Sunday, July 21, 2019

5 TIPS FOR SUCCESSFUL DRONE MAPPING


How to start a successful drone mapping business 




Satellite imagery is fairly cheap these days. But it may be
weeks or months old, and the image resolution is often too low
for detailed analysis of a specific site. And when it comes to
the other alternative of capturing images from manned aircraft,
drones often come out on top.
“Drones have a lot of advantages over manned aviation for
mapping,”  a cloud-based service that offers image processing
and analysis by subscription. “Drones are cheaper, quieter,
better for the environment, and they can fly lower, which means
you can get better end-quality on images



HOW IT WORKS



Using images to create accurate ground measurements, a process known as photogrammetry is a little more complicated than capturing a video with whatever camera you have on hand.

“ A mounted camera lens pointing straight down captures the perfect view of the ground directly beneath it. But the angles change the farther it gets from the center of the image, warping
measurements of the distances seen below. What you need is something like Google Earth. No matter where you are looking on a Google Earth image, it’s presented so you are always looking
straight down.



That’s because it is orthorectified — it has a constant scale, without changes in image perspective.
To do this, aerial photographers (manned or unmanned) fly back and forth over the terrain, taking hundreds or thousands of overlapping photos. These are stitched together into a single
image, known as an orthomosaic, which flattens the Earth and represents the true distances between ground points.




Software by companies such as DroneDeploy and Pix4D takes a series of photos as inputs, looks for points of overlap to align and outputs a single orthomosaic image. This process can take hours. Mapping software can also generate 2- and 3D models, as well as a “point cloud,” a series of 3D coordinates that allows for accurate measurements of distance and height. For surveyors and many other clients interested in aerial imagery, location really matters. To make sure images are as accurate
as possible, most practitioners use ground control points.


5 QUICK TIPS ON STARTING A SUCCESSFUL DRONE MAPPING BUSINESS

1)  Educate yourself: “You may be a great pilot, but you have to understand the basic
concepts of geodesy(the mathematical measurement of the earth) and geospatial
technology as well,” omkar says. Academic training isn’t essential, but the several-day workshop would be helpful. “Pix4D will spit outa product regardless of the quality of what you put in. And when you hand that to someone and they say, ‘This is 30 meters above what it should be,’ that’s not a good feeling.”


2)  Learn your market: “I spend a lot of time talking to companies, interviewing project managers, and finding out their needs,” omkar says. Someone said adds, “Customers need to know how aerial
data can be used, and understand the potential of drones. They aren’t a novelty— they are a way to
lower their overhead costs.”


3)  Abide by the law: “All this data that you are collecting is time- and date stamped notes. If the DGCA   comes in a few years and asks to see your flight logs and waivers, you could be facing some fines or more if you offer services illegally.


4)  It’s all about the overlap Getting proper image overlap is crucial. “The more points the software can tie together, the better your final result will be. I always recommend an absolute minimum of 75% overlap, and I usually go with 80%. That makes the mission longer, but the end result is usually
worth it.”

5)  Make sure your camera is dialed in: There is a process for calibrating your camera for
surveying, Learn the specifics for your camera and software, and that will make a
big difference.

if you like to read such blog please click follow button above.!!!
thanks for reading.

No comments:

Post a Comment