Huge amount of new releases from Trimble April 24th!!

It’s time to do more. Trimble has announced new additions and enhancements to our Geospatial Solutions Portfolio that drive more efficiencies and productivity for survey & engineering organizations. Read more about these new and enhanced solutions, including GNSS, total station, scanning, imaging, field software, office software, and cloud solutions. www.trimble.com/timetodomore    

Comparing a Trimble V10 Panorama and a Panoramic Camera

Trimble V10 Imaging Rover: V10 Panoramas Compared to Panoramas Captured with Panoramic Cameras

Question

What are the differences between panoramas captured with the Trimble V10 rover and panoramas captured with panoramic cameras?

Answer

Panorama cameras are used more and more frequently in close range photogrammetry. These cameras have a number of features, including the following:
  • The images no longer have a full central perspective.
  • Central perspective may be given in the vertical direction only.
  • The object is projected onto a cylinder.
  • The projection center is located normally on the cylinder axis.
  • Panoramic cameras are normally stand-alone solutions. It is not easy to integrate the images into surveying workflows and processes.
In comparison, panoramas created with a Trimble V10 rover have the following features:
  • Single images are captured.
  • The images have full central perspective properties.
  • The images are stitched together, forming a panorama with overlapping areas between adjoining images. This is based on the exterior calibration of the cameras.
  • The projection centers of the cameras are not located on the rover axis.
  • Each camera has its own projection center. The projection centers are located approximately on a circle around the vertical rover axis.
  • The stitched panorama acts as an overview image (left image).
  • Measurements are always done in the original image (right image).
The Trimble V10 Imaging Rover has the following specific features:
  • It is fully integrated in the surveying workflow.
  • It can be used with a Trimble R10 GNSS receiver or an S-Series total station.
  • It is supported by the Trimble Access field software.
  • The V10 panoramas can be processed together with the surveying data in the Trimble Business Center office software.

Using the Trimble V10 without Positions

Trimble V10 Imaging Rover: Measuring in a Local System Without Positional Information

Question

Can I process V10 projects without any given positional information?

Answer

In general, the Trimble Business Center software needs three or more control points that are well distributed in the object area in order to reference the photogrammetric model to the user coordinate system. The bundle adjustment in the Trimble Business Center software version 3.40 can now recognize when there is not enough information to solve the adjustment. To overcome the lack of information, the user can add constraints, that is, position or coordinate constraints and scale constraints:
  • When you have entered a scale constraint only, the system adds a centroid and rotation constraint automatically.
  • When you have entered a scale constraint and one coordinate constraint, a rotation constraint is added automatically.
  • When you have entered two coordinate constraints, the system adds a rotation constraint about the line between the coordinates automatically.
  • If tilt information for a station is enabled, the number of automatically added constraints is reduced. The system basically seeks to create a minimally-constrained network by automatically adding whatever is needed.
Example The task is to document a traffic accident. No control points are given and no position sensors are available. It is therefore necessary to define a local system. An easy way to do this is by using a normal levelling rod placed in front of the 2 cars shown below. The leveling rod must be visible at least in 2 of the panoramas taken around the object area: The rod defines a local coordinate system. Point Sys01 is the origin of the system while point Sys02 defines the north axis. These points can be used as coordinate constraints in the Setup Type tab of the Adjust Photo Station pane as shown in the following image:     The quality should be set to control quality. The constraint points must be measured photogrammetrically in a least 2 panoramas, for example in Stat01 and Stat02. The coordinate constraints define the system origin and the north orientation. With both points also a scale is given. However the photogrammetric model is not fixed about the line between both points. The system automatically sets rotation constraint supported by the measured tilts of the panoramas. The datum is defined on one side of the object. Therefore it may be advantageous to provide another constraint on the other side of the object. This can be done for example by placing there another levelling rod. The leveling rod provides another value for the scale defined by the length of the rod shown in the following screen shot:     Both end points, Scale1 and Scale2, must be measured at least in two of the panoramas, for example in Stat04 and Stat05. After measuring enough manual tie points in all panoramas, the project can be adjusted. The Group Statistics section in the bundle adjustment report now holds an additional group for the scale. As two scale factors are introduced, the redundancy is one.  The numbers are coming from a project with only 4 panoramas.     Note: In Trimble Business Center software version 3.40 it is necessary to measure manual tie points. It may be possible in a later release to measure automatic tie points.

S Series Total Station Collimation Stylesheet

Trimble Access Software: Instrument Collimation Report

Question

How do I use the Instrument Collimation Report style sheet in the Trimble Access software?

Answer

Get the xsl stylesheet from HL firstly. The Instrument Collimation Report, created from a Trimble Access or Trimble Survey Controller job file, reports the first collimation adjustment stored in this job file. The report does not depend on the instrument the controller is connected to while creating the report. A typical procedure will be as follows:
  1. Start a new job and carry out the instrument adjustment/collimation.
  2. Carry out the survey. The collimation data will be available through the Instrument Collimation Report.
If no instrument adjustment (collimation test) is done before the first survey in the job is started, the values will be taken (and stored in the job) from the memory of the connected instrument as being the latest values stored for this instrument. In such a case, the time is the time the first survey in the actual job was started. This is because no time is stored with the collimation values inside the instrument. In other words, if you start a new job, even if you have made the latest instrument collimation adjustment in a different job or even without a job, exporting the collimation report from inside this new job will use the values from the latest collimation adjustment. Example:
Instrument details recorded at: 08:55:03 19 Mar 2014
Instrument: Trimble VX Spatial Station
Serial #: 93510123
Horizontal collimation set in instrument: 0.00060
Vertical collimation set in instrument: -0.01460
Trunion axis tilt error: 0.00100
Autolock horizontal collimation set in instrument:  -0.00220
Autolock vertical collimation set in instrument: 0.00010