Le LiDAR (Light Detection And Ranging) au service de la compréhension et de l'histoire des territoires.: Le repérage et l'étude des sites archéologiques sous couvert forestier charentais.

International audienc

Les méthodes de l'archéologie spatiale au service de la restitution de paysages anciens : l'exemple d'une forêt domaniale charentaise (France).

National audienc

Le LiDAR (Light Detection And Ranging) : pour une histoire renouvelée des forêts charentaises charbonnées, couplage entre approche classique et détection automatisée des plates-formes de charbonnage

International audienc

L'utilisation et l'apport de données LiDAR pour l'étude des forêts charbonnées de plaine charentaises (16, France).

International audienc

Le LiDAR : pour une histoire renouvelée des forêts charbonnées de plaine charentaises. Approche classique et détection semi-automatisée des plates-formes de charbonnage.

National audienceTout espace forestier ayant été exploité pour la transformation de son bois en charbon peut en conserver le témoignage sous forme d'accumulations de résidus appelés communément "charbonnière" ou encore "plate-forme de charbonnage". C'est le cas des forêts de plaine charentaises qui, en les fossilisant, sont devenues de véritables milieux "protecteurs". Préférer le milieu" fermé" à celui "ouvert" pour les repérer et les étudier assure de réels avantages même si ce choix conduit inévitablement à la mise en place de méthodes adaptées et, de plus en plus, à l'utilisation de techniques performantes comme celle du LiDAR. En faisant appel à cette technique de télédétection, un renouvellement des questionnements sur l'activité de charbonnage en Charente a été rendu possible. La typologie, l'implantation et l'organisation de ces sites peuvent désormais être plus aisément appréhendés. Ce travail se voit également facilité par l'utilisation d'un algorithme de détection semi-automatisée nouvellement mis en place et appliqué exclusivement aux charbonnières

CAMCATT: a multisensor experiment over Toulouse to validate TRISHNA urban products

International audienceAn extensive field experiment, CAMCATT-AI4GEO, was conducted for 15 days in June 2021 over Toulouse, to acquire an urban reference dataset combining airborne acquisitions and ground measurements. This presentation aims at introducing the campaign and describing the collected data, which will be used for the validation of tools developed to produce future TRISHNA products, such as algorithms used for atmospheric compensation and temperature emissivity retrieval, microclimatic models. The several workshops of this experiment will be detailed. Joint airborne multispectral thermal infrared and VISNIR-SWIR hyperspectral images were acquired along a 30 km transect centred over Toulouse. A second flight was devoted to calibrating these sensors with on-ground reference targets. During and between the flights, two cars acquired air temperature and relative humidity along a predefined itinerary across the city with sensors mounted on their roof. During the airborne acquisitions, land surface temperature measurements were performed in three locations in Toulouse for calibration purposes. They were completed outside the flight by spectral optical properties in the VISNIR-SWIR and thermal infrared domains over a large range of manmade and natural materials. A specific in lab session was dedicated to the intercalibration of the on-ground thermal sensors. Atmosphere composition data were monitored using radio soundings during the airborne acquisitions and completed with continuous measurements from on-ground stations. Finally, the last session was devoted to the validation of a thermo-radiative model. For this purpose, surface temperature sensors were installed at different locations of buildings walls supplemented by a thermal infrared images acquisition for one of the facades in order to continuously monitor its temperature during the 15 days of the experiment. The air temperature was also measured at different positions in the district (under trees, in flats, etc)

CAMCATT: a multisensor experiment over Toulouse to validate TRISHNA urban products

International audienceAn extensive field experiment, CAMCATT-AI4GEO, was conducted for 15 days in June 2021 over Toulouse, to acquire an urban reference dataset combining airborne acquisitions and ground measurements. This presentation aims at introducing the campaign and describing the collected data, which will be used for the validation of tools developed to produce future TRISHNA products, such as algorithms used for atmospheric compensation and temperature emissivity retrieval, microclimatic models. The several workshops of this experiment will be detailed. Joint airborne multispectral thermal infrared and VISNIR-SWIR hyperspectral images were acquired along a 30 km transect centred over Toulouse. A second flight was devoted to calibrating these sensors with on-ground reference targets. During and between the flights, two cars acquired air temperature and relative humidity along a predefined itinerary across the city with sensors mounted on their roof. During the airborne acquisitions, land surface temperature measurements were performed in three locations in Toulouse for calibration purposes. They were completed outside the flight by spectral optical properties in the VISNIR-SWIR and thermal infrared domains over a large range of manmade and natural materials. A specific in lab session was dedicated to the intercalibration of the on-ground thermal sensors. Atmosphere composition data were monitored using radio soundings during the airborne acquisitions and completed with continuous measurements from on-ground stations. Finally, the last session was devoted to the validation of a thermo-radiative model. For this purpose, surface temperature sensors were installed at different locations of buildings walls supplemented by a thermal infrared images acquisition for one of the facades in order to continuously monitor its temperature during the 15 days of the experiment. The air temperature was also measured at different positions in the district (under trees, in flats, etc)

