Initial Wizard

The Pixels to Points Wizard is a tool to help guide users to the appropriate Pixels to Points settings based on their desired outputs. Use this wizard to import and set your image settings, your desired output types, and the wizard will do the rest.

Application of ground control points is not possible with the wizard. When prompted, choose the option to Use Main Window, or the Skip Wizard button to bypass the wizard and skip ahead to the main Pixels to Points dialog.
To disable the wizard, so the original Pixels to Points dialog always opens to the main dialog, go to the Configuration Menu > General > Advanced > and change the Pixels to Points starts as drop down setting. .

 

Project Set-Up

First, name and determine the location of your output files.

Project Name - Set the name for the completed project.

Project Folder - Select where on your computer the finished .gmp and other related files should be saved. This is also referred to as setting the Project Directory.

 

Initial Setup

Next, supply the image files and camera information:

Add images - There are multiple ways to bring images into the wizard:

  • Add Image Files to select image files from your computer.

  • Add Folder to import an entire folder of images from your computer.

  • Add Loaded Picture Points to import the images currently loaded in your Global Mapper Workspace.

  • Or, drag and drop images directly into the wizard from your computer.

Remove Selected Image(s) by right-clicking in the list of images and choosing Remove Selected Images(s). Multiple images can be selected by using Ctrl or Shift while clicking.

Image Datum - Supply the datum that was used by the GPS/GNSS device. Typically this information is automatically populated from the image's EXIF / metadata.

Positions from File - If applicable, use this option to select a text file that contains EXIF / metadata information for the imported images. The image file names must be included in the text file for the data to be matched with the proper image file.

Camera Model - Typically the make and model of the camera is automatically populated from the image's EXIF / metadata, but cameras can be added or edited manually with the Manage Cameras button.

Once your settings have been chosen, use the Next button to progress to choosing your desired project type.

 

Select Project Type

Use the dropdown menu to select the type of output you would like to generate. Choosing one of these options will help populate the desired options and settings for running Pixels to Points. Additional outputs can be chosen after clicking Next to proceed to the Additional Outputs dialog.

After selecting an output, click Next.

 

Additional Outputs

In addition to the output chosen in the previous window, select any of the following to be generated in the output:

  • DSM - A Digital Surface Model is a gridded layer representing the highest point in each area based on the dense point cloud. Area size (sometimes referred to as bin size) is set by the resolution option. A DSM is different from a 3D Mesh in that the DSM looks for the highest points and from them creates a grid of square cells, while the 3D mesh is a triangular surface made from key points in the point cloud. A DSM can also be generated post-processing using the Create Elevation Grid tool.

  • Contours - Contour lines are 3D line features that delineate changes in elevation. These contours are generated from a digital surface model. Contours can also be created post-processing from the Generate Contours tool.

  • Sparse Point Cloud - Generates a very sparse point cloud of 1% or less of the original. This processes more quickly and the dense cloud at the cost of resolution.

  • Dense Point Cloud - Generates a full-resolution point cloud.

  • Camera Frustums -Displays a representative view of each camera.

Output Settings

  • Output Projection - By default, the current display projection in the workspace will be used, if the projection is planar; otherwise, outputs will be generated in the appropriate UTM zone.

    Alternatively, use the Select/Add projection button to select the desired the projection for the output file. If the chosen projection is not ideal for the location of the images, the Projection Adviser dialog will give you the option to continue, select a different projection, or cancel.

  • Advanced Settings - Takes you from the Wizard to the full Pixels to Points dialog, where you can add ground control points, apply masking, and change other settings.

Note: The point cloud will use the vertical datum of the camera metadata (typically ellipsoidal height) or the ground control points (if supplied). For vertical datum transformation options, see GeoCalc Mode: Projections and Datums.

Save as Template

This option allows you to save a template of your Pixels to Points processing settings, including Project Type and Additional Outputs, for future use. Saved templates can be selected from the Project Type drop-down menu.

Click Run to process the images in Pixels to Points.