Jumaat, 18 Mac 2011

Type of Land Survey Work

Type of land survey work

1. Title Survey

?         Survey of Land for Building.
?         Survey for Subdivision of Building (Strata Title)
?         Survey of Land for Agriculture
?         Survey of Land for Mining
?         Underground Survey (Stratum)
?         Survey for Amalgamation of Lots
?         Survey of Land for Special Purposes
?         Survey for the Purpose of Land Acquisition
?         Survey of Administrative Boundaries
?         Control Traverses
?         Point Positioning by Satellite (GPS)

2.Engineering Survey
?         Highway,Road Alignment and Railways
?         Road Deviation, Earth Volume (Cut and Fill)
?         Tunnel Survey and Dam Construction.
?         Building and Deformation Survey
?         Monitoring Survey
?         Survey Waterways

3.Construction Survey
?         Piling Setting Out and As-Built Survey

4. Topography Survey
Topographical survey involves the generation of contours and the production of Digital Terrain Models.  Such services are required by engineers and designers to help calculate volume for earthworks (cut and fill).  With the advent of computer technology most of our clients want data in digital format, usually ASCII and MOSS.

5. Digital Mobile Mapping
-  Digital Video Mapping
-  Laser Radar Mapping (LIDar)

6. Aerial Photogrammetry
Photogrammetric surveys are employed to help identify the general topography of the area of investigation before one engages the field survey units.  It is also used now to gather the latest ground information for the complication of GIS data.  Photo mosaics produced help identify routes for new highways, transmission lines, gas pipelines etc.  This method can ensure that the designed route will not pass over residential areas, sites of sensitive nature such as cemeteries, schools and historical sites.  Photogrammetry will only be cost effective if the area of coverage is very large.

7Geographic Information System (GIS)
 GIS design and implementation. GIS is a very costly venture, normal surveyor will advise clients to enable them to get what they want without spending too much on hardware and software.  and them of in-house and contract programmers will help clients to develop their own unique GIS database.  there also ensure that further development and enhancement of the GIS packages made possible as their need for a much more complex analysis surfaces.  Spatial data comes from various sources such as existing maps, aerial photography, certified plans and standard sheets etc.

8. Global Positioning System (GPS)
GPS system provides Graphics Module and direct link to the GIS applications.  Data can be process as Fast Static, Static, Rapid Static, Kinematic and Semi-kinematic.  The module allows you to analyse and edit your final positions, lines and polygons before your export them, along with descriptive data, into standard GIS formats (Arc Info., Shapefile, DXF, etc). ASCII generic formats are also supported.

9Hydrographical and Harbour Surveys
Hydrographic surveying can be loosely as offshore land surveying.  Surveys engaged helps engineers to identify the seabed / riverbed topography.  Contours are also produce to enable them to quickly visualize the bed profile.  For the dredging purposes  usually survey in front of dredger and feed the depth information on-line and will resurvey the path to ensure that the new depth is as required.

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