CAMCATT trial over Toulouse (France): a multisensory experiment to validate TRISHNA urban products

International audienceAn extensive field experiment, CAMCATT-AI4GEO, was conducted over 15 days in June 2021 over Toulouse, to acquire an urban reference dataset combining airborne acquisitions and ground measurements. This presentation aims at introducing the objectives of the campaign and describing the collected data to validate the future TRISHNA products: bottom of atmosphere radiance, land surface temperature (LST) and emissivity (LSE), air temperature, microclimatic models, and comfort index.This experiment includes a large variety of acquisitions. Joint airborne multispectral thermal infrared and VISNIR-SWIR hyperspectral images were acquired along a 30 km transect centred over Toulouse. A second flight was devoted to calibrating these sensors with on-ground reference targets. During and between the flights, two cars acquired air temperature and relative humidity along predefined itineraries across the city withsensors mounted on their roof. During the airborne acquisitions, land surface temperature measurements were performed in three locations in Toulouse for calibration purposes. They were completed outside the flight by spectral optical properties in the VISNIR-SWIR and thermal infrared domains over a large range of manmade and natural materials. A specific in-lab session was dedicated to the intercalibration of the on-ground thermal sensors. Atmosphere composition data were monitored using radio-soundings during the airborne acquisitions and completed with continuous measurements from on-ground stations. Finally, the last session was devoted to the validation of a thermo-radiative model. For this purpose, surface temperature sensors were installed at different locations of building walls supplemented by a thermal infrared images acquisition for one of the facades in order to continuously monitor its temperature during the 15 days of the experiment. The air temperature wasalso measured at different positions in the district (under trees, in flats, etc)

CAMCATT trial over Toulouse (France): a multisensory experiment to validate TRISHNA urban products

International audienceAn extensive field experiment, CAMCATT-AI4GEO, was conducted over 15 days in June 2021 over Toulouse, to acquire an urban reference dataset combining airborne acquisitions and ground measurements. This presentation aims at introducing the objectives of the campaign and describing the collected data to validate the future TRISHNA products: bottom of atmosphere radiance, land surface temperature (LST) and emissivity (LSE), air temperature, microclimatic models, and comfort index.This experiment includes a large variety of acquisitions. Joint airborne multispectral thermal infrared and VISNIR-SWIR hyperspectral images were acquired along a 30 km transect centred over Toulouse. A second flight was devoted to calibrating these sensors with on-ground reference targets. During and between the flights, two cars acquired air temperature and relative humidity along predefined itineraries across the city withsensors mounted on their roof. During the airborne acquisitions, land surface temperature measurements were performed in three locations in Toulouse for calibration purposes. They were completed outside the flight by spectral optical properties in the VISNIR-SWIR and thermal infrared domains over a large range of manmade and natural materials. A specific in-lab session was dedicated to the intercalibration of the on-ground thermal sensors. Atmosphere composition data were monitored using radio-soundings during the airborne acquisitions and completed with continuous measurements from on-ground stations. Finally, the last session was devoted to the validation of a thermo-radiative model. For this purpose, surface temperature sensors were installed at different locations of building walls supplemented by a thermal infrared images acquisition for one of the facades in order to continuously monitor its temperature during the 15 days of the experiment. The air temperature wasalso measured at different positions in the district (under trees, in flats, etc)

CAMCATT: a multisensor experiment over Toulouse to validate TRISHNA urban products

International audienceAn extensive field experiment, CAMCATT-AI4GEO, was conducted for 15 days in June 2021 over Toulouse, to acquire an urban reference dataset combining airborne acquisitions and ground measurements. This presentation aims at introducing the campaign and describing the collected data, which will be used for the validation of tools developed to produce future TRISHNA products, such as algorithms used for atmospheric compensation and temperature emissivity retrieval, microclimatic models. The several workshops of this experiment will be detailed. Joint airborne multispectral thermal infrared and VISNIR-SWIR hyperspectral images were acquired along a 30 km transect centred over Toulouse. A second flight was devoted to calibrating these sensors with on-ground reference targets. During and between the flights, two cars acquired air temperature and relative humidity along a predefined itinerary across the city with sensors mounted on their roof. During the airborne acquisitions, land surface temperature measurements were performed in three locations in Toulouse for calibration purposes. They were completed outside the flight by spectral optical properties in the VISNIR-SWIR and thermal infrared domains over a large range of manmade and natural materials. A specific in lab session was dedicated to the intercalibration of the on-ground thermal sensors. Atmosphere composition data were monitored using radio soundings during the airborne acquisitions and completed with continuous measurements from on-ground stations. Finally, the last session was devoted to the validation of a thermo-radiative model. For this purpose, surface temperature sensors were installed at different locations of buildings walls supplemented by a thermal infrared images acquisition for one of the facades in order to continuously monitor its temperature during the 15 days of the experiment. The air temperature was also measured at different positions in the district (under trees, in flats, etc)