Tutorials 3Dsurvey

///Tutorials 3Dsurvey
Tutorials 3Dsurvey 2018-06-11T09:23:09+02:00 
Tutorial 1

PC SETTINGS

There are some PC settings that need to be reviewed / changed to optimize computer and graphics card performance before we start working with 3Dsurvey.

Two settings are essential for good performance:
1. Set energy saving options: Settings -> System -> Mains operation and energy saving -> Additional settings -> Maximum performance
2. Adjusting the graphics card 3D settings: Desktop -> right mouse button -> Graphics card system controls (e.g. Nvidia) -> Manage 3D settings
Assign 3Dsurvey to the graphics card: Program settings tab -> Add -> Search -> 3Dsurvey -> select 3Dsurvey.exe -> Apply settings

Tutorial 2

Load images with telemetry and orientation with control points

This tutorial will show:

  • Create and start project
  • Import images with telemetry files
  • georeferencing with control points
Tutorial 3

Import images with EXIF ​​/ GPS orientation

This tutorial will show:

  • Create Project
  • Import images with Exif data
  • create a point cloud
  • Creating an orthophoto

This scenario applies when you use images captured by drones such as the DJI Phantom 4 series, the DJI Mavic series, the DJI Inspire series, eBee, Falcon 8 or any other UAV that has GPS data (approx. 1,5 m accuracy) and saved as part of EXIF ​​in your image file (typically .jpeg).

Tutorial 4

Image import with EXIF ​​/ GPS data and control points

This tutorial will show:

  • Create Project
  • Import images and orientate with GCP
  • Create a point cloud
  • Creating an orthophoto

This scenario occurs when you use non-GPS or other geolocation data and need to align your model with ground control points.

Tutorial 4.1

Orientation part 2

This tutorial will show:

  • Improve orientation of 3D models in 3D surveying using EXIF ​​/ GPS data and ground control points (GCP)

To manually correct / improve the model alignment, click on Orientation -> Orientation with GCP -> Search for a file and open it -> Next.

Find GCPs on aerial photos -> right mouse click to select (3 ground control points must be selected for the 3D measurement) -> check, confirm or ignore certain goals / points and adjust the 3Dsurvey results -> next -> check orientation accuracy -> finish

Tutorial 5

mass calculation

In this tutorial a short overview of the result of the 3D point cloud calculation is shown.

In order to calculate volume of the material, a digital surface model must first be calculated: DSM -> Recalculation -> Grid cell size: 0,2 meters, Hole fill mode: “Inner only” and Smoothing cell size: 2 cells -> Select area to calculate with left click, select finish with right click -> calculate volume (smooth function to see lower area of ​​calculation)

Tutorial 6

Reprocess orthophoto

This tutorial will show you how to recalculate a digital orthophoto card.

Area with some edge zone Select with a left click, exit with a right click -> select image with preferred view -> confirm -> recalculate DOF

Tutorial 7

Mass calculation with two horizons

This tutorial will show you how to measure volume differences between two consecutive measurements.

Remove all obstacles / points that do not define a digital terrain model and cancel terrain points

Calculate the volume difference DSM for both point clouds: DSM -> recalculation -> parameters: 0,2 meters, ALL, 2 cells -> calculate -> selection of the area -> left click to start, right click to end -> first measurement red, second yellow - > Calculate volume -> volume difference in the result window

Tutorial 8

Using the bounding box

This tutorial will show you the functionality of the character box.

Move sections freely left, right, up or down and you can check the data inside the box while ignoring everything outside.
If you slide 2 opposing bounding box slices together you get a 3D profile of the surface model. To move through the 3D model, press CTRL and left click on the bounding box window and you can move it in any direction and explore all sections as you go.
Use the bounding box either in the point cloud or in the DSM tab.

Tutorial 9

Edit point cloud

This tutorial will show you how to work most efficiently with a point cloud:

  • Use the left mouse button to rotate model, middle button to move model, and scroll up or down to zoom in or out
  • Delete points from a point cloud
  • Check the terrain elevation changes using the Point Snapping tool or lower or raise the point cloud surface using the editing tool
  • “Delete Others” function to quickly delete all unnecessary
Tutorial 10

Create profiles

This tutorial shows how to create profile lines or cross sections from a point cloud.

Create the profile line -> define segment line -> select profile definition line or calculate cross section

Tutorial 11

Connect orthophotos

This tutorial will show you how to put together 2 separate orthophoto mosaic cards.

Turn on both orthophoto maps -> Connect -> Select area for merged orthophoto -> Next -> Connection wizard: first orthophoto as 'Insert Selected DOF', second orthophoto set the alpha to “middle position” to clarify coverage -> “Select area ” -> Blend size to 50 -> Merge selection and avoid obstacles -> Finish

Tutorial 12

Unknown camera parameters

This tutorial will show you how to start image editing without any known camera parameters.

Load images in 3D measurement -> Bundle Adjustment -> Orientate model using ground control points or skip -> Reconstruction of 3D model

Tutorial 13

contour lines

This tutorial shows how to create contour lines based on a digital surface model.

DSM is already prepared -> Calculate contour lines -> Check contour lines and export in DXF or PDF format

Tutorial 14

Classification of the point cloud

This tutorial will show you how to use the Point Cloud Classification Wizard to calculate a perfect digital terrain model.

Remove obstacles on the point cloud on level 1 -> All points colored in red are terrain points and the rest are all to be removed -> Delete others -> recalculate DSM

Tutorial 15

Trade Shows

This tutorial shows how to use the 3Dsurvey measurement tool to perform 3D measurements on a point cloud.

Select function Measure -> Left click to start and end line, right click to end measurements -> Set text size -> Select 3D distance or 2D distance

Tutorial 16

CAD functions

The last tutorial will show you how to geotag images in Mission Planner. This case applies to drones that do not automatically save GPS information in EXIF ​​data.

Start Mission Planner -> CTRL + F for Temporary Options -> first option Georeference Images -> select log file -> radio button Cam Message Syncro -> Next -> Geotag Images -> new folder named 'Geotagged'

Important: only select aerial photos for geotagging, the rest must be deleted before importing into the Misssion planner.

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