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Open GIS standards such as openstreetmap, cloudmade?

I am not familiar with a GIS (or map), but lately I need to do some work related to this field. I know some map providers: OpenStreetMap, CloudMadeMap, OpenCycleMap, OpenAerialMap ...

My questions are: do these card providers have the same standards? I mean tile size, zoom levels, scales for each zoom level and so on.

Is there any standard for open GIS? If so, where can I find them or can someone give me links or links?

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Yes, all the services you mention, along with many other open source GIS mappings in the world, have the same standard "z / x / y.png tile standard". Tile numbering, zoom levels, scales, etc. The same for all of these suppliers.

The "Standard" is not official, but OCG formalizes the details under the abbreviation "TMS", unfortunately, in an incompatible way with that in practice (different origin for tile numbering. Gah!)

The OpenStreetMap wiki has a better description of the numbering scheme . You can display such fragments in OpenLayers using the XYZ or OSM levels . Note that the projection for all of these layers is the Spherical Mercator, as well as EPSG: 900913 or EPSG: 3857.

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