GEOG 379 Lecture Notes - Lecture 8: Arcgis, Geocoding, Cookie Dough
22 Mar 2018
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Document Summary
Single layer processing: processing based on single layer only, dissolve, summarize, producing just table not map, ex summarizing the data of how many voters in a voting district. Multiple layer analysis (overlays: extracts spatial data from one layer by using spatial data from another layer, clip, combines spatial data from 2+ layers based on their spatial relationships. Clipping procedures: define input features (cookie dough, define clip features (cookie cutter, name + store new feature dataset. Clip vs select by location: clip, clean edges, looks good, select by location, dangling edges, better for geocoding. Intersect: spatial extent of output data is limited to area of overlap multiple input layers possible, features in output dataset have the attribute data of all input data sets. Union: works exactly like intersect except that all features of all input datasets are included (not just the overlapping areas, features in the output dataset have the attribute data of all input data sets.
