Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Learning Geospatial Analysis with Python-Second Edition
  • Table Of Contents Toc
  • Feedback & Rating feedback
Learning Geospatial Analysis with Python-Second Edition

Learning Geospatial Analysis with Python-Second Edition

By : Joel Lawhead
3.8 (4)
close
close
Learning Geospatial Analysis with Python-Second Edition

Learning Geospatial Analysis with Python-Second Edition

3.8 (4)
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 (12 chapters)
close
close
11
Index

Geolocating photos


Photos taken with GPS-enabled cameras including smartphones store location information in the header of the file in a format called exchangeable image file format (EXIF) tags. These tags are based largely on the same header tags used by the TIFF image standard. In this example, we'll use those tags to create a shapefile with point locations for the photos and file paths to the photos as attributes.

We'll use the Python Imaging Library in this example because it has the ability to extract EXIF data. Most photos taken with smartphones are geotagged images; however, you can download the set used in this example from the following URL:

http://git.io/vczR0

First, we'll import the libraries we need including PIL for the image metadata and PyShp for the shapefiles:

import glob
import os
try:
    import Image
    import ImageDraw
except:
    from PIL import Image
    from PIL.ExifTags import TAGS
import shapefile

Now, we'll need three functions. The first extracts the EXIF data...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Edit Note

Modal Close icon
Write a note (max 255 characters)
Cancel
Update Note

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY