Using GPS in Land Surveying

Land surveying is a profession that greatly utilize the GPS system.

ladn surveyingToday, man-made constellations are in orbit. Their purpose is to provide instant, exact and global positioning information. This global positioning system of GPS is revolutionizing the modern construction sites, automating and guiding land surveying equipment, providing instantaneous circles and volume gap, simplifying total and controlled surveys. Nearly everyone involved in the land surveying and construction industry has heard something about satellite positioning technology or maybe you or someone you know is already using it. Whether an operator or a casual observer, there are still many questions about how this exciting system really works.

These positioning satellites don't stay in one place like the stars; they orbit the earth about twice a day. Constantly transmitting uniquely identified radio signals that can be perceived by specialized units on earth. These signals are used to precisely measure the distance to the receiving instrument from each satellite visibly overhead.

Just as stars have exact locations in the sky, the locations of the GPS satellites are also defined, becoming orbiting reference points. Using a process based on triangulation, a GPS receiver processes the signals from multiple satellites to compute an accurate position on Earth, which is why it is widely use in land surveying.

For mobile applications that require high accuracy, such as three dimensional machine control, there are two requirements that must be met. First, the signals from a minimum of five satellites must be received at all times. And second, those five satellites must be distributed across the sky. This is called Dilution of Precision or DOP. The simple rule of thumb is this, the more satellites received the better your system will perform.

land surveyingAll land surveying receivers incorporate standard GPS tracking technology; unfortunately the GPS satellite constellation alone cannot continuously make the minimum requirement of accurate mobile positioning. For any given location, there are times in a day when there are less than five available satellites or very poor DOP.

Now, consider a land surveying job site with trees, buildings, or other obstructions when satellite receptions are easily be further reduced. All land surveying GPS receivers suffer this same problem because they all use the same satellites to operate.

Even the planned signal modernization to the GPS satellites won't solve this problem. An obstruction that blocks one signal blocks all signals from that satellite. A land surveying equipment provider has solved this problem. The solution isn't adding more signals from the same satellites; it's adding more satellites.

Today, there is a second positioning satellite constellation in operation, the Glonass System. This positioning system is operated and maintained by the Russian government; much like the GPS is operated and maintained by the United States government; combining these two satellite constellations give land surveyors access to 38 different satellites; 14 more than a GPS-only system.

The additional satellites mean stronger and more accurate positions and better performance in obstructed land surveying areas. These additional satellites mean maximum up time in all land surveying locations, in all conditions.

For an up to date and accurate land surveying service, contact Wetumpka Land Surveying at (334) 472-9606 or better yet, you may fill out our contact form request and a licensed land surveyor will contact you. 

Land Surveyor Settles Worldwide Land Disputes

land surveyorA land surveyor may not be recognized as much as a doctor or a lawyer, but no one can dispute that they play a very crucial role on Earth.

As proof, several countries all over the world have unsettled land disputes over other countries. Some may have been settled through the International Court of Justice, Treaty conditions, or a claimant country’s sovereignty has been recognized. And of course, these were all settled with the help of a land surveyor.

Let’s take a look at some of the famous land disputes all over the world settle by a land surveyor:

  • Mayotte (Africa) – Claimants are France and Comoros. France gained full control under the 2009 referendum, the population supported an overseas department of France, and so became one on March 21, 2011. 
  • Ligitan and Sipadan (Asia) – Claimants are  Malaysia and Indonesia. The 2002 International Court of Justice ruling awarded both islands to Malaysia, but left unsettled the maritime boundary immediately southwest and west of the islands between Malaysia and Indonesia.
  • Eastern coast Narva and Petseri County (Europe) – Claimants are Russia and Estonia. Russia recognized them as a part of Estonia with Treaty of Tartu, 1920. After the fall of the Soviet Union, Russia continued administering it.
  • Tuzla Island and Strait of Kerch; Sarych (Europe) – Claimants are Ukraine and Russia. The conflict arose in 2003 when the Russiam authorities started to build a dam towards the island. Since then Ukraine established a border garrison on the island for a closer surveillance. The reason for the conflict is the fact that Tuzla island strategic location gives Ukraine full rights over the main channel in the Strait of Kerch and, this, the access to the Sea of Azov.
  • San Andres and Providencia (Central America/ Caribbean) – Claimants are Colombia and Nicaragua. Colombia currently has full control because Honduras de facto recognises Colombian claim.
  • Los Monjes Archipelago (South America) –  Claimants are Venezuela and Colombia. Velenzuela gains full control because Colombia no longer claims the islands, only the surrounding water.

