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From 2004 and 2007, the  CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) agency sponsored eproject E-foto. Nowadays, other institutions provide support to the project, mainly UERJ (State University Rio de Janeiro), with grants for thecnical support (PROATEC), undergraduate research and trainee. The Brazilian Army (Exército Brasileiro/ Diretoria do Serviço Geográfico) also have sponsored this project by a cooparation to the develpment of the photogrammetric module of the project  SIG-Desktop.


We also are grateful to other institutions wich have provided support to us: Funcate, Instituto Militar de Engenharia , Instituto Brasileiro de Geografia e Estatística, Companhia de Pesquisa de Recursos Minerais, Instituto Municipal de Urbanismo Pereira Passos and TopoCart.


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This document shows the workflow of a photogrammetric project under e-foto.


Project Creation and Management

modulogp1iconThe Project Management module is responsible for creating, maintaining and ensuring the integrity of a digital photogrammetric mapping project.


Interior Orientation

efotomodulooriantacaointerioriconThis module aims to reconstruct the internal geometry of the internal perspective rays of the camera, which does the image referencing (image plane) in relation to the camera (the camera optical axis). The Interior Orientation must be run for each photogrammetric images. To follow this tutorial you need the .epp file generated in the project management tutorial.


Exterior Orientation by Space Resection


This module allows users to determine the object-space coordinates of the center of perspective and attitude angles of the camera at the time of the acquisition of the photographic image. The Exterior Orientation should be performed for each photogrammetric image based on the object-space reference.


Exterior Orientation by Phototriangulation

efoto02Phototriangulation is a technique for calculating and adjusting perspective center coordinates and sensor attitude angles at the time images were acquired. This allows the reconstruction of spatial (terrain) coordinates from imagery.


3D Photogrammetric Restitution (Stereo Plotter)

efoto03This module aims to achieve three-dimensional photogrammetric restitution of the land surface represented in a stereoscopic model.


Digital Elevation Model Extraction

efoto01This module allows users to extract a Digital Elevation Model from a set of imagery belonging to a photogrammetric project. In other words, it creates a 3D model of a section of land.



efotoortoAn orthoimage is, by definition, an image geometrically corrected ("orthorectified") such that the scale is uniform: the photo has the same lack of distortion as a map.


Integration with QGis

In this tutorial we will explain the integration of the e-foto products with QGIS.Quantum GIS