旅行者

With the rise of Terrestrial Laser Scanning a decade ago and more recently Unmanned Aerial Systems (UAS), which are also called drones, the differences between how geodata is obtained by the surveyor in the field and by the photogrammetrist are fading. Conventionally, the crisp boundary separating the tasks of these two practitioners is as follows: the surveyor uses GNSS devices, mobile GIS handhelds, total stations and other tools while walking through the real landscape to collect the coordinates of characteristic points of features of interest. The photogrammetrist pushes buttons to digitise coordinates while sitting in the office in front of a Digital Photogrammetric Workstation (DPW).

今天的摄影测量软件允许高度automated creation of virtual landscapes. Added to this, the recent rocketing in popularity of UASs offers an alternative to surveying in the field. The data necessary for creating virtual landscapes can now be acquired from the air without requiring a huge budget. For the first time in the long history of photogrammetry, small areas can now be reliably captured by aerial surveys for an affordable price. By overlapping images, Digital Elevation Models (DEM) and orthomosaics – which are images with the geometric properties of topographic maps – can be generated highly automatically. An orthomosaic draped over a DEM results in a virtual 3D landscape which can be observed from many viewpoints and at many levels of detail by zooming and panning. From the comfort of an office chair, the surveyor can measure coordinates simply by clicking with the mouse. All this has become tangible because of the rapid advances in micro-electronics and subsequently sensor technology.

当使用新的技术繁殖时，公民和专业人士都可能会感到担忧甚至受到威胁。军事，国土安全和警察对隐私权的意义是什么？如今，关于侵犯权利和合法性的讨论在公共领域彼此之间互相翻滚。在地理学方面，从业者可能会担心新工具可能导致其职业的灭绝，因为外行将能够接管他们的工作。一种新型设备提出威胁而不是机会的情绪并不是什么新鲜事物。让我们征服那些原始的感觉。地理信息的生产由许多行动组成，整个链不能盲目进行。的确，任何人都可以收集地理塔，但核心挑战是安排各个步骤，以便在最短的时间和金钱的同时确保最终产品的质量。

工具，技能和知识是任何适当的Geodata获取的三脚架。任何人都可以购买工具，但是技能和知识需要在时间和大脑力量上进行大量投资，以吸收理论并获得技能。工具是帮助，但知识是黄金钥匙。进行航行。