| spie.org | Spie--the International Society For Optical Engineering. The Optics, Photonics, |
| ucsb.edu | National Center For Geographic Information & Analysis (ncgia) |
| icaci.org | International Cartographic Association |
| cartography.org.uk | The British Cartographic Society |
| soc.org.uk | Society of Cartographers |
| rics.org.uk | RICS- Royal Institute of Chartered Surveyors |
| ovg.at | Ovg - Vermessungwesen Und Geoinformation, Vgi |
| rgs.org | The Royal Geographical Society |
| poweredparaglider.com | PoweredParaglider.com |
| pilotphoto.com | Custom Aerial Photography |
United Kingdom , ,