I just updated QGIS to version 3.2. And noticed that the XYZ Tiles is missing. Are they removing it from QGIS 3, because I couldn't find any information about it? Does anyone know where I can find it or do I have to go back to QGIS 2 to get XYZ Tiles? Here is the screenshot for the current map source screen in QGIS 3.2.
QGIS – Fix XYZ Tiles Missing Issue in QGIS 3.2
qgisxyz-tiles
Related Solutions
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https://tile.opentopomap.org/{z}/{x}/{y}.png
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https://tile.thunderforest.com/landscape/{z}/{x}/{y}.png?apikey=YOUR_API_KEY
At first you need to know, that EPSG:4283 is in degrees. See https://epsg.io/4283. You need to use another projection which uses meters as units. Otherwise you wont be able to buffer your points in meters. An alternative could be https://epsg.io/3112 or https://epsg.io/28355. Do some research to find a projection that fits your needs. (Could not find informations for EPSG:102171 doing a quick search. But if you know this one fits your needs, use it)
Secondly you need to know the difference between Project CRS and Layer CRS (which includes the CRS of tile services)
Project CRS: This is the coordinate system of your map canvas: The projection your map will be displayed in. This works on the fly. The project CRS has nothing to do with the layers CRS. You can use layers in all different projections, but they will all be displayed in the projects CRS.
Layers CRS: This is the coordinate system of your layer: The projection that all operations (like buffering) will be performed in. This is independent of your project CRS.
So you can add a XYZ tile, which is in EPSG:3857, to your project and also add a vector-point-layer, which is in EPSG:28355. The layers themselves will not be reprojected, but beeing displayed in the projects CRS which could for example be EPSG:4326. This happens on-the-fly. They will match in their displayed location.
You can not reproject data of a XYZ tile layer (unless you are the one hosting the service). And there is no need to do so. But you can change the projection that XYZ tile layer is beeing displayed in. This works via the project CRS.
Last and most importantly: Do NEVER USE "set CRS" in layer properties unless you know exactly what you are doing. This does not reproject your data/layer! If you want to reproject a layer, DO USE "export as..." and save it as a new file.
Best Answer
Although it doesn't appear in the "Add Layer" dialog, I can add XYZ tiles from this option in the "Browser" panel:
Right-click to add a new tile server connection, or choose one of the existing ones.
If you don't have a "Browser" panel open, use View... Panels... Browser to get one.