Digital Data and Basic Table Operations

Digital data and basic table operations introduced digital data downloads with a few examples, basic selection by locations, and basic table operations. Most GIS store attribute data in tables. Each feature in a data layers is associated with a row in a table. I could select data manually from the geographic features or via the tables. I could also add or remove table columns and calculate values into columns.


1) a Kodiak Island map using online and downloaded data





2) a population density map from a census data set, with subset cities from a US data set





3) a proportional symbol map of county population for the lower 48 U.S. states




4) a shaded relief/hydrography map






5) a map of wetlands by size class



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