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This tutorial shows how to import a spreadsheet or text file containing coordinates into QGIS and convert those points into a shapefile. It also covers basic coordinate system selection so your points align correctly with other GIS layers.
Coordinates should be in a format that QGIS can interpret, such as:
Decimal degrees are the easiest format for import.
Always set the source CRS before exporting so the shapefile aligns correctly with basemaps and other spatial datasets.
If your file does not contain coordinates, you will need to geocode addresses or convert coordinate formats before importing.
For assistance, consult QGIS documentation on importing delimited text files and the Add Delimited Text Layer tool.