Orthophoto

Feiyan Remote Sensing specialises in high-resolution orthophoto map processing including digital orthophotos and orthophoto mosaics from raw aerial survey photography and digital image capture. Orthophotos combined with a topographic mapping project give a precise reference backdrop tool that enhances the users understanding of any project area. Combined into orthophoto mosaics the imagery can cover large areas such as a catchment, river basin, highway or even local government area. Process of Orthophoto Data Processing Orthophoto data processing is the process of converting aerial photographs into a georeferenced and orthorectified image, which can be used in geographic information systems (GIS) or other mapping applications. The steps involved in orthophoto data processing typically include the following: ● Image acquisition Aerial photographs are taken using a camera mounted on an airplane or drone. ● Image calibration The photographs are calibrated to account for camera distortion and other factors that may affect the accuracy of the resulting image. ● Image matching The photographs are matched to each other to create a seamless mosaic of the entire area being mapped. ● Digital elevation model (DEM) creation A DEM is created using LiDAR or other data sources to provide information on the elevation of the terrain. ● Orthorectification The aerial photographs are orthorectified using the DEM, which involves correcting for perspective distortion and other effects to produce a map-like image that can be used for accurate measurement and analysis. ● Color balancing The colors of the orthophoto are balanced to ensure accurate representation of the terrain and objects being mapped. ● Quality control The orthophoto is reviewed for accuracy and any errors or issues are corrected. The resulting orthophoto data can be used in a variety of applications, such as land use planning, environmental monitoring, urban development....

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