mirror of
https://github.com/kidwellj/uk_census_shapes_clipped.git
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50 lines
2.4 KiB
Markdown
50 lines
2.4 KiB
Markdown
# UK Census Polygons - Clipped!
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Choropleth visualisations of data can often end up visually misleading in that they colour in polygons which contain vast tracts of uninhabited land. A more accurate visual communication can be achieved by clipping administrative polygons to data on the presence of buildings, that is, only using choropleth shading for areas which are inhabited.
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It is time consuming to produce this data, so I have done so programatically and uploaded the resulting geopackage files to a public repository for easy re-use for reproducible research.
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The files in this repository are only the code used to produce those files. Separate licenses apply to that data etc.
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Data derived from these computations can be found [on zenodo](https://zenodo.org/deposit/6395804).
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Please note, final clipping doesn't seem to work in R on the current version, so I am finishing these using `difference` in QGIS. Output with versions used is as follows:
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```
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QGIS version: 3.16.15-Hannover
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QGIS code revision: e7fdad6431
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Qt version: 5.14.2
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GDAL version: 3.2.1
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GEOS version: 3.9.1-CAPI-1.14.2
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PROJ version: Rel. 6.3.2, May 1st, 2020
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Processing algorithm…
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Algorithm 'Difference' starting…
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Input parameters:
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{ 'INPUT' : 'infuse_dist_lyr_2011_simplified_100m.gpkg|layername=infuse_dist_lyr_2011_simplified_100m', 'OUTPUT' : 'infuse_dist_lyr_2011_simplified_100m_buildings_simplified.gpkg', 'OVERLAY' : 'infuse_dist_lyr_2011_simplified_100m_buildings_overlay_simplified.gpkg|layername=infuse_dist_lyr_2011_simplified_100m_buildings_overlay_simplified' }
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Execution completed in 262.19 seconds
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Results:
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{'OUTPUT': 'infuse_dist_lyr_2011_simplified_100m_buildings.gpkg'}
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Loading resulting layers
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Algorithm 'Difference' finished
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QGIS version: 3.16.15-Hannover
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QGIS code revision: e7fdad6431
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Qt version: 5.14.2
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GDAL version: 3.2.1
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GEOS version: 3.9.1-CAPI-1.14.2
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PROJ version: Rel. 6.3.2, May 1st, 2020
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Processing algorithm…
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Algorithm 'Difference' starting…
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Input parameters:
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{ 'INPUT' : 'infuse_ctry_2011_simplified_100m.gpkg|layername=infuse_ctry_2011_simplified_100m', 'OUTPUT' : 'infuse_ctry_2011_simplified_100m_buildings_simplified.gpkg', 'OVERLAY' : 'infuse_ctry_2011_simplified_100m_buildings_overlay_simplified.gpkg|layername=infuse_ctry_2011_simplified_100_buildings_overlay_simplified' }
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Execution completed in 1548.94 seconds
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Results:
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{'OUTPUT': 'infuse_ctry_2011_simplified_100m_buildings_simplified.gpkg'}
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Loading resulting layers
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Algorithm 'Difference' finished
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``` |