[http://www.bayo.com/]
[./imag_aeropag.html]
[http://www.toposat.fr/gcp/ALCR08/ALCR08-01.pdf]
[http://www.spotimage.com]
[http://www.eurimage.com/gallery/webfiles/qb_cities.html]
Basically, there is hardly any difference between rectifying a satellite image and an aerial photograph. Therefore, please also consult our web page on that topic. The whole process has simply to be adapted to the image resolution. Reports delivered to the client are similar in both cases. Coordinates are usually provided in the global WGS84 system (latitude / longitude and UTM projection) but can also be determined in the local system (depending on the country in question). In this case, a summary of all parameters used (ellipsoid, shifts, type and parameters of the projection) is also supplied. Satellite image resolution In the field of satellite imagery, the different sensors (satellites) used can be classified according to: - their scan swath (i.e. the area covered by an image). - their resolution (i.e. the size of the smallest distinguishable object). The rule of thumb is: the higher the resolution, the smaller the scan swath. Of course the resolution has an influence on the kinds of objects that can be surveyed and on the difficulty of the survey task itself. Even a well-trained operator requires an extract of the image during the field work. Images that are now available on the market can reach resolutions close to half a meter as shown by the opposite image. To see other examples, please consult the website of Spot Image or Eurimage from where the images shown here come from. Logistic and regulatory aspects The major interest in using satellite images is that they can cover wide areas even in countries where aerial photography is subject to logistic or regulatory limitations. One must make sure, however, that it is permitted to rectify images using GPS.
Rectifying satellite images with GPS
Click on a picture to enlarge
NearToledo (Spain) Resolution 70 cm
Rome, St Peter's & Vatican City Resolution 70 cm
[./mnu_legalpag.html]
[./mnu_sitepag.html]
[./mnu_privatepag.html]
[./mnu_liens_1pag.html]
[./mnu_liens_2pag.html]
[./mnu_liens_3pag.html]
[./mnu_liens_4pag.html]
[./mnu_liens_5pag.html]
[./mnu_liens_6pag.html]
[./mnu_downloadpag.html]
[./mnu_contactpag.html]
[./indexpag.html]
TopoSat - Topography by Satellite
[http://www.toposat.fr/pages/imag_satpag.html]
[./indexpag.html]
[./soc_presentationpag.html]
[./soc_historiquepag.html]
[./soc_moyenspag.html]
[./soc_referencespag.html]
[./topo_canevaspag.html]
[./topo_calagepag.html]
[./imag_aeropag.html]
[./topo_planspag.html]
[./topo_pointspag.html]
[./topo_profilspag.html]
[./topo_mntpag.html]
[./metier_aeropag.html]
[./metier_agripag.html]
[./metier_tppag.html]
[./metier_lignespag.html]
[./metier_inondationspag.html]
[./metier_golfpag.html]
[./imag_aeropag.html]
[./imag_satpag.html]
[./imag_gcppag.html]
[./imag_drappag.html]
[./inge_ccaopag.html]
[./inge_equippag.html]
[./inge_softpag.html]
[./inge_fichierpag.html]
[./forma_agripag.html]
[./forma_topopag.html]
[./forma_gpspag.html]
[./forma_geodpag.html]
[./forma_gpspag.html]
[./topo_mntpag.html]
[./inge_fichierpag.html]
[./topo_canevaspag.html]
[./imag_satpag.html]
[./metier_golfpag.html]
[./topo_pointspag.html]
[./topo_planspag.html]
[./metier_aeropag.html]
[#ANCHOR_ButHautPage]
[Web Creator] [LMSOFT]