 So we have two different types of LiDAR for lens use. This one is a fixed LiDAR and this one is moving LiDAR. There are different machines, like you can carry with your hand, you can put it inside your head. So depending on what kind, how accurate you want your information, you get to choose what kind of LiDAR you want to use. Because for example, this one, every one second is shooting about more than 20,000. And then this one, maybe 60,000. The other one, maybe 20,000, 3,000, 2,000, depending on every second, how many shots they can make, you have to choose different LiDARs. So it really depends what kind of information you want to collect. Because okay, let's say that, oh, this one for every second, 20,000. Yes, it is a very high-quality information. But the thing is this, to make this into a database, it will take you more time, more money. Yeah. So you have to select the, accurate doesn't mean that it is the best. Depending on where and when, how you want the information, you have to select the different equipments. So actually, this one, okay, this is very accurate information, but it is honestly to tell you, we only use this for very accurate information, like for us to inventory. Because when we are moving, our mountainous is a slope area. So it is difficult, and then one more and then move. And then go here and then move like this. But when we are using for correct information that we use this one, but that one also is suitable for moving in a mountainous and a hilly area. Also, it depends if the trees are very tall or if the, how big the area is, you get to choose what kind of equipment you're gonna use, because there is one that you can carry with your hand and it's only one kilogram. The lighter, like the drone lighter, we also have, but this area, we do have military area. Yes, over there, behind restricted area. So we cannot, we cannot fly. We have to have permission from other governments. So we will show you inside. So I will explain a bit about this and then I will show you how we use it. This one, they bring all the images of the colors. So you see this middle part, it turns like this and it turns like this. So it gets the shapes of the things and the lens, they collect the colors of the things. So when you put this data into the computer, the shape of the thing is collected by this side and the colors are collected by this side. So it gathers up inside the computer with the shape and the color. 130 meter is a distance when we are calculating, when we're taking the 30 meters when we are doing a flat ground. This one takes the length of the tree and this one takes the flat information. So there are models with only one, then that means the information about the length like the height will be not that accurate. We do some settings here. How many times you're going to shoot in one second? So you can select, I only need the shape of and the volume of it, then you can select, oh, this other things I can eliminate. So also this camera, you wanna scan this area one time or two times? So depending on it, maybe it takes one minute or it takes two minutes. They are checking the volume and the shape of us and then the color of the lens. Yes, right now, it's taking picture of us. Then we can calculate the volume of the carbon that's contained inside the tree. We can calculate the volume of it. When they move, it tells us how we are moving and which path we are taking. Now I'm going to make a turn. He's gonna scan all around here. You can see the path where we are moving. This one can collect video information. Video information and volume information, color, volume, video, 360 angle. So we have a lighter inside that I wanna show you. It is about 300,000 USD. And it is because it can take a picture not only from the corona at the top of the corona but also it can, like, it's like a tray. It can see through and even the roof. So depending on what kind of information you need but the later that we have inside, most likely the drone data only can collect information of the volume of the outside. But that one is like see through. Can see through. So can calculate more accurate information Okay. So depending on what kind of lighter we have, we have different ways of using that lighter in the spots. So the first machine, you must use it as a dots and then the second machine you have to use it in a line. We do this kind of analyze too to have the most accurate information. So I wrote a paper about this kind of, the way of how we're using the lighters which is the most correct and efficient way of using it. So as side journal, you can search my name and read the paper if you want. I would like to share this information with you guys, the video that we, when we were scanning inside our artwork behind our institute. If you select the tree, we can move to that tree rapidly. We're going to move and we're going to select the information. So if you click the tree, you can find out how tall is the tree, how thick is the tree in the distance of your heart and where it is located and what kind of treatment the trees have. All this information can be there and we can research it. So this system we do a monitoring for preventing any kind of forest disasters and also for forest health. We have in Korea more than 400 places where we get the information of the meteorology. And then this, the information we collect every one minute and we share this information inside the internet or we share this with the people. Why we give so much information or importance of mythology inside the mountain is because our country, Korea, is covered by mountainous areas. So to prevent any kind of forest disasters, we collect this information. So the basic, there are two big things that we do. The first one is we prevent or we pre-calculate the percentage of forest fire and erosion. This is when this map is for erosion, like we can prevent the erosion, like we can pre-calculate. And then the other one is forest fire. And then the right side is because of the forest fire. So we collect this information as a database for the prevention of forest fire and erosion control. Most likely when we talk about drones, we only have cameras on it. This one that you see inside here is a drone. Drone plus LiDAR sensor at the bottom. Okay. Okay, there are many different kinds of companies that they produce this kind of drones and the one that we saw from outside is LiDAR. And the sensor that you see here, the LiDAR is made from Austria. LiDAR is the name of the company. So this is about $30,000. And but only the drone, that means more than 90% of the cost of that thing is that thing is by because of the camera. Actually, the drone is not expensive. The camera is expensive. We have to be careful when we are flying it. Yes. Why is this LiDAR so expensive? It is expensive because you know why? It is almost to see through. We can see underneath even the root systems, not only the volume. Depending on the budget that you have in every country, you can get to select. And also you have to select the LiDAR camera, depending on the information that you want to collect. For example, if you only need to call the height of the tree, then you can choose a cheaper LiDAR. But if you want, I wanted to select each and every tree and name the trees and collect the information. That is why I selected this LiDAR, which is more expensive than the others. Okay, that, this machine is 3D printer that I have here. She would work on the volume and then the size of it, and then it will print it out. These are information about all different kinds of LiDAR that we have here. And depending whatever you are trying to select the information, you can choose the LiDAR from there. So starting from this year, early May, early March, I started collecting the information of our forest back in our institute. So every tree outside has its name and its number. So we can check the weight, the height, and the size of the chest, the length, and the corona size, and then the crown size, and then diameter is the volume of the crown, and then the tree height. So every tree inside our institute is numbered. So I will show you on a video touching each and every tree and letting you know how tall, how big, how big is the crown. Right now, the Ministry of History and Tourism, they are collecting information of our natural treasures, like tree-natural treasure, and we're collecting the information of these trees. So last year, when we were doing the National Forest in Tauri, we used different kinds of drones, which is the fixed drone, and then blind drone, and drone rider, and iron rider, and moving rider to collect our information. We can cut the branches or we can cut the tree. You can select one by one and get the information, individual information. So depending on every scientist, every scientist can collect this information about what they need. So this information of the trees, we can receive them, the height, and then the length, and so on by Excel and calculate it.