Surveying Glossary — Letter D
Các thuật ngữ chính trong trắc địa chuyên nghiệp và công nghệ địa không gian.
A portable electronic device used in surveying to record, store, and process measurement data collected from surveying instruments such as total stations and GNSS receivers.
Datum transformation is the mathematical process of converting geographic coordinates from one reference system to another by applying rotation, translation, and scale parameters.
Deformation monitoring is the systematic measurement and analysis of structural or ground movements over time to detect, quantify, and predict potential failures or safety risks.
A digital representation of terrain surface elevation data, typically in raster or vector format, derived from various surveying and remote sensing techniques.
Differential leveling is a surveying method that measures elevation differences between points using a level instrument and graduated rods to establish accurate vertical distances across distances.
Direct georeferencing is a surveying method that determines the precise geographic coordinates and orientation of an airborne or terrestrial sensor platform in real-time using integrated GNSS and inertial measurement systems.
An automated navigation and control system that enables unmanned aerial vehicles to execute pre-programmed surveying missions without continuous manual pilot intervention.
Drone flight planning is the process of designing and programming optimal flight paths, waypoints, and parameters for unmanned aerial vehicles (UAVs) to conduct surveying missions with precision and efficiency.
Drone geofencing is a virtual boundary technology that automatically restricts unmanned aerial vehicle (UAV) operations within predefined geographic limits to ensure safety, regulatory compliance, and data integrity in surveying applications.
A Digital Surface Model (DSM) is a raster representation of terrain that includes all surface features such as buildings, vegetation, and natural topography.
A Digital Terrain Model (DTM) is a digital representation of Earth's surface elevation that excludes artificial structures and vegetation, created through surveying data collection and processing.
DXF (Drawing Exchange Format) is a standardized file format used to store and exchange 2D and 3D vector graphics and survey data between different CAD and surveying software applications.