Photogrammetry is a science and a technology because it uses images and modifies it, through technology, into significant results. The overlap is usually arranged to be 80% or more in the direction of travel (‘vertical overlap’) and 60% or more between adjacent rows of the grid pattern (horizontal overlap’). Photogrammetry presents a broad view of the project field, by classifying both topographic and cultural features. Each one of these components needs the utilization of various equipment, different measurement techniques, and different data processing. INTRODUCTION Before aerial photography and photogrammetry became a reliable mapping tool, planimetric and topographic mapping were primarily the products of the surveyor. It provides a wide mapped area so other line studies can perform with the corresponding data source more efficiently than other traditional methods. A successful photogrammetric survey project depends on a precise understanding of these components, Benefits and careful planning and execution of the project specifications. These kinds of projects can fly and photograph. It can relieve survey crews of the most tedious, time consuming tasks required to produce topographic maps and Digital Terrain Models (DTMs). The coordinates of each point in the mapping field can determine with no additional efforts or cost. A camera attached to a UAV is flown across the landscape in a regular grid pattern, while the camera acquires photographs at regular intervals. The practice of Photogrammetry Applications in surveying includes siteplanning, topographic mapping, earthwork volume estimation for proposed roads, a collection of digital elevation models (DEM), and image-based mapping (orthophotography). The accuracy of the mapping contours and cross regions depends on flight height and the efficiency of the field survey. While capturing the Aerial photographs, photogrammetry produces an actual & permanent photographic record of a particular condition that exists while capturing images. Introduction to Photogrammetry and Aerial Surveys WILLIAM T. PRYOR, Chief of Aerial Surveys Bureau of Public Roads # IN the present stepped-up program of highway construction, highway engineers face the reality that the usual survey methods on the ground are too slow for keeping abreast Photogrammetry has evolved into a reliable substitution of ground surveying activities when large area mapping is necessary. Applied to a series of aerial photographs taken from a moving camera, parallax allows us to accurately calculate the position (elevation as well as location) of a feature on the ground. Photogrammetry is an ideal surveying method for toxic areas where fieldwork may negotiate the safety of the surveying crew. ADDRESS : 2 CHAPEL VIEW, CADNEY LANE, BETTISFIELD, WHITCHURCH, WREXHAM SY13 2LU, Archaeological and Historical Site Surveys, Roof Inspection – Rebuilt 18th Century Windmill, Photogrammetric Image Acquisition with UAVs, What You Should Know Before Hiring a UAV Operator. by Adam Hanlon Monday, January 6th, 2020. This component can get eliminate if advanced GPS methodology can solve the photo orientation difficulty without requiring ground control. Ground survey EMAIL : enquiries@BladesAerialSurvey.co.uk The practice of Photogrammetry Applications in surveying includes siteplanning, topographic mapping, earthwork volume estimation for proposed roads, a collection of digital elevation models (DEM), and image-based mapping (orthophotography). Photogrammetry refers to art because to obtain reliable measurements it requires specific skills, techniques, and decisions taken by an individual. It is based on the principle of optical parallax, where an object will appear to be in a slightly different position relative to the viewer depending on the viewer’s location. The output from photogrammetry is typically a map, a drawing or a 3D model of some real world object or land mass.