Updating Statistical maps with GPS

Global Positioning System Space segment Control segment Users Segment

GPS Satellites Name: NAVSTAR Manufacturer: Rockwell International Altitude: 10,900 nautical miles Weight: 1900 lbs (in orbit) Size:17 ft with solar panels extended Orbital Period: 12 hours Orbital Plane: 55 degrees to equatorial plane Planned Lifespan: 7.5 years Current constellation: 24 Block II production satellites Future satellites: 21 Block IIrs developed by Martin Marietta Space segment

Users Segment

Projection

Errors: Atmospheric error Clock & Orbit Error Multi path Error S.A. (Selective Availability) A.S. (Anti Spoofing) DOP(Dilution Of Precision)

Differential GPS

Positioning Methods: Static method Kinematic method Stop & Go method

Choosing suitable receiver:

Updating Statistical maps with GPS 1- Rural Maps (Scale 1:50000) 2-Urban Maps (scale 1:2000)

مرغداري حيدري Rural Maps:

Updating Roads:

Urban Maps:

Problems: in the urban areas the high buildings and trees were caused cycle slip and slowness the work.

Result: updating the urban and rural maps of 2 provinces.