A box, room, or device (a darkened enclosure) that has a small hole (an aperture, maybe with a lens) through which light from external objects enters to produce an image on an opposite surface is ...

The improvements in instruments made possible by better designs and by increasing precision of manufacture whereby the degree of accuracy has risen from 1 in 5,000 to 1 in 30,000, cause changes to ...

On a glorious sunny June day we reached the summit of Céidín, south of the Glen of Imall, to find a triangulation station or trig pillar. These concrete pillars are found on many prominent peaks ...

Say what you will about the past few years, it has produced some useful tools for the surveyor. First, LiDAR technology made it possible to collect high-density 3D data with spectacular speed, so that ...

Since the first protractors appeared near the turn of the 17th century, around the same time that the technique of triangulation was developed for surveying, their utility for this activity appeared ...

THIS work is already well known as a standard book on the subject of geodetic surveying; and the new edition should go far to uphold the reputation of the old. The diagrams and photographs are clearly ...

A silent, educational film about Second Order Triangulation would explore how this intermediate stage in establishing accurate survey frameworks refines and densifies the primary geodetic control ...

The presence of the unique “0 mile stone” of Pune will finally be acknowledged and accorded its full glory once again. Inauguration of Zero Stone in Pune on Friday, September 6. (Pratham Gokhale/HT ...