October 2013
Beginner to intermediate
364 pages
8h 8m
English
Content preview from Learning Geospatial Analysis with PythonBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Common vector GIS concepts
This section will discuss different types of GIS processes commonly used in geospatial analysis. This list is not exhaustive; however, it provides the essential operations on which all other operations are based. If you understand these operations you can quickly understand much more complex processes as they are either derivatives or combinations of these processes.
Data structures
GIS vector data uses coordinates consisting of, at a minimum, an x horizontal value and a y vertical value to represent a location on the earth. In many cases a point may also contain a z value. Other ancillary values are possible including measurements or timestamps.
These coordinates are used to form points, lines, and polygons to model real-world ...
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