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Contact Details

Please feel free to contact us:

(For Quotations, please email us the relative details including the locations in Google Earth if possible)

 

083 268 4776

dvd@vdsurvey.co.za  

Jamaican Music, Mooikloof, Pretoria

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3D Models and Volumes

https://www.youtube.com/watch?v=sk5MUkIgG-E

Site overview

https://www.youtube.com/watch?v=hhjCL7D77fI

 
 

Case studies

  • Flood line determination over a large area

    The main problem with this project was that access to the entire area was not possible due to high...click to read

    Flood line determination over a large area

    The main problem with this project was that access to the entire area was not possible due to high and dense vegetation.

    Flood lines needed to be determined for future developments in the area. The project area included roads, bridges and water courses. In these situations, making use of Aerial Drone Survey techniques is absolutely perfect.

    After processing the data, we made use of filtering tools to be left with only the ground data (Digital surface model or DTM). From these points we generated a contour map that was used to determine the flood lines as needed by civil engineers.

     

  • 3D modelling abandoned Kempton Park Hospital

    The hospital has now been empty for more than 18 years. The need for an accurate ortho photo and 3...click to read

    3D modelling abandoned Kempton Park Hospital

    Abandoned Kempton Park Hospital

    The hospital has now been empty for more than 18 years. The need for an accurate ortho photo and 3D model came when it was decided that the Kempton Park Hospital would be demolished.

    Underlying services needed to be mapped and 3D models needed to make accurate decisions from a office space.

    The model can be used in modelling software to add or remove structures in order to get a better representation of what’s to come.

    Kempton Park Hospital Aerial Photo

    Watch the full 3D video HERE

  • Designing with Digital surface models (DSM) VS Digital terrain models (DTM)

    (First image DSM, second DTM with contours, final image Ortho photo with Contours)

    In most cases ...click to read

    Designing with Digital surface models (DSM) VS Digital terrain models (DTM)

    DSM of rural area in South AfricaDTM generated from DSM with contoursOrtho photo with contours generated from DTM and DSM

    (First image DSM, second DTM with contours, final image Ortho photo with Contours)

    In most cases the terrain model will be used when it comes to design. But using the surface model one can get better insight of the surroundings and design around them. This could include landscape properties such as trees and other buildings.

    Surface models are a representation of what you will find in the field. The model includes all objects. For engineering purposes, these objects are removed using filters and algorithms to gain a true DTM that are used in most cases. 

    DSM converted to 3D mesh with designed object

    (DSM with texture with "design" inserted)

    For someone like an Architect, Landscape architect or Environmental specialist it is sometimes needed to make use of the Digital terrain model to make accurate decisions before starting with a project.

    With our methods of surveying all the objects are captured. We provide both DSM and DTM to our client’s as well as Orth photos.

     

  • Roof planning on destroyed court house

    The court house in Polokwane (Pietersburg) was burned to the ground back in 2012, recently it was ...click to read

    Roof planning on destroyed court house

    The court house in Polokwane (Pietersburg) was burned to the ground back in 2012, recently it was decided to re-construct the building to its old glory. 

    The purpose of this project was to determine the exact heights as well as checking the placement of the beams that will support the roof.  Although building plans was available, our client decided to make sure the roof will fit before beginning with construction.

    With all of the building rubble in the way it was difficult and close to impossible to get all the needed measurements by hand. We decided to send out a UAV before leaving to gather Aerial LiDAR points in case we would need it.

    After processing the points and comparing to the building plans, nothing lined up or made sense. We decided to process the aerial UAV survey data.

    On the 3D generated point cloud we could see that the building measurements was out by almost 1m. We then generated an Orthomosaics and superimposed the building plans.

    Although the roof designed was already completed by our client, construction was yet to start. Making use of the Aerial photos saved hundreds of thousands in construction cost. The Aerial photos will also be used to update the current building plans as they are <2cm accurate at the height that was flown. 

     

  • Volume calculation of radioactive dumps

    Summary: To calculate the volume of radioactive piles in order to rehabilitate the area for future...click to read

    Volume calculation of radioactive dumps

    Summary: To calculate the volume of radioactive piles in order to rehabilitate the area for future use.

    Because of the nature of the survey, we decided to make use of Aerial UAV Survey techniques. The type soil which was mainly white in color led to flying very low to relative ground. This enabled us to get high resolution data, <3cm ground sampling distance (GSD) for spot height.  

    With this technology we could then determine the volumes as accurately as possible. Having spot height every 3cm makes it possible to include smaller piles that normal surveying techniques will usually miss or skip. It is also possible to measure piles accurately that do not have a uniformed shape. 

    As an end result, we were able to calculate the volumes on all of the piles as well as provide the client with high resolution Aerial photo for GIS and 3D modelling purposes.

     

 
 
 

Contact Details

Please feel free to contact us:

(For Quotations, please email us the relative details including the locations in Google Earth if possible)

 

083 268 4776

dvd@vdsurvey.co.za  

Jamaican Music, Mooikloof, Pretoria

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