![]() ![]() Walk Over Survey (WOS) has been conducted for the selected route alternative. Angle point coordinates have been imported to that device to start field work. To identify the angle point on the ground we need navigation device, we have used hand-held GPS device of 3m -10m tolerance level. Route alignment survey has been initiated on recci survey data. Sample Combined Geo-referenced Toposheet Images along with Bee Line Image enclosed below shows merged geo-referenced Toposheet imageries. Toposheets are available either in paper format or image (digital) format at a nominal price and processing of these maps becomes much easier and least expensive. Image processing technology using satellite imageries also becomes expensive, as procuring the satellite images and processing of the same, have its own overheads. So from the economical point of view, this is not viable. ALTM technology is the most expensive as compared to the other two technologies. Image Processing using Survey of India Toposheet imageries.Īll of these above mentioned technologies need the base maps to commence the reconnaissance survey.Image Processing using high resolution satellite imageries. ![]() ALTM (Airborne Laser Terrain Modelling).The route alignment can be done with either of the below mentioned technologies: This is the initial phase of the transmission line construction activity. ![]()
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