What is DGPS Survey and How Does It Work?

Have you ever wondered how people measure land so perfectly before building a road, house, or bridge? That job is done through a process called DGPS Survey. It helps surveyors find the exact location and shape of land areas.

Let’s learn in very simple words what DGPS Survey is and how it works.

What is DGPS?

DGPS means Differential Global Positioning System. It is a better and more accurate version of the normal GPS that we use in mobile phones or cars.

When you use regular GPS, it can tell you where you are on Earth, but sometimes it can be a little wrong. It may be off by five to ten meters. That is not a big problem when you are looking for directions. But for land measuring, this is not accurate enough.

This is where DGPS technology helps. It gives very accurate results and makes sure the position is correct within a few centimeters. That is why it is used in construction, land mapping, and many important projects.

What is DGPS Survey?

A DGPS Survey is the process of measuring land using DGPS technology. Surveyors use DGPS machines to collect correct data about the shape, size, and boundaries of land.

When builders want to construct roads, buildings, or other projects, they must know the exact points where to start and end. A small mistake can cause big problems. That is why a DGPS Survey is done first. It helps in planning and designing correctly.

How Does DGPS Work?

Let us understand the DGPS working principle in a very easy way.

DGPS uses two devices to work.

The first device is a base station. It is placed at a known and fixed location. This device knows exactly where it is on Earth.

The second device is a rover, which is used to move around and measure land.

Both devices receive signals from satellites in space. These signals help the devices know their location. But sometimes, the signals are not perfect and may have small errors.

The base station compares the real location with the location received from the satellite. Then it finds the difference and sends correction information to the rover.

This correction helps the rover to find the exact and accurate position of land points.

This is how DGPS technology gives better results than normal GPS.

Difference Between GPS and DGPS

Many people ask about the difference between GPS and DGPS.

GPS is the regular global positioning system that we use on our phones. It gives location using signals from satellites. But it is not always very accurate. It can have mistakes of five to ten meters.

On the other hand, DGPS is an improved system. It uses two devices and corrects the errors in satellite signals. This gives much better results, with an accuracy of a few centimeters.

So, GPS is good for regular use, like directions. But DGPS is needed for land surveys where accuracy is very important.

Importance of DGPS in Surveying

Surveyors use DGPS in surveying because they need to be very precise. When you build something like a road or building, you cannot guess. You need to know the correct place to dig, build, or plant.

DGPS in surveying helps in the following ways:

• It gives very accurate location information

• It saves time by collecting data faster

• It reduces the chances of mistakes

• It makes planning and designing easier

That is why almost all big projects start with a DGPS Survey.

DGPS Accuracy

One of the biggest reasons to use DGPS is its accuracy. Normal GPS can be wrong by a few meters. But DGPS accuracy is much better. It can measure locations with less than one meter of mistake. Many times, it is correct within ten centimeters.

This high level of accuracy is very helpful in engineering and land development projects.

Satellite Based Positioning

DGPS works with the help of satellites. This is called satellite based positioning. Satellites are always moving around Earth in space. They send signals to the ground. The DGPS devices use those signals to find their location.

Without satellites, we would not have GPS or DGPS. That is why satellite based positioning is very important for modern surveying and navigation.

Land Survey Using DGPS

A land survey using DGPS is when surveyors use DGPS machines to measure land. They walk around the area with their DGPS rover and collect data about every corner, slope, and height.

After collecting the data, they use computer software to make maps and reports. These maps help engineers and planners understand the land and start their work in the right way.

Many governments, companies, and engineers use land survey using DGPS to plan their projects.

DGPS Advantages

There are many good things about using DGPS. Here are some main DGPS advantages:

• It gives more accurate results than regular GPS

• It is perfect for big construction and engineering projects

• It works in remote and difficult areas

• It helps save time and money by reducing mistakes

• It collects digital data that can be stored and used later

Because of all these advantages, more and more people are using DGPS Survey for land measurement.

Using Drone in Survey

Nowadays, many survey teams are also using drone in their surveys. A drone is a flying machine that can take photos and videos from the sky. When drones are used along with DGPS technology, the results are even better.

Here is how using drone helps in surveys:

• Drones can cover large areas quickly

• They can fly over hills, rivers, and hard places

• They take high quality pictures from the air

• They help make 3D maps and models

• They save time and effort of the survey team

So, using drone along with DGPS Survey is the future of modern surveying.

Dronitech – Experts in DGPS and Drone Surveys

Dronitech has an experienced land survey team with more than ten years of surveying experience. They provide complete DGPS Survey services, Total Station surveys, and drone-based mapping solutions.

Their goal is to deliver correct and trusted survey data for all types of infrastructure work. Whether it is a road, bridge, building, or tunnel, Dronitech’s survey team makes sure you get the right data to start your project with confidence.

Final Words

Now you know what a DGPS Survey is and how it works. It is a special and accurate way to measure land. It uses DGPS technology, which is better than regular GPS, and gives exact data using satellite signals and correction methods.

DGPS in surveying is used in many big projects like roads, railways, bridges, and buildings. With its high accuracy, digital data, and smart features, it is the best choice for modern land surveys.

And when you combine it with using drone, the survey becomes even faster and better.

So next time you see land being measured, you will know that it might be a DGPS Survey, working behind the scenes to build a better future.

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