Overview
========

Lesson contents:

1. `Geometric operations: Overlay analysis <../../notebooks/L4/geometric-operations.ipynb>`__
2. `Data classification <../../notebooks/L4/reclassify.ipynb>`__
3. :doc:`Exercise 4 <exercise-4>`

Learning goals
--------------

After this class, you should be able to:

- Create new geometries based on overlay analysis
- Aggregate geometries
- Simplify geometries
- Classify data based on different criteria using common classifiers, and custom classifiers

Sources
-------

Following materials are partly based on documentation of `Geopandas <http://geopandas.org/geocoding.html>`__, `Pandas <http://pandas.pydata.org/>`__, `Shapely
<http://toblerity.org/shapely/manual.html#>`__, and `pysal <http://pysal.readthedocs.io/en/latest/>`_.

Lesson videos
--------------

.. admonition:: Lesson 4 - Overlay analysis

    .. raw:: html

        <iframe width="560" height="315" src="https://www.youtube.com/embed/5EKoqoSKEvg" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        <p>Vuokko Heikinheimo, University of Helsinki <a href="https://www.youtube.com/watch?v=4zSLRpXZAIU&list=PLs9D4XVqc6dClEYe0tk6Ce1YZkppw8dbL">@ AutoGIS channel on Youtube</a>.</p>


    **Contents:**

        - Intro 0:00
        - Downloading input data 06:26
        - Reading in data 09:05
        - Info about the Travel Time Matrix data set 12:02
        - Overlay operation 23:40
        - Aggregating data 31:05
        - Simplifying geometries 47:40

.. admonition:: Lesson 4 - Data reclassification

    .. raw:: html

        <iframe width="560" height="315" src="https://www.youtube.com/embed/mtQbZPyjy5M" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        <p>Vuokko Heikinheimo, University of Helsinki <a href="https://www.youtube.com/watch?v=4zSLRpXZAIU&list=PLs9D4XVqc6dClEYe0tk6Ce1YZkppw8dbL">@ AutoGIS channel on Youtube</a>.</p>


    **Contents:**

        - Data reclassification - intro 0:00
        - Reading input data 07:00
        - Plotting a simple choropleth map with a classification 9:30
        - Pysal mapclassify 13:55
        - Applying a classifier on a DataFrame 18:08
        - Plotting a histogram 27:08
        - Creating a custom classifier 36:08
        - Exercise 4 intro 42:30


.. admonition:: Lesson 4 - Creating a Python GIS environment using conda

    .. raw:: html

        <iframe width="560" height="315" src="https://www.youtube.com/embed/lGKWe9DEy0g" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
        <p>Vuokko Heikinheimo, University of Helsinki <a href="https://www.youtube.com/watch?v=4zSLRpXZAIU&list=PLs9D4XVqc6dClEYe0tk6Ce1YZkppw8dbL">@ AutoGIS channel on Youtube</a>.</p>