Problems related to webgl

I have just come into contact with webgl,. I am a front-end developer. What is the relationship between webgl and webgis, and recently the company let me see openlayers.. What is the relationship between this and the above? ask the great gods for guidance

Feb.28,2021

1.webgl is for image rendering
2.Web GIS is for geographic information systems, and it's two different things
3. Learn to use search engines

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b32516-2bde9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32516-2bde9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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