Introduction to cesium

Article item

   1. What is? Cesium？

   2.Cesium What can be done ？

   3.Cesium The dependence of

   4.Cesium Learning reference

Cesium General catalogue of practical series articles ： Portal

1. What is? Cesium？

Cesium yes AGI The company's computer graphics development team and 2011 Open source 3D Earth and map visualization developed in JavaScript library ,Cesium The word comes from the chemical element cesium , Cesium is a key element in making atomic clocks , The R & D team emphasizes... Through naming Cesium Keep improving the products , Focus on time data visualization .Cesium It's three-dimensional GIS It provides an efficient data visualization platform . namely ：
（1）Cesium It's a cross platform 、 Cross browser display of 3D Earth and map JavaScript library
（2）Cesium Use WebGL For hardware accelerated graphics , No plug-in support is required when using .
（3）Cesium Is based on Apache2.0 Licensed open source programs , It can be used for commercial and non-commercial purposes free of charge .

 2.Cesium What can be done ？

Cesium The knowledge system of , Span GIS、Web Front end and graphics .
Cesium For geographic data visualization . Support efficient rendering of massive data , Support 3D visualization of time series dynamic data , With the sun 、 The atmosphere 、 Dynamic simulation of geographical environment elements such as clouds and mapping of terrain elements . Contains a wealth of available tools . namely Cesium Tools provided by basic controls , Such as geocoder , Layer selector, etc .
Cesium The positioning in the project is shown in the figure below ：

The main functions are ：
（1） Use 3d tiles Format Streaming loads various 3d data , Include tilt camera model 、 Three dimensional buildings 、CAD and BIM Outside and inside , Point cloud data . And support style configuration and user interaction .
（2） Visualization of global high-precision terrain data , Support terrain exaggeration effect 、 And the programmable contour and slope analysis effect .
（3） Support image layers of multiple resources , Include WMS,TMS,WMTS And timing images . Images support transparency overlay 、 brightness 、 Contrast 、GAMMA、 tonal 、 Saturation can be dynamically adjusted . Support image roller shutter comparison .
（4） Support standard vector format KML、GeoJSON、TopoJSON、 And the effect of vector on the ground .
（5） 3D model support gltf2.0 The standard PRB texture of material 、 Animation 、 Skin and deformation effects . Stick to the ground and highlight .
（6） Use CZML Support the display of dynamic time series data .
（7） Support various geometries ： spot 、 Line 、 Noodles 、 mark 、 Bulletin board 、 Cube 、 sphere 、 Ellipsoid 、 Cylinder 、 corridor 、 Pipe diameter 、 wall .
（8） Visualization effects include ： Shadows based on the position of the sun 、 Self shadow 、 Soft shadows .
（9） Support atmosphere 、 Fog 、 The sun 、 The sun 、 The moon 、 The stars 、 Surface of the water .
（10） Particle effects ： smoke 、 fire 、 spark .
（11） terrain 、 Model 、3d tiles Face clipping of the model .
（12） Object selection and terrain selection .

（13） Support zoom of mouse and touch operation 、 Rendering 、 Inertial translation 、 flight 、 Any perspective 、 Terrain collision detection .
（14） Support 3d The earth 、2d Map 、2.5d Columbian mode .3d The view can be projected in perspective and front view .
Support points 、 mark 、 The aggregation effect of bulletin board .

3.Cesium The dependence of

① be based on HTML5 standard , No plug-ins , Cross platform
② Can't run independently , Browser dependent
③ Browser based on HTTP agreement ,Cesium Correct operation must have HTTP Server
④HTTP Server The implementation of is not limited to the development language and server （ Don't learn nodejs）

4.Cesium Learning reference

Cesium As a three-dimensional GIS Develop the hottest front-end framework , In 3D data management 、 3D terrain analysis 、 Dynamic scene visualization is widely used .

Cesium The available reference documents for learning are ：
1. Official website API file ： Official website
2. Official website sandbox example ： Official website
3.Cesiumlab
4.Cesium Chinese net
5. Some blog posts shared by learners

Last , I hope you can use Cesium Three dimensional GIS Develop friends to learn and progress together ！

Link to the original text ：https://blog.csdn.net/weixin_45782925/article/details/122687181