Book Image

Geospatial Development By Example with Python

By : Pablo Carreira
5 (1)
Book Image

Geospatial Development By Example with Python

5 (1)
By: Pablo Carreira

Overview of this book

From Python programming good practices to the advanced use of analysis packages, this book teaches you how to write applications that will perform complex geoprocessing tasks that can be replicated and reused. Much more than simple scripts, you will write functions to import data, create Python classes that represent your features, and learn how to combine and filter them. With pluggable mechanisms, you will learn how to visualize data and the results of analysis in beautiful maps that can be batch-generated and embedded into documents or web pages. Finally, you will learn how to consume and process an enormous amount of data very efficiently by using advanced tools and modern computers’ parallel processing capabilities.
Table of Contents (17 chapters)
Geospatial Development By Example with Python
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Building an image processing pipeline


Image processing, be it for geographic applications or not, generally requires the execution of a sequence of transformations (that is, steps) in order to obtain the desired final result. In these sequences, the output of one step is the input of the next one. In computing, this is called processing pipeline.

This type of data manipulation is very versatile, because you have a range of functions or steps than can be arranged into numerous combinations to produce a wide range of results.

What we did so far, in this chapter's examples, was we opened an image from the disk, performed a given operation, and saved the results to another image on the disk. Then, in the next step, we opened the result from the previous one and so on.

Despite the steps are not yet connected, we can imagine the following image processing pipeline:

Saving intermediary steps to the disk is useful when we want to use the images from them, or in other situations, when the pipeline uses...