Chapter 7. Working with real data


This chapter covers
  • Tools for importing/exporting spatial data
  • Importing data from various file types


In the prior chapters we explored many of the functions provided in PostGIS by creating our own test data and also discussed spatial reference system considerations for data. In this chapter we’ll cover how to load real data and export it. You can find free geographic data to load in your database in numerous locations. Geographic data that covers large areas on a spheroidal earth needs a little special care. You’ll need to understand, at least on a rudimentary level, ellipsoids, datums, and projections to be able to understand the pros and cons of each spatial reference system and determine which ones ...

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