您好，Client for OpenLayers默认支持EPSG:4326，EPSG:3857、平面无投影坐标系，不需要自己定义，只需要在对接地图的时候在地图参数中设置对应的坐标系即可。对于默认不支持的坐标系在iClient for OpenLayers中需要先用proj4定义坐标系、然后将定义的坐标传给地图的坐标系参数，具体加载过程可以参考这篇博客：https://blog.csdn.net/supermapsupport/article/details/101348811?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164300456016780271954139%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fblog.%2522%257D&request_id=164300456016780271954139&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~blog~first_rank_ecpm_v1~rank_v31_ecpm-2-101348811.nonecase&utm_term=%E5%9D%90%E6%A0%87%E7%B3%BB&spm=1018.2226.3001.4450
