Table of Contents
Prepare MM Data Trimble
This is the description of how Trimble Mobile Mapping data needs to be prepared for the Orbit AIM import.
Panorama Images
The panorama images are stored in the *.pgr files :
- for every photo positions there are 6 individual pictures coming from the ladybug 3
- single file size is limited to 2GB, multiple files possible : <name>-000000.pgr, <name>-00001.pgr
Panorama Image Positions
The photo positions are post processed to a *.gps file and then converted into the SHP format :
- each point idicates the center of a panorama
- Description of Attributes :
| Orbit | GPS/SHP Attributes | Attribute Type | Data Units | Description |
|---|---|---|---|---|
| longitude | X | float8 | decimal degrees | Longitude in decimal degrees WGS84 |
| latitude | Y | float8 | decimal degrees | Latitude in decimal degrees WGS84 |
| Z | Z | float8 | meters | Altitude (orthometric) in meters over the NMM |
| pan | heading | float8 | radians | Heading angle or vehicle direction in radians. This angle is defined using the Cartesian coordinates system, which means counter clockwize with a 0 on the positive axis of the X. It is generated by an Inertial Measurement Unit (IMU) or is calclated according to the GPS coordinates |
| tilt | Pitch | float8 | decimal degrees | Angle corresponding to the vehicle pitch (front-back) in decimal degrees. Generated by an IMU. |
| roll | Roll | float8 | decimal degrees | Angle corresponding to the vehicle roll (left-right) in decimal degrees. Generated by an IMU. |
| image | Frame_No | int8 | Unique image ID. In the shape file saved as an integer (INT8) and consequently without leading 0-values. |
Exporting .gps files to Shape using Trimble T3d GPS
- Open function GPS2SHP
- Select the .gps files
- Run & Check results
Point Cloud
The point cloud is the composition of 3 sensors, resulting in 3 *.las files :
- Hlidar_…_LAS1_2.las
- Llidar_…_LAS1_2.las
- Rlidar_…_LAS1_2.las
Exporting Las v 1.2
- The supported .las version is 1.2
