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Jul 03, 2023What is Digital Surface Model
Digital Surface Model (DSM) refers to a ground elevation model that includes the heights of surface buildings, bridges and trees. Compared with DEM, DEM only contains the elevation information of the terrain and does not include other surface information. DSM is based on DEM and further covers the elevation of other surface information except the ground. In some areas where there is a demand for building height, it has received a lot of attention. More > -
Jun 30, 2023
How to build DEM
There are many DEM interpolation methods, mainly including overall interpolation, block interpolation and point-by-point interpolation: More > -
Jun 29, 2023
Problems and solutions encountered in laser point cloud data processing
When using a 3D laser scanner to scan a target, it will be affected by the scanning equipment, surrounding environment, human disturbance, target characteristics, etc., making the point cloud data inevitably have some noise, resulting in the data not being able to correctly express the spatial position of the scanned object. More > -
Jun 28, 2023
What can LiDAR point cloud data be used for?
Through automatic preprocessing of point cloud data, ground filtering, combined with manual editing, the laser point cloud is further finely classified, the ground points are retained, and the remaining ground points are rasterized by building a model such as an irregular triangular network (TIN). High-precision digital elevation model (DEM) data can be obtained, and can also be converted into contour data. More > -
Jun 27, 2023
What are the applications of UAV aerial photogrammetry in terrain mapping?
In order to adapt to the current form of national basic surveying and mapping work, UAV aerial photogrammetry technology has been widely valued by people. UAV aerial photogrammetry makes up for the shortcomings of traditional surveying and mapping technology, and plays a huge role in the current stage of topographic mapping. More > -
Jun 26, 2023
Application of Aerial Photogrammetry in Water Conservancy Engineering Terrain Surveying and Mapping
aerial photogrammetry technology plays an active role in urban planning and construction, especially in water conservancy engineering design. Among them, the most scientific method to obtain topographic surveying and mapping data of water conservancy projects is aerial photogrammetry. More >
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