. The idea of using quad copter and GPS got for the
proposed system. By using quad copter, we will be able to capture the image of
plot and by using image processing technique; we can easily calculate the area.
And the GPS can be used for controlling the moving vehicle.

The unmanned vehicle is ‘quad
copter’, where the quad copter is used for taking highly overlapped photos of
the area of interest 2. The generated photo of area undergo further process
like digital models, digital terrain model and access volume of various
materials. System uses them to get information from places which cannot be
easily (or safely) accessed, like highways or rocky cliffs. Since the
measurements do not interfere with traffic of work processes, we can use low
altitude photo-grammetry to offer elegant control measurements of quarries,
landfills, highways or roads. Calculations given are much tougher. Idea got-The
low altitude photos can used for calculation of area, at a specific interval of
time using UAV.

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The images from UAV were used for
ortho-mosaic and digital terrain model (DTM) generation, thus allowing for
high-resolution landslide monitoring 3. Several new open source image- and DTM processing tools are now providing a complete
remote sensing working cycle with the use of no commercial hard- or software.
Public domain image processing tools for low-cost ortho-rectification and
mosaic blending were used. A couple of public domain image processing tools for
low-cost ortho-rectification and mosaic blending were used.

The purpose of surveying robot is to
streamline a series of work at sites, such as transportation and setting of
surveying equipment, surveying, the recording of coordinates data, to achieve
labor-saving and high efficiencies in surveying work 4. They can move across
an up-and-down site with all equipment necessary for surveying including a
total station, a precise instrument, loaded on them. Errors caused by man in
reading and writing coordinates data are eliminated, and coordinates data can
be prepared efficiently at the site office. Aiming at labor-saving and
improving efficiency in surveying work, 
developed surveying robot that carries out at sites transportation and
installation of surveying instruments, surveying, recording coordinates data,
treating and managing coordinates data at the site office. Here from this
project we took the idea of surveying robot as a sketching robot. Instead of
having the surveying equipment on it, we try to move the sketching robot
throughout the plot, for measuring the land area. With help of these sketching
robots, the points to be measured are plotted and calculate area.

In this system it is shown how a UAV
system can be built at low cost and the main focus of this contribution is on
the generation of 3D point clouds 5. In this system it takes the 3D picture
of land and the calculating the area. This system gives the accurate
measurements and this system is used for the troposphere survey. The
calculation of area is completely depended on the software used and unmanned
aerial vehicle is used for capturing the points. Advantages; the existing
system provides accurate measurements. And the software used provides all the
correct measurement. This existing system helps us the measuring easy to do the
measuring easily. And the idea of capturing images.

New applications in the short and
close range domain are introduced, being the UAVs a low-cost alternative to the
classical manned aerial photogrammetric 6. 
The UAVs are capable of photogrammetric data acquisition, SLR digital
cameras, can fly in manual, semi-automated and autonomous modes. It has an
ability to quickly deliver high temporal and spatial resolution image
information and to allow a rapid response in a number of critical situations
where immediate access to 3D geo information is crucial. Fast data acquisition,
transmission and no runway area is required. Especially, in case of large scale
projects and non flat objects (e.g. buildings, towers, rock faces, etc.) the
same task becomes much more complex in case of 3D objects requiring convergent
images and, maybe, vertical stripes.

Distance measurement is a basic
operation that every surveyor must be able to perform with the tools available
7. For large property dealings its take much more time to measure the
distance between two points. To avoid this tiring procedure of area calculation
that involves separate side measurement, carrying of the equipment and sending
the obtained side to total station, they incorporate Survey robot which
combines all these features. In other words, it performs three most important
tasks. Firstly, it can be freely moved about the plot when given a desired
direction. Secondly, it obtains the length of any desired plot as it moves and
transmits the length. This transmitted length is stored in the PC and then an
area measurement module is used to find the area. Thirdly, if the user wishes
to subdivide his entire plot then we just need to program the Survey robot
appropriately and the subdivision of plot is done in a very less duration.

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