photogrammetry surveys

2015
2016
2017
2015-16
2016-17

High quality true-colour orthomosaics are an essential aspect of any survey. Our 80MP colour survey camera can collect large areas at a resolution of a few centimetres. Photogrammetric processing generates accurate large area true orthomosaics and digital surface models. These outputs are ideal to provide context, conduct feature extraction, line of sight and change detection analysis.

Collect

2Excel geo’s Phase One iXA IQ180 80MP camera is a medium format survey grade colour camera with forward motion compensation and 37° field of view. Spatial resolution from a typical 1000m height collection is 6cm with each frame covering approximately 650mx650m. We can collect hundreds of square kilometres in a single survey. Overlap between frames enables photogrammetric processing and the generation of orthophotos and digital surface models.

2015 RGB
2015

Process

2Excel geo use an end-to-end photogrammetry solution to conduct accurate aerial triangulation, surface model extraction and true orthorectification. Absolute spatial accuracy can be assured by incorporating knowledge of known surveyed points.

2016 RGB
2016

Orthomosaics

Each image frame is colour balanced and orthorectified using the derived digital surface model. Mosaics can be generated from a large number of frames (up to thousands) with full control over those frames contributing to the final output to maximise overall quality.

2017 RGB
2017

Digital Surface Models

A digital surface model may be used for line-of-sight analysis, additional outputs derived from the surface model such as slope and aspect may be used for soil erosion assessments and planning solar farm installations.

DEM
2015
2016
2017

Change Models

Digital surface models provide an ideal input to change detection analysis. Volumetric change detection is more robust than image change detection as it is unaffected by changes in illumination and cast shadows.


Red = Gone
Blue = New

2015-2016 2016-2017