"Construction surveying (otherwise known as ""lay-out"" or ""setting-out"") is to stake out reference points and markers that will guide the construction of new structures such as roads or buildings. These markers are usually staked out according to a suitable coordinate system selected for the project. It is basically to survey existing conditions of the future work site, including topography, existing buildings and infrastructure, and underground infrastructure whenever possible. The Basis for each project and each design is a survey. One could say that surveyors lay out the size of the stage on which architects and structural engineers enact the scene. With absolute precision as the top priority, the company’s surveyors guarantee this perfectionism through cutting edge technology combined with the latest technical innovations. With the help of these sophisticated methods they create the various types of surveys required in the construction process. EHAF offers a full range of professional surveying and mapping services. Through the use of topographic maps, aerial photographic interpretation, and other existing map sources. EHAF'S planners, geographers and CADD/GIS specialists can produce maps at scales and levels of detail appropriate to a variety of application. EHAF'S surveys are prepared to determine boundary lines, adjoins, lines of possession, conflicts, overlaps, land area …etc. Those surveys are able to develop horizontal and vertical information necessary for roads, utilities, drainage, commercial, industrial, retail and residential development, reservoirs, and treatment facilities. EHAF'S surveys utilize Aerial photographs and/or Satellite imagery from SPOT, IRS¬1C/D, Landsat, and IKONOS for feature collection, DTM (contour) generation, and Orthophoto production, in addition to digital map production with various scales. EHAF'S surveys extend their mapping experience through the use of the recent GIS (Geographic Information System) technology. EHAF'S engineers are capable of providing GIS ready digital maps, both in vector and raster formats, as well as developing GIS custom applications. All in all, when photogrammetric site surveys and surveys for the land registry are involved, the company’s surveyors will cooperate with the respective special lists. However, they never lose sight of one important thing which is the client’s very dream."