Method to generate airport obstruction charts based on a data fusion between interferometric data using synthetic aperture radars positioned on spaceborne platforms and other types of data acquired by remote sensors

摘要

The proposed invention describes a method to generate Airport Obstruction Charts, based on a fusion between interferometric data acquired by Synthetic Aperture Radars positioned in spaceborne platforms, and other types of data acquired by remote sensors. It is characterized by the following stages;- Conversion of pre-existent analog data of the surveyed areas to digital format:-Vectorization of the data;- Data analysis already in digital format;- Generation of Digital Surface Model (MDS, being the input data structure to be used by the Land Change Detection Algorithm, in raster format;- Comparison between the initial Digital Surface Model and the new data acquired in a later epoch;- Comparison between the base Digital Surface Model (MDS) and the altimetric data structure derived from interferometric data obtained from the Synthetic Aperture Radars positioned in spaceborne platforms;- Registration and georeferencing of the Digital Surface Model (MDS);- Cut the image to ensure that all the surveyed area is correctly identified;- Resampling of the raster models to be compared with those obtained between the initial and latter epochs, in order to present the same number of pixels either in line or column, representing the same surveyed area;- Detection of land changes in order to compare the elevations in both digital surface models (MDS) obtained from different epochs, to produce a third raster model;- Overlay between the raster images of the objects considered as obstructions and the Airport Obstruction Chart in vector format;- New obstructions validation;- and dissemination of the new Airport Obstruction Charts to the relevant authorities.