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land surveyor, geodetic engineer, geodetic services, surveyor, geodetic survey, topographic survey, relocation survey, surveying, land surveying, aerial photogrammetric survey, hydrographic survey, 3d asbuilt, best geodetic engineer philippines, aerial lidar, LIDAR

Aerial Lidar Surveys

IS THERE A FASTER WAY TO GET DETAILED TERRAIN AND TOPOLOGY AS WELL AS EXISTING STRUCTURES IN A WIDE STRETCH OF LAND OTHER THAN TRADITIONAL SURVEYS ?

The client wanted to design a structure that would pass through a highly urbanized area. They needed a detailed as-built and topographic survey so that they could generate the most economic and feasible design possible for their structure. They had us perform an aerial LIDAR survey to obtain accurate horizontal and vertical positioning of all existing features on site. About 150 hectares of data was obtained and transformed into a Lidar Point Cloud. What would normally take about 3 months of traditional survey works in the field was done in about two (2) hours of Lidar 3D Mapping in the sky.

HOW IS IT USEFUL ?

  • Digital Elevation Model (DEM): Measures the elevation of points and generates a digital terrain model of the tract of land.

  • Utility Mapping: Can be used to show utilities such as power lines, poles and above ground pipes.

  • As-Built Maps: Elevations of structures could also be derived from the Lidar Point Cloud.

  • Speed: Ideal for large tracks of land that needs to be surveyed for a short period of time.

  • Agriculture: LIDAR helps the farmer to find the area that uses costly fertilizer. LIDAR can be used to create elevation map of the farmland that can be converted to create slope and sunlight exposure area map.

  • Forest Planning and Management: It is used to measure vertical structure of forest canopy and also used to measure and understand canopy bulk density and canopy base height and peak height to estimate its root expansion.

  • Flood Model: River is very sensitive and few meter of change in information can bring disastrous or loss of properties. So accurate extracted LIDAR information can be used for the 3D simulation for better planning of the structures or buildings on the river bank.

  • Transport Planning: As LIDAR are highly accurate technology it helps to understand width, elevation and length of the existing road.

  • Mining: It is used to measure the ore volume by taking series of photos of ore extraction space. These interval photos are used to calculate the volume.

  • Wind Farm: LIDAR is used in the wind farm to calculate the direction and strength of wind. LIDAR attached to the turbine helps to change the direction of the blade to generate more power.

  • Urban Municipality: It helps municipality to know where things are and what are the changes happened in the city.

  • Railway Infrastructure: Traditionally railway track measurement was done by regular survey system. Now LIDAR can quickly perform the measurements of the railway track and the topographical and surrounding area of the railway path.

  • Airport Infrastructure: Used to capture features in the airport like runway, terminal building that allow airport authority to manage and operate airport system smoothly.

  • Mining: LIDAR is also used in the mining business in various task. It is used to measure the ore volume by taking series of 3D laser measurements of ore extraction spaces. These measurements would then generate a 3D surface in which data such as cavern volume could be extracted. It could also be used to get mine cross-sections for liquid flow analysis.

  • Wind Farm: LIDAR is used in the wind farms by generating a DTM (digital terrain model). The model is then used to determine the most ideal places to set turbines by calculating the direction and strength of the wind passing through the terrain.

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