Use GSW change intensity data to extract metrics for each city in GloUrb's sample1
The gsw package gathers functions used to extract metrics from GSW change intensity data.
- gsw_extract_pixels() extracts 1000 pixels of GSW change intensity per zone x reach polygon for a city
- gsw_summarise() summarises results from the 1000 pixels randomly extracted for each zone x reach of a particular city
In data-raw/gsw_collect.qmd we show how these functions can be used iteratively to collect these metrics for the 300 cities of GloUrb's sample1.
In that same document, we show how results for each city are appended to tables in the glourb database :
- gsw_pixels (resulting from gsw_extract_pixels())
- gsw_summary (resulting from gsw_summarise()) .
The functions to display the results (in glourbapp mainly) are:
- gsw_summary() which returns a table
- gsw_summary_plot() which returns a plot