Differentiate between primary and secondary sources of geographic data with suitable examples

primary data and secondary data - and each science independently defines how different kinds of data fits into each category.  Within GIS, primary data is any data digitized within the software or collected by hand using a GPS receiver, as we examined in Chapter Six.  Secondary data is any data which is output from a geoprocessing tool or data that has been ______ _______ _________ ____ _____ _______.
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