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Python Geospatial Analysis Cookbook

Python Geospatial Analysis Cookbook

By : Diener
4.4 (5)
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Python Geospatial Analysis Cookbook

Python Geospatial Analysis Cookbook

4.4 (5)
By: Diener

Overview of this book

Geospatial development links your data to places on the Earth’s surface. Its analysis is used in almost every industry to answer location type questions. Combined with the power of the Python programming language, which is becoming the de facto spatial scripting choice for developers and analysts worldwide, this technology will help you to solve real-world spatial problems. This book begins by tackling the installation of the necessary software dependencies and libraries needed to perform spatial analysis with Python. From there, the next logical step is to prepare our data for analysis; we will do this by building up our tool box to deal with data preparation, transformations, and projections. Now that our data is ready for analysis, we will tackle the most common analysis methods for vector and raster data. To check or validate our results, we will explore how to use topology checks to ensure top-quality results. This is followed with network routing analysis focused on constructing indoor routes within buildings, over different levels. Finally, we put several recipes together in a GeoDjango web application that demonstrates a working indoor routing spatial analysis application. The round trip will provide you all the pieces you need to accomplish your own spatial analysis application to suit your requirements.
Table of Contents (15 chapters)
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12
A. Other Geospatial Python Libraries
13
B. Mapping Icon Libraries
14
Index

Generating a leaflet web map with Folium


Creating a web map with your own data is becoming easier with every new web mapping library. Folium (http://folium.readthedocs.org/) is a small new Python project that can create a simple web map directly from your Python code, leveraging the leaflet JavaScript mapping library. This is still more than one line, but with under 20 lines of Python code, you can have Folium generate a nice web map for you.

Getting ready

Folium requires the Jinja2 template engine alongside Pandas for data binding. The nice part about this is that both are simple to install using pip:

pip install jinja2
pip install pandas

Instructions on using Pandas are also found in Chapter 1, Setting Up Your Geospatial Python Environment.

How to do it...

  1. Now make sure that you are in your /ch10/code/ folder to see the live example of Folium as follows:

    #!/usr/bin/env python
    # -*- coding: utf-8 -*-
    import folium
    import pandas as pd
    
    # define the polygons
    states_geojson = r'us-states.json'...

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