3D GIS

Oblique Photogrammetry

Oblique image is the image captured by titled aerial camera. Oblique photogrammetry technology is a new high-tech technology developed in the international mapping & remote sensing industry. Oblique photogrammetry captures images from orthogonal and 4 tilted directions through multiple sensors placed on a flying platform. The process of generating 3D models using oblique photogrammetry is oblique photogrammetry modeling.
 
 
Figure 1 Oblique photogrammetry

1. Data Loading

With the features of oblique photogrammetry models, combing with the advantages of 2D GIS, SuperMap 3D GIS realized basic functions of 2D & 3D integration of oblique photogrammetry model, also providing multiple 3D spatial analysis functions and model flattening and surface digging.
Oblique photogrammetry modeling can generate multiple models, including universal formats like obj, osg(osgb), dae, SuperMap supports OSGB oblique photogrammetry files, which has 20- layer detail level of pyramid model, fully utilizing its LOD structure, accelerating model loading, and supports any other partition format, like quadtree, octree, arbitrary.
 
Figure 2 Loading oblique photogrammetry data in SuperMap iDesktop

2.Overlay Vector Data

Combining with 2D GIS advantages, SuperMap GIS chooses overlaying 2D vector to realize oblique photogrammetry model basic functions: like query attribute by map, query map by attribute, thematic map creating, model flattening, etc.
 
Figure 3 2D & 3D function

3.3D Analysis Functions

SuperMap GIS supports multiple 3D analysis functions, like visibility analysis, (dynamically) inter-visibility analysis, skyline analysis, shadow rate statistics analysis, profile line analysis, etc. 
 
Figure 4 3D analysis function

4. Mobile Terminal

SuperMap GIS also supports displaying oblique photogrammetry model and 2D & 3D application on mobile terminals.
 

5. Divide Floors and Units

SuperMap GIS supports dividing stories and units in oblique photogrammetry models, through configuring the absolute altitude and stretched altitude, layer style, the dividing of floors and units can be realized.
 

Figure 5 Selected floor of building
For detailed information, refer to technical document ˇ°SuperMap Solution for Oblique Photogrammetryˇ±, http://www.supermap.com/en/html/SuperMap_GIS_TechnicalDocuments.html
Or visit online tutorials: http://www.supermap.com/en/html/SuperMap_GIS_TechnicalDocuments.html  
 
 

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