Introduction The progressive grow...

Introduction

The progressive growth of techniques for data gathering and their impact forward topographic mapping can be divided into four phases. The first phase, before World War I, was characterized by the agency of numerous experiments using new techniques, frequently carried out by individuals, yet with little direct impact onward the making of maps. This phase was also single in kind of considerable cross-national cooperation. During the secondary phase, World War I, progres was mainly in the progression in a continuously ascending gradation of simple techniques to assist in the rapid production of maps to fit military needs. The third phase, the 1920 was individual of considerable technical development in instrumentation