Remote Sensing

Remote sensors differ according to the type of information that is captured, with electromagnetic waves being particularly interesting in the study of various phenomena, as the electromagnetic radiation reflected or emitted by the Earth is captured by sensors on aerial platforms or orbital and translated into multispectral images. In addition, remote sensors also enable the acquisition of other types of images through RADAR technology. With this information, it is possible to create cartographic elements of extreme importance and usefulness, in several domains. Among the best known orbital platforms (satellites), Landsat, Sentinel and Quickbird stand out.
Another use of remote sensors is the capture of photographs for photogrammetric purposes. The use of this technique in relation to other traditional measurement methods, translates into numerous advantages, such as relatively fast photo collection, availability of a dense record of information with coverage of large areas, evaluation of dynamic phenomena and inaccessible objects and also the mapping update in a reduced time.

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Study of vegetation and soil types
This service provides for the production of image cartography to assess the status of different species of vegetation, as well as classification of land use, based on the calculation of a variety of indexes. To find out more, see the “Shop” section.
Production of Digital Elevation Models
Production of Digital Elevation Models using satellite imagery (RADAR).
Satellite imagery orthorectification
Processing of pairs of images acquired by orbital sensors for the production of orthorectified image cartography.
Oceanographic observation
Satellites provide much more information than could be obtained on the ground, alone. The use of specific techniques allows the spatial representation of these data in thematic charts (eg: surface temperatures, ocean color, presence and height of ice, tides, etc.)
Bathymetric models
The use of multispectral imagery currently makes it possible to estimate the bathymetry of shallow areas (up to 30 meters of depth) with sufficient precision to study the hydrodynamics of large coastal areas, natural bars and coral reefs. This type of data can be used for environmental studies, planning engineering projects or integration in nautical charts of areas that are difficult to access by echosounders. The spatial resolution varies between 0.40 - 10 meters, depending on the types of sensor used.Taking into account the specificity of the projects, multispectral cameras installed in autonomous flight vehicles can be used.
Stereorestitution of aerial photography: 3D modeling and orthoimage production
Digital Terrain Models and production of orthorectified images from aerial photography.
Photogrammetric surveys of archaeological sites
2D and 3D characterization of artefacts or archaeological sites using photogrammetric techniques.
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