---
title: "B2G to E57"
slug: "cyclone-register-360-b2g-to-e57"
updated: 2026-09-07T11:31:43Z
published: 2026-09-07T11:31:43Z
canonical: "rcdocs.leica-geosystems.com/cyclone-register-360-b2g-to-e57"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://rcdocs.leica-geosystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# B2G to E57

B2G files, such as BLK2GO, BLK2FLY, and BLK ARC, can be processed into an E57 without importing the file first.

> [!NOTE]
> **Notes**
> 
> - When users import .b2g data directly as E57, the Cyclone REGISTER 360 settings are not applied.
> - Instead, the CLI uses settings from the last BLK import for processing, so these need to be set first.
> - A Cyclone WORKFLOW license is required to use this command.

These exported E57 files contain:

- The main point cloud.
- Another point cloud represents the trajectory as points.
- All Pano image locations.
- All Pano image orientations along the trajectory.
- Normal calculations per point along the trajectory.
- Option to export rectified images to the E57 file.
  - These images can be used to help align images to the point cloud for certain applications.
  - `recimage` is added to the end of the command line inside of the CMD Windows program.
- Option to set WayPoint interval:
  - `interval=(n)`, n being the distance in meters.
    - Example: `interval=10`, this would create a WayPoint every 10 meters.
- Option to create WayPoints from GeoTags:
  - The command is: `geotag-waypoints`
  - Using this command will add GeoTags for every detailed image captured in the field.

Workflow and usage:

1. Open Cyclone REGISTER 360 PLUS.
2. Create a project.
3. Drag and drop any B2G file in the Import area of Cyclone REGISTER 360 PLUS.
4. Set the desired WayPoint (Pano sphere) creation interval along the trajectory (lower right pane).
5. Close Cyclone REGISTER 360 PLUS (do not import the data).
6. Open up a CMD window.
7. Set the path to the install directory of Cyclone REGISTER 360 PLUS.
8. Type in the following commands:
  1. `Register360.exe -b2g2trajectory [b2g directory] [export directory]`.
9. The CLI will process B2G into an E57 file.

![cli-2..PNG](https://cdn.document360.io/820e11db-8ed5-45ae-ac86-f6b77dcb2aa7/Images/Documentation/cli-2..PNG)

Here is an example output showing the exported objects in the E57 from an XML output. Please review [http://www.libe57.org](http://www.libe57.org/) for E57 coding standards:

// into the E57 header goes e57CameraToPano, the "solution"

`Eigen::Quaterniond rot(e57CameraToPano.rotation());`

`imageHeader.pose.rotation.w = rot.w();`

`imageHeader.pose.rotation.x = rot.x();`

`imageHeader.pose.rotation.y = rot.y();`

`imageHeader.pose.rotation.z = rot.z();`

`imageHeader.pose.translation.x = e57CameraToPano.translation().x();`

`imageHeader.pose.translation.y = e57CameraToPano.translation().y();`

`imageHeader.pose.translation.z = e57CameraToPano.translation().z();`

// Setup the Name and Description

`imageHeader.name= e57::ustring(pImageName);`

`imageHeader.description = e57::ustring("");`

// the image gets its own GUID

`String guidStr;`

`guidStr.Printf(32, "%.16llx", scanId); `// Writes 16 hex digits for an 64-bit type

`imageHeader.guid = guidStr.c_str();`

`imageHeader.associatedData3DGuid = mAssociatedData3DGuid.c_str();` // image is associated its scan via the scan's GUID

// Setup the DateTime `imageHeader.acquisitionDateTime.SetCurrentGPSTime();` //set current time.

`imageHeader.sensorModel = "CycloneRegister360";`

// Setup image size

`if (!isPanoramic)`

`{`

`const double pixel_size = 6.0e-6; // 6 micro-meter (arbitrarily picked number)`

`imageHeader.pinholeRepresentation.jpegImageSize = compressedSize;`

`imageHeader.pinholeRepresentation.pngImageSize = 0;`

`imageHeader.pinholeRepresentation.imageMaskSize = 0;`

`imageHeader.pinholeRepresentation.imageWidth = (int32_t)width;`

`imageHeader.pinholeRepresentation.imageHeight = (int32_t)height;`

`imageHeader.pinholeRepresentation.focalLength = focalInPixels * pixel_size;`

`imageHeader.pinholeRepresentation.pixelWidth = 1.0 * pixel_size;`

`imageHeader.pinholeRepresentation.pixelHeight = 1.0 * pixel_size;`

`imageHeader.pinholeRepresentation.principalPointX = *pCenterInPixels;`

`imageHeader.pinholeRepresentation.principalPointY = *(pCenterInPixels + 1);`

`}`

`else`

`{`

`imageHeader.sphericalRepresentation.jpegImageSize = compressedSize;`

`imageHeader.sphericalRepresentation.pngImageSize = 0;`

`imageHeader.sphericalRepresentation.imageMaskSize = 0;`

`imageHeader.sphericalRepresentation.imageWidth = (int32_t)width;`

`imageHeader.sphericalRepresentation.imageHeight = (int32_t)height;`

`imageHeader.sphericalRepresentation.pixelWidth = 2.0 * PI / width;`

`imageHeader.sphericalRepresentation.pixelHeight = 1.0 * PI / height;`

`}`

`try`

`{`

// Write the image header

`int32_t imageIndex = mpE57Writer->NewImage2D(imageHeader);`

// Write the JPEG data

`int64_t rVal = mpE57Writer->WriteImage2DData(imageIndex, e57::E57_JPEG_IMAGE,`

`isPanoramic ? e57::E57_SPHERICAL : e57::E57_PINHOLE,`

`(void*)pCompressedData, 0, compressedSize);`

`}`