GITTA-Logo
PDF Version of this document Search Help Glossary

Lesson Navigation IconFundamental spatial concepts

Unit Navigation IconThe Scale

Unit Navigation IconGeoreferencing: Positioning and Projections

LO Navigation IconGeoreferencing

LO Navigation IconMap Projections

LO Navigation IconPositioning

Unit Navigation IconSpatial Relations

Unit Navigation IconTopology, fundamental concept

Unit Navigation IconSpatial Distance and Properties of the Environment

Unit Navigation IconGlossary

Unit Navigation IconBibliography

Unit Navigation IconMetadata


GITTA/CartouCHe news:


Go to previous page Go to next page

Positioning

Positioning establishes, by means of coordinates, a point's most exact position possible. Positioning is realized by the application of methods developed in the field of geodesy. The accuracy of the positioning depends on the means invested. The accuracy can be very high, in the range of millimeters compared to a reference. Nowadays the accuracy is not limited by technical obstacles anymore. It's enough to pay the price! In the GIS context, the optimal accuracy referring to the scale of the phenomenon which is studied has to be obtained. The conventional positioning tools are surveying and photogrammetry. For a couple of years now, there is the satellite positioning system available, provided by the United States Department of Defense. The accuracy is 5 to 10m in direct mode using a low cost receiver, or in the range of centimeters using a more expensive differential receiver. Since 2008 there is the European system named Galileo.

Top Go to previous page Go to next page