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A digital elevation model (DEM) or digital surface model (DSM) is a 3D computer graphics representation of elevation data to represent terrain or overlaying objects. A digital terrain model (DTM) represents specifically the ground surface while DEM and DSM may represent tree top canopy or building roofs.
A contour line of a function of two variables is a curve along which the function has a constant value. It is a plane section of the three-dimensional graph of the function of parallel to the-plane. Contour maps show the elevations of these surface features, which allows you to look at a two-dimensional map to visualize the Earth in three dimensions.
An orthophoto is an aerial photograph or satellite imagery geometrically corrected (“orthorectified”). such that the scale is uniform: the photo or image follows a given map projection. Unlike an uncorrected aerial photograph, an orthophoto can be used to measure true distances, because it is an accurate representation of the Earth’s surface, having been adjusted for topographic.
A drone 3D model refers to a digital spatial model that is created by using aerial images taken by a drone. The process of taking aerial images to make models and maps is called aerial photogrammetry. Drones are used to scan landmasses, buildings, construction sites, and anything else at height. These images are then converted into an accurate drone 3D model using 3D modeling software.
A point cloud is a digital representation of 3-dimensional reality. It’s formed by scanning a 3-dimensional scene or object with thousands of beams of laser light, using a technology called LiDAR. Point clouds are used for many purposes, including creating 3D (CAD) models for manufactured parts, for metrology and quality inspection, and for a multitude of visualizing, animating, rendering, and mass customization applications.
2D Maps are two-dimensional images that are typically mapped onto the surface of geometric objects, or used as environment maps to create a background for the scene. The simplest 2D maps are bitmaps; other kinds of 2D maps are generated procedurally. The 2D Map view is ideal for working with True orthos, orthomosaics and digital surface models and is the default view for projects.
Volume measurement is an extremely fast, accurate and cost-effective method to analyze volumes on your maps from any device. Volumetric can be used to estimate the amount of material that needs to be removed (or added) from a project site, measure stockpiles and quarries, or determine the amount of land needed for construction projects.
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