A piece of parcel is something that signifies power and resources thus many countries fight over it. If big countries have unsettled disputes over a piece of land, small land disputes also happen between siblings, husband and wife, and neighbors. Though you can’t hire a land surveyor from an International Court to settle your small land disputes, you can always hire a local land surveyor who can survey your property and resolve any encroachment claims and/or equally divide a property as mandated by law.

A land surveyor plays a very vital role in settling land disputes, big or small. If you are in a situation that you may need the expertise of a land surveyor, please contact Wetumpka Land Surveying at (334) 472-9606 today or go to our Contact page and send us an email.

The Importance of Land Surveying in the Modern World

land surveying

Most of you have probably never thought about land surveying until you needed it at some point. Many of us hear about land surveying all the time but never really give it much thought.

Since an investment in land and/or a home will likely be the largest investment you will ever make in your lifetime, knowing where your property lines are becomes very important indeed.

The art of land surveying was developed centuries ago. In fact, it’s one of the oldest professions in the world. The fact that it was used by man at such an early time and is still being used now shows how important surveying is to our survival.

Surveying land has many uses. Boundary surveying, for instance, allows you to know where your property corners or property lines are. This is especially helpful when disputes with a neighbour or with other people arise in terms of where your property ends.

If your family wants to divide a tract of land and transfer ownership to other family members, a boundary survey is the first step to do so. If you’re having a building constructed, it is very important that you have the land surveyed to make sure that you are not encroaching onto other peoples’ property.

A mistaken building location is very expensive to fix so you might as well invest in a boundary survey to prevent this.

“Land Surveying saves money, time, lives, and properties”.

A topographic survey, or topo survey for short, is another important type of land surveying. A topo survey is done to locate natural and man-made features on a particular parcel of land.

A topographic survey is different in that the elevation of the land is surveyed which means it can show man-made underground features, retaining walls, utility lines and etc.

Before you start any kind of construction activity, it’s important to have a topo survey done in the area so they’ll have an accurate record of the land’s existing conditions. Yes, that spot with the new mall in the neighbourhood had to have a topo survey done first.

Now, a flood survey or flood determination – this is very important too. It isn’t evident just looking at a property whether you are at risk of flooding or not. And, in some cases, even looking at the flood maps doesn’t give you an accurate answer.

The flood survey determines the elevation of the home and compares that to the base flood elevation. This is the only way to be sure you’re not in a flood hazard zone. If you’ve just been told that you live in a flood-prone area, having that confirmed by a professional land surveyor would let you know how to best proceed.

When getting flood insurance, insurance companies would require an elevation certificate from you. A land surveyor would be able to assist you with this.

If a company wants to invest in another state, or if there is a national lender on a commercial project, they will likely need an ALTA Land Title Survey done before anything is constructed. An ALTA Land Title Survey is a lot like a regular boundary survey except that nationally accepted ALTA Standards are used to guide the surveying effort.

Land surveying standards vary widely from state to state and an ALTA Land Title Survey is used to cut down on this variation. Also, an ALTA Land Title Survey typically is more involved than the state standards variety.

Because of this, an ALTA survey can be more anywhere from 50% to 200% more expensive than using the state standards only. If you need this type of survey, I suggest seeking an experienced land surveying company who is familiar with these additional requirements.

In summary, there are many uses for a land survey and for seeking the services of a land surveyor. If you’re unsure of your situation, consult Wetumpka Land Surveying at (334) 472-9606 today or go to the Contact page and send us an email.