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Mastering Geospatial Analysis with Python
book

Mastering Geospatial Analysis with Python

by Silas Toms, Paul Crickard, Eric van Rees
April 2018
Beginner to intermediate content levelBeginner to intermediate
440 pages
11h 36m
English
Packt Publishing
Content preview from Mastering Geospatial Analysis with Python

Basic geometric operations

Here are some basic geometric operations we can perform on our polygon. We create the area, centroid, boundary, convex hull, buffer, and check if a polygon contains a certain point:

# 1 create areaIn: print("The area of our polygon is %d" % polygon.Area())Out: The area of our polygon is 16# 2 calculate centroid of polygonIn: cen = polygon.Centroid()print(cen)Out: POINT (3 3)# 3 Get the boundaryIn: b = polygon.GetBoundary()print(b)Out: LINESTRING (1 1,5 1,5 5,1 5,1 1)# 4 convex hull does the same in this case as boundary, as our polygon is a square:In: ch = polygon.ConvexHull() print(ch)Out: POLYGON ((1 1,1 5,5 5,5 1,1 1))# 5 buffer. A buffer value of 0 (zero) returns the same values as boundary and convex hull in ...
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Publisher Resources

ISBN: 9781788293334Supplemental Content