census-mapping's Introduction

Interactive Mapping in Python with UK Census Data

This is the code for my Medium article on this subject.

Files

The files in the order they are discussed are:

census_read_data.py - read Census Index, Table and Data, also Geography lookup

census_read_geopandas.py - read local Shapefile for Wards and LADs

census_geopandas_script.py - plot map using GeoPandas and Matplotlib

census_read_geojson.py - read cached GeoJSON for Wards and LADs

census_plotly_script.py - plot map using GeoJSON and Plotly

census_plotly_script_better.py - plot map using GeoJSON and Plotly, improved layout

census_dash_script_simple.py - simple interactive map using GeoJSON and Plotly Dash

census_dash_script_full.py - full interactive map using GeoJSON and Plotly Dash

Python Packages

I used Python 3.9 on Windows 11 and normally use pip to install packages. However, geopandas depends on packages that are implemented in C/C++, so special procedures are required to install it on Windows. (Apparently the install is straightforward on Linux and Mac.)

These are the steps I followed:

    pip install wheel
    pip install pipwin
    pipwin install numpy
    pipwin install pandas
    pipwin install gdal
    # Add the new GDAL path to the Windows PATH environment variable, e.g.:
    # C:\Users\<username>\AppData\Local\Programs\Python\Python39\Lib\site-packages\osgeo
    # It seems this must be done before installing Fiona.
    pipwin install fiona
    pipwin install pyproj
    pipwin install rtree
    pipwin install shapely
    pipwin install six
    pip install geopandas

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