In this article:
Setting a Preview Area
The build process entails a series of sequential steps beginning with photo preparation, followed by aerotriangulation (AT), then three reconstruction steps (point cloud creation, model creation, model texturing), and finally project output. Aerotriangulation and reconstruction can each be performed either on the entire project or on specific project sections by defining AT and reconstruction areas.
In order to avoid unnecessary processing of a massive amount of data, it is recommended to perform a preliminary build on a small subset of the project. This enables you to validate all the project’s settings and parameters and check the resulting aerotriangulation (AT) and reconstruction tiles before processing the full project.
- On the Tools tab, in the Objects and Layers group, click Imagery Layer. The Browse for Imagery Layer dialog box is displayed.
- Browse to .\PhotoMesh7.7.0 - Quick Start Tutorial\ImageryLayer\ Frederick_nadir_2.5cm_20141001.jp2 and click Open. The imagery layer is added to the project.
Note: You can overlay the default terrain database with higher resolution imagery and elevation raster layers, as well as terrain objects, generally to enable you to visualize how the model will appear in TerraExplorer’s 3D World (Tools > Objects and Layers). In this case, we overlaid the terrain with an imagery layer to make it easier to designate where to draw an AT Area polygon in the steps below.
- On the Home tab, in the Area group, from the AT Area drop-down list, select Redraw AT Area.
- In the 3D Window, draw an AT Area polygon around the area indicated in the figure below (Click in the required locations and right-click to finish editing the polygon). The AT Area is framed by a white polygon.
Note: In the Message log, a message is displayed indicating the number of photos included in the AT area.
- On the Home tab, in the Area group, from the Reconstruction Area drop-down list toggle on the Same as AT Area check box. The Reconstruction Area is framed by a light green polygon.
Note: The AT Area polygon is hidden in this case by the Reconstruction Area polygon since the same area was set for both.
Preview Build Area
Using Fusers and Setting the Working Folder
PhotoMesh fusers are the worker components of PhotoMesh, which allow you to share the demanding processing requirements of the different build steps (photo preparation, AT, point cloud, mesh model, texture, 3DML/other outputs) between several computers on the same network. When beginning the build process, the PhotoMesh Build Manager application determines what build steps are required and assigns them to the different fusers. PhotoMesh Build Manager and PhotoMesh fusers use the working folder to communicate: to deposit and collect pending tasks, and share information about fuser availability, status and progress. Before beginning the build process, you should start the fusers that will be participating in the build, and set their working folder. The working folder on each of the fuser computers must be set to the same network folder as was set for the master computer. More about: Setting the working folder (on the master computer) >
- Click Start > Skyline PhotoMesh > PhotoMesh Fuser. A PhotoMesh fuser icon is placed in the Windows system tray.
Note: If running a fuser for the very first time, a PhotoMesh Fuser dialog is displayed asking you to set the location of the working folder. Browse to .\PhotoMesh7.7.0 - Quick Start Tutorial\WorkingFolder\ (full path is required here) and click Select Folder. You can then skip steps 3-5.
- Click the PhotoMesh Fuser icon, and then click Open PhotoMesh Fuser. The PhotoMesh Fuser dialog box is displayed.
- In the PhotoMesh Fuser dialog, click Change to select a different location for the working folder. The Select Folder dialog is displayed.
- Browse to .\PhotoMesh7.7.0 - Quick Start Tutorial\WorkingFolder\ (full path required here) and click Select Folder.
PhotoMesh Fuser Dialog
- When using computer clusters:
- The path to the working folder must be in UNC format to enable network data transfer: [UNC Master] + \PhotoMesh7.7.0 - Quick Start Tutorial\WorkingFolder. For example: \\Machine1\c\PhotoMesh7.7.0 - Quick Start Tutorial\WorkingFolder
- Both PhotoMesh and PhotoMesh fusers require read-write access to the working and project folders, as well as to the photos folder.