SOLUTIONS
EFFICIENT PROCESSING
To explain what we mean by light touch, we need to start with the technology used in what we refer to as a multistep approach or the mainstream approach. To make it simple we focus on the typical steps for optical data.
SENSOR AGNOSTIC
Spacemetric has provided image management solutions to customers who require systems which automatically processing medium, high and ultra-high resolution satellite data, as well as data from unmanned aerial vehicles and commercial aircraft.
LINE-OF-SIGHT MODEL
Image orthorectification is a key function of Spacemetric's software’s. High-accuracy image geolocation is possible using rigorous photogrammetric methods using physical sensor models and advanced statistical treatment of geometric reference data.
MAP PROJECTION
The map projection transforms the geographic coordinate to a cartographic coordinate (x, y, h), using a map projection that is suitable in the area of the image. There are thousands of different map projections in use for cartographic purposes in different areas all over the globe and these are referenced using standard EPSG codes. New projections can easily be defined.
ORTHORECTIFICATION
When the line-of-sight geometric model is established for an image, it can be used in image orthorectification.
GCP’S AND TIE-POINTS
Prior to the image orthorectification the parameters of the line-of-sight model can be adjusted to fit a set of ground control points (GCPs). This has the goal of achieving an improved geometrical accuracy in the output product.
AUTOMATED GCP MEASUREMENTS
The measurements of GCPs can be automated if suitable reference data sets are available. The reference data must be in the form of reference images covering the scene area. The reference images are ortho-rectified images with an accuracy as good as or better than the desired target scene accuracy.
GEOMETRIC ACCURACY
Spacemetric software has achieved unsurpassed geometric accuracy in operational environments for many years. The key factors are: precision and robustness.
CLOUD MASKING
Spacemetric has implemented improved cloud masking and cloud shadow identification methods based on monitoring and analysis of the state of the art in this field via projects funded through national programmes and internal R&D funds.