Display terrain database on osgearth ball

osgEarth The terrain database is displayed on the ball

This article shows a method by DSM and DEM obtain Osgb engineering , And in osgEarth The method shown on the ball . among DSM、DOM To Osgb The conversion of the project is made by VPB(VirtualPlanetBuilder) To achieve , And USES the Model The layer will Osgb The project shows on the ball .

This article mainly solves the following problems ：

1. VPB compile
2. VPB Generate terrain
3. The terrain is displayed on the ball

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Catalog

• 1 Preface
• 2 VPB Compiling and using
• 3 Terrain in osgEarth The ball shows

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Content

• 1 Preface

VirtualPlanetBuilder Is an open source code tool , It is used to create and... Based on geospatial images and digital elevation models OpenSceneGraph Compatible large-scale paging database . About OpenSceneGraph Introduction to , Please refer to its official website http://www.openscenegraph.org/, It's not detailed here ; In use , By inputting orthophoto and digital elevation model , Can generate a terrain Osgb engineering 、 Or store it in the database （osga), At the same time, its coordinates can be output to the ordinary coordinate system （ Such as longitude and latitude 、 Projection ）, It can also be output as spherical coordinate system .

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