What is WMS?
WMS, or Web Map Service, is a standard protocol for serving geospatial images from a central WMS server. These images, commonly referred to as map tiles, can then be overlaid on top of a map to add new dimensions of data.
A WMS server can have many different layers that represent these independent sets of data. These layers can be selectively chosen and then combined by the WMS server to form a single, composite view of the data that is relevant to you and your customers.  You can think of these layers as separate panes of glass that have different map features drawn on them which can then be stacked on top of each other to compare and contrast different dimensions of data.
WMS in CMaps Plugin & GMaps Plugin
To use WMS in GMaps Plugin you must have access to a WMS server via a URL. If you are trying to access your own WMS server your IT personal should be able to provide this to you. Keep in mind that your companies firewall policies apply to any public WMS servers you try to access. The URL will typically look something like this:
Example:Â http://webservices.nationalatlas.gov/wms/people
Read More About WMS Connectivity
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