Geodesy

http://www.iag-aig.org
The International Association of Geodesy (IAG) is a scientific organization in the field of geodesy. 

http://www.ngs.noaa.gov/GEOID
Definition of the Geoid, latest models, online papers, and slide show presentations. 

http://geodesy.eng.ohio-state.edu
Geodesy at Ohio State University.

http://www.gpsworld.com/gpsworld
GPS World is international monthly journal that features news and applications of the Global Positioning System. 

http://www.colorado.edu/geography/gcraft/notes/gps/gps_f.html
GPS Tutorial by Peter H. Dana. 

http://europa.eu.int/comm/dgs/energy_transport/galileo/index_en.htm
GALILEO Europe's contribution to GNSS. 

http://igscb.jpl.nasa.gov
International GPS Service (IGS). The IGS is a global system of satellite tracking stations, Data Centers, and Analysis Centers puts high-quality GPS data and data products on line in near real time to meet the objectives of a wide range of scientific and engineering applications and studies.

http://www.ion.org
The Institute of Navigation is a non-profit professional society dedicated to the advancement of the art and science of navigation. 

http://www.gmat.unsw.edu.au/snap/gps/gps_links.htm
Satellite Navigation And Positioning (SNAP) from Academic staff members of the School of Surveying & Spatial Information Systems, University of New South Wales. 

http://www.navtechgps.com/supply/books.asp?Line=geodesy
Navtech books of geodesy. 

Hydrographic Survey

http://www.iho.shom.fr
The International Hydrographic Organization (IHO). 

http://pollux.nss.nima.mil/NAV_PUBS/APN/Chapt-30.pdf
Information about what Hydrographic Survey. 

http://www.ccom-jhc.unh.edu/shallow/abstracts/hydrography_isntalways.htm
Hydrography – Isn’t Always About Shallow Water? 

http://www.pamagic.org/DataStds/Current/DataStandards_Hydrography_05-22-02.pdf

http://chartmaker.ncd.noaa.gov/hsd/hydrog.htm

http://www.hydro-international.com

http://www.informationgenius.com/encyclopedia/h/hy/hydrographic_survey.html

http://www.thsoa.org/links.htm

http://www.scitechresources.gov/Results/show_result.php?rec=976

http://www.hydrographicsociety.org

Land Survey

http://www.surveying.mentabolism.org
Land Survey and Geomatics and the type of jobs. 

http://www.trimble.com
Surveying Equipment Company. 

http://www.encyclopedia.com/html/section/surveyin_TypesandBranchesofSurveying.asp
Definitions of Land Survey. 

http://igscb.jpl.nasa.gov/network/list.html
IGS Stations Network. 

http://www.leica.com
Geomatics Equipment. 

Photogrammetry

http://www.asprs.org

http://www.univie.ac.at/Luftbildarchiv/wgv/intro.htm

http://www.rspsoc.org

http://support.erdas.com/focus3/focus_on_photo.html

http://www.photomodeler.com

http://www.dli.wa.gov.au/corporate.nsf/web/satellite+imagery

http://www.surveyireland.ie

http://www.fgi.fi/osastot/foto/index_eng.html

http://www.geodetic.com/photogrammetry.htm

http://www.dot.ca.gov/hq/esc/photogrammetry/index.html

Digital Imaging

http://academic.emporia.edu/aberjame/airphoto/scan.htm
Digital Imagery vs. Scanning.

http://www.ziimaging.com/productPages/dmc.htm
Z/I Digital Mapping Camera.

http://gis.leica-geosystems.com/products/ads40/default.asp
ADS40 Airborne digital sensor from Leica.

http://merge.erdas-us.com/Products/files/ADS40_Brochure.pdf
ADS40 Brochure.

http://www.whittlespublishing.com/engineer/digi-aers.html
Review of "Digital Aerial survey theory and practice" book.

http://www.gisceu.com/U146.PDF
How one can select a digital camera for mapping.

http://www.gisdevelopment.net/technology/ip/mi04057.htm
Article "Fast Orthophoto production using the digital sensor system". 

http://www.gisdevelopment.net/aars/acrs/1999/ts7/ts7058.shtml
Article "A digital Airborne Camera for Photogrammetry".

http://imgs.intergraph.com/dmc
Digital Mapping Camera (DMC) from Z/I.

http://www.vexcel.com/products/ultracam.html
Vexcel UltraCam digitall aerial camera