With the growing demand for urban information services, urban informatization is rapidly evolving from two-dimensional to three-dimensional modeling. Currently, most urban 3D models are created using on-site photography, manual geometric modeling, texture mapping, and baking techniques. This process involves manual measurement of topographic maps, with operators taking cameras to the field to capture images. Then, software like 3ds Max and Sketching Masters is used to reconstruct these images into 3D models—a truly labor-intensive effort.
For a medium-sized city covering 300 to 400 square kilometers, such a project typically requires the work of two to three hundred people and takes at least one to two years to complete. This approach is costly, time-consuming, and challenging to maintain consistent data quality.
Clearly, if we can leverage oblique images for automatic ground analysis and DSM generation, utilizing their rich and detailed ground texture information for texture modeling, the efficiency of 3D modeling would significantly improve. What traditionally takes one or two years to complete with manual methods can be accomplished within just three to five months through oblique photography modeling, greatly reducing both economic and time costs associated with 3D data collection.
Oblique photography technology is a high-tech method developed in recent years in the fields of international surveying and remote sensing. By mounting multiple sensors on the same flight platform and capturing images from various angles—including vertical and oblique views—it obtains more comprehensive and accurate information about ground objects.
This breaks through the limitations of traditional aerial surveys, which use single cameras capturing only vertical orthoimages. Oblique photography is widely applied in enterprise factories, large building complexes, garden construction, scenic area planning, geomorphological exploration, and large-scale open-pit mining.
Tilt photogrammetry technology captures complex scenes with large-scale, high-precision, and high-definition data. The results, obtained through efficient data acquisition equipment and professional processing workflows, clearly reflect the appearance, position, height, and other terrain attributes.
This technology enhances the immersive experience provided by 3D data and overcomes the low realism often seen in traditional manual modeling. It guarantees realistic visual effects and surveying-level accuracy, bringing revolutionary improvements in efficiency to the surveying industry.
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