Book Image

Learning Geospatial Analysis with Python

By : Joel Lawhead
Book Image

Learning Geospatial Analysis with Python

By: Joel Lawhead

Overview of this book

Geospatial Analysis is used in almost every field you can think of from medicine, to defense, to farming. This book will guide you gently into this exciting and complex field. It walks you through the building blocks of geospatial analysis and how to apply them to influence decision making using the latest Python software. Learning Geospatial Analysis with Python, 2nd Edition uses the expressive and powerful Python 3 programming language to guide you through geographic information systems, remote sensing, topography, and more, while providing a framework for you to approach geospatial analysis effectively, but on your own terms. We start by giving you a little background on the field, and a survey of the techniques and technology used. We then split the field into its component specialty areas: GIS, remote sensing, elevation data, advanced modeling, and real-time data. This book will teach you everything you need to know about, Geospatial Analysis from using a particular software package or API to using generic algorithms that can be applied. This book focuses on pure Python whenever possible to minimize compiling platform-dependent binaries, so that you don’t become bogged down in just getting ready to do analysis. This book will round out your technical library through handy recipes that will give you a good understanding of a field that supplements many a modern day human endeavors.
Table of Contents (17 chapters)
Learning Geospatial Analysis with Python Second Edition
About the Author
About the Reviewers

NextBus vehicle locations

So, the Mainline route ID stored in the tag attribute is simply 1 according to these results. Now, we have all the information that we need to track buses along the LA Metro route 2.

There is only one more required parameter called t, that is, milliseconds since the 1970 Epoch date (January 1, 1970, at midnight UTC). The epoch date is simply a computer standard used by machines to track time. The easiest thing to do in the NextBus API is to specify 0 for this value that returns data for the last 15 minutes.

There is an optional direction tag that allows you to specify a terminating bus stop in case a route has multiple buses running the route in opposite directions. If we don't specify this, the API will return the first one, which suits our needs. The REST URL to get the Mainline route for the LA Metro looks as follows:

Calling this REST URL in a browser returns...