Knowledge Base - Version 17.0
Recent Changes
This is documentation of an archived release.
For documentation on the current version, please check Knowledge Base.

Prepare MM Data Teledyne-Optech Lynx

This page describes how to prepare Teledyne-Optech mobile mapping resources for Orbit.
Using the Teledyne-Optech Orbit Import Template LMS prepared resources can be imported into Orbit

It is strongly recommended to read first Concepts about Mobile Mapping data in Orbit.

Trajectory

Trajectory positions file

  • File format : One ascii *.asc file.
  • File structure Rows : Each timestamp is one record.
  • File structure Columns : Tab separated (char9), headers, with exact order as the example below.
  • Value “TIME” : GPS Week time, seconds from last Sunday 00:00:00, decimal notation.
  • Value “EASTING, NORTHING”: Any supported projected coordinate reference system can be used. But all mobile mapping resources must have the same projected CRS.
  • Value “ELIPSOID_HEIGHT” : Height above ellipsoid, decimal notation.
TIME	EASTING	NORTHING	HEIGHT	ROLL	PITCH	HEADING	RMS_EASTING	RMS_NORTHING	RMS_HEIGHT	RMS_ROLL	RMS_PITCH	RMS_HEADING
315795.0589365	57620.6661	61358.2594	73.8255	0.955711	2.862630	269.816021	0.0300	0.0360	0.0682	0.006086	0.006065	0.025751	
315795.0639356	57620.6661	61358.2594	73.8255	0.954521	2.862725	269.816121	0.0300	0.0360	0.0681	0.006086	0.006065	0.025751	
315795.0689357	57620.6661	61358.2594	73.8255	0.953629	2.862767	269.816081	0.0300	0.0360	0.0681	0.006085	0.006064	0.025750	
...

Panoramas

Image files

  • Image type : Ladybug 3 or Ladybug 5, equirectangular panoramas.
  • Image resolution : Ratio 2×1, 8000×4000 advised for Ladybug 5, 5400×2700 for Ladybug 3.
  • File format : Each image is one *.jpg file.
  • File name : Exactly as “Image Filename” value of image position file, see below.
  • Folder structure : All files in one folder.

Image positions file

  • File format : one ascii *.txt file
  • File structure Rows: each image is one record
  • File structure Columns : Tab separated (char9), headers, with exact order as the example below.
  • Value “GPS Time” : Same time reference as trajectory, see above.
  • Value “Image Filename” : File name as on disk, with file extension.
  • Value “East”, “North”, “Height” : Same CRS as trajectory, see above.
GPS Time	Image Filename	East	North	Height	Omega	Phi	Kappa	
316241.769414	IMG3496.jpg	56757.7839	61799.6562	78.9386	-1.187031	1.429430	107.837888	
316242.102415	IMG3506.jpg	56757.7841	61799.6561	78.9385	-1.181243	1.437398	107.837367	
316242.435416	IMG3512.jpg	56757.7840	61799.6562	78.9383	-1.185742	1.433885	107.837888	
...

Planars

Image files

  • Image type : JAI distorted images
  • Image resolution : default 2456x2058pixels1)
  • File format: each image is one *.jpg file
  • File name : exactly as “Filename” value of photo position file, see below
  • Folder structure : all files of each camera in a separated folder

Image positions file

  • File format : one ascii *.txt file for each camera
  • File structure Rows: each image is one record
  • File structure Columns : tab separated (char9), headers, with exact order as the example below
  • Value “GPSTime” : same time reference as trajectory, see above
  • Value “Filename” : file name as on disk, with file extension
  • Value “Latitude”, “Longitude”, “Altitude” : same CRS as trajectory, see above
ImNum Cam CamImNm Rotate Error GPSTime Index Filename Latitude Longitude Altitude Roll Pitch Heading
3502	2	52	0	0	316242.094663	0	IMG_CameraNo2_401.tif	56757.9245	61799.3543	78.0825	-84.345385135	-18.829672521	-176.282620557	2456	2058	
3524	2	53	0	0	316243.095700	0	IMG_CameraNo2_404.tif	56757.9247	61799.3540	78.0819	-84.339999660	-18.828234871	-176.269709139	2456	2058	
3546	2	54	0	0	316244.096737	0	IMG_CameraNo2_408.tif	56757.7379	61799.4928	78.0623	-84.032760667	-18.763268482	-175.856795198	2456	2058	
...

Camera calibration

For each camera it is required to adjust the template camera calibration AttributeExpression values in the camera import Orbit Resource Description file.
Edit the template files prior to data import using a standard text editor (e.g. Notepad). Be meticulous regarding file structure and formatting.
<template_name>/planar<X>/import/import_locations.ord 

[CameraNo1]
PIXEL_SIZE =3.450000
IMAGE_HEIGHT =2058.000000
IMAGE_WIDTH =2456.000000
Focal_Length =8.260648
Radial_Distortion_K1 =0.001692
Radial_Distortion_K2 =-0.000030
Radial_Distortion_K3 =0.000000
Principal_Point_Offsetx =1228.871105
Principal_Point_Offsety =1027.912449

LiDAR

Point cloud files

  • File format : One or more *.las or *.laz files.
  • File structure : Las version 1.2.
  • Value of Latitude, Longitude, Elevation : Same reference as Trajectory.
  • Value of Timestamp : Same reference as Trajectory.
1)
Can be adjusted via Custom MM Import Configurations.
 
Last modified:: 2019/03/25 11:36