View source for Surveying, Mapping and GIS Applications

{{Article Infobox2
|Category=Applications
|Editors=GMV
|Level=Basic
|YearOfPublication=2011
|Title={{PAGENAME}}
}}
One of the most obvious uses for GNSS systems is the realization of surveys and production of maps. Although a simple standalone [[:Category:Receivers|GNSS Receiver]] might not have the required precision for some survey requirements, most of these requirements can be fulfilled using high-end dual frequency multi-constellation receivers built specifically for surveying and by using [[GNSS Augmentation]] techniques.  

The use of GNSS techniques in geodesy have revolutionized the way geodetic measurements are made. An increasing number of national governments and regional organizations are using GNSS measurements as the basis for their geodetic networks<ref> [http://www.oosa.unvienna.org/pdf/publications/st_space_24E.pdf GNSS Follow-up to the Third United Nations Conference on the Exploration and Peaceful Uses of Outer Space (UNISPACE III) - Report of the action team on Global Navigation Satellite Systems (GNSS)], UN, ST/SPACE/24, 2004.</ref>.  


== Land Surveying == 

[[File:Surveying in Pencoed.jpg|right|thumb|200px|Land surveying]]

Land Surveying is a technique and science of accurately measuring the distances and angles between different points, on the surface of Earth. GNSS has been used by land surveyors since the late 1980s, primarily for geodetic control networks and for photo control<ref name ="rics">[http://www.cnavgnss.com/uploads/Guidelines_for_the_use_of_GNSS_in_surveying_and_mapping.pdf Guidelines for the use of GNSS in land surveying and mapping], Royal Institution of Chartered Surveyors (RICS), Practice Standards, 2010</ref>.

Nowadays, GNSS is used to determine precise locations all over the globe, in any weather conditions and at any time of the day. GNSS geodetic surveying equipment has become smaller and easier to use being faster to use than other surveying methods. GNSS is specially used for large topographic surveys where a centimeter level accuracy is enough<ref>[[Wikipedia:Surveying|Surveying on Wikipedia]]</ref>.

Detailed information about Land Surveying can be found [[Land Surveying|here]].

== Mapping & GIS == 
[[File:GvSIG - GIS.jpg|right|thumb|200px|Mapping & GIS]]
Mapping and GIS applications allow to capture, store, manipulate, analyze, manage, and present all types of geographically referenced data<ref>[[Wikipedia:Geographic information system|Geographic information system in Wikipedia]]</ref>. GIS technology combines database, mapping and statistical methods to integrate georeferenced data into visual displays where the relationships, patterns and trends in the data can be more easily identified<ref>[http://www.esri.com/what-is-gis What is GIS?], gis.com</ref>.

Although Mapping and GIS applications do not rely on GNSS as sole means for data capture, the widespread of the GNSS technologies has allowed for low-cost data acquisition processes that made GIS technologies to be more generally used.

Detailed information about Mapping & GIS can be found [[Mapping & GIS|here]].

== Aerial Surveys== 
[[File:P1040916.JPG|right|thumb|200px|Aerial Surveys]]

Aerial Survey is a form of collection of geographical information using airborne vehicles. The collection of information can be made using different technologies such as aerial photography, radar, laser or from remote sensing imagery using other bands of the electromagnetic spectrum, such as infrared, gamma, or ultraviolet. For the information collected to be useful this information needs to be georeferenced. The georeferencing of information is usually done using GNSS with similar techniques as the techniques used for dynamic land surveying.

Detailed information about Aerial Laser Profiling can be found [[Aerial Survey|here]].

== Notes ==
<references group="nb" />

==References==
<references/>


[[Category:Applications]]
[[Category:Surveying, Mapping and GIS Applications]]