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Le blog d'Alexandre Cazaux. Suite à l’article présenté sur ce blog, regardons si mes pronostics se sont avérés justes … Ce mercredi soir, Google a présenté les nouvelles caractéristiques de Google Maps / Google Earth.

Le blog d'Alexandre Cazaux

LD Fiche photogrammétrie par drone V2. Aerial Photography Camera Tips, Tricks and Best Settings. With drone aerial photography, it is important to use a camera which is proven and recommended so you get the best photos every time.

Aerial Photography Camera Tips, Tricks and Best Settings

Understanding camera settings such as ISO, shutter speed, aperture, focus and metering along with gimbal stabilization are all important factors to obtaining crisp sharp professional aerial photos. In this article we explain in simple language what each camera setting is and the best recommended settings for aerial photography.

The below camera knowledge is good to have for both aerial and land based photography. I have added in couple of knowledgeable aerial photography videos as well. Another excellent article on how to aerial film people will also improve your filming and photography skills. These Monier. Vertical Aerial Photographs. Available languages — Vertical aerial photographs are valuable sources of data for OpenStreetMap.

Vertical Aerial Photographs

While surveying by collecting GPS tracks is the primary way for collecting data, tracing features from an overhead photograph makes inputting vast amounts of data quicker to be filled in and verified later via on-the-ground surveying. A couple of prominent examples of OSM data initiated via tracing from photos are the Gaza Strip and Baghdad. These photographs are usually taken from satellites. Companies like DigitalGlobe and GeoEye and U.S. Aerial photographs can also be obtained from airplanes equipped with cameras or even balloons, or even any airborne device fitted with a camera. Sources already in use Bing Bing (Microsoft) gave us special permission to use their imagery to create our maps. User:Balrog/Aerial Imagery/Rectification. This HOWTO describes one of many ways to process aerial imagery so that it's suitable for mapping.

User:Balrog/Aerial Imagery/Rectification

Actual action items are highlighted in yellow so it's easier to find them. Once you have made aerial pictures, and if you're an OSMer, you probably want to see them rectified and displayed as an OSM editor background for tracing or on your website displayed as the map's background, like in Google Maps, Bing maps, Yahoo maps, etc. That's what I wanted anyway, and what the grassrootsmapping.org people do for some of their projects. This is purely a software task and to many people will be less fun than flying a kite for example. Background (skip this) I explored various existing ways but haven't found a satisfying tool to do this, but I applied some criteria that other people might not care about: Introduction To UAV Photogrammetry And Lidar Mapping Basics.

UAV lidar and photogrammetry imaging applications are increasing rapidly.

Introduction To UAV Photogrammetry And Lidar Mapping Basics

This is not surprising as using GPS enabled UAVs for aerial surveying is very cost effective in comparison to hiring an aircraft with photogrammetry equipment. Because UAVs are relatively inexpensive, many organisations will have their own fleet, allowing for rapid surveys over large land areas where required. With GPS-equipped drones, digital cameras and powerful computers, surveys with an accuracy down to 1 to 2 cm is very possible. In this post we take an overall look at this technology and the sectors benefiting from using UAVs for photogrammetry and lidar mapping. We also discuss the drones on the market and the compatible software. The use of quadcopters and multirotors in photogrammetry and lidar mapping is still in the very early stages. If you are interested in pursuing a UAV photogrammetry business or similar, buy the best quadcopter and sensors you can. Anaglyphe. Un article de Wikipédia, l'encyclopédie libre.

Anaglyphe

Un anaglyphe (en grec ancien : « ciselure en relief », « bas-relief », « ouvrage sculpté », composé d’ana, « du bas vers le haut » et de glyphe, « ciselure ») est une image imprimée pour être vue en relief, à l’aide de deux filtres de couleurs différentes (lunettes 3D) disposés devant chacun des yeux de l’observateur. Ce principe est fondé sur la notion de stéréoscopie qui permet à notre cerveau d’utiliser le décalage entre nos deux yeux pour percevoir le relief. Vue anaglyphique, présentant un relief bien perceptible (lunettes bicolores nécessaires : le rouge à gauche). Orthophotographie. Un article de Wikipédia, l'encyclopédie libre.

Orthophotographie

Les orthophotographies ou orthoimages sont des images aériennes ou satellitales de la surface terrestre rectifiées géométriquement et égalisées radiométriquement. Stéréoscopie. Un article de Wikipédia, l'encyclopédie libre.

Stéréoscopie

La désignation récente « film en 3D » est employée par anglicisme et par méconnaissance de la terminologie correcte : film stéréoscopique ou film en stéréoscopie. La stéréoscopie est née juste avant la photographie (le stéréoscope de Wheatstone a été publié quelques mois avant les travaux de Daguerre et de Fox Talbot), bien que des traces plus anciennes dans des interrogations et expérimentations picturales soient trouvées. Ainsi, la collection Jean-Baptiste Wicar du Palais des beaux-arts de Lille conserve deux dessins distinguant les visions d'un même sujet pour chaque œil, exécutés par Jacopo Chimenti, peintre de l'école florentine (1554 - 1640).

Un couple de dessins en stéréo du XIIIe siècle a même été retrouvé dans une bibliothèque à Oxford (Gérard Fieffé, Bulletin du Stéréo-Club Français, no 673, octobre 1983).