deafrica_tools.app.crophealth

This file contains functions for loading and interacting with data in the crop health notebook, inside the Real_world_examples folder.

Available functions:

load_crophealth_data run_crophelath_app

Last modified: October 2021

Functions

load_crophealth_data(lat, lon, buffer, date)

Loads Sentinel-2 analysis-ready data (ARD) product for the crop health case-study area over the last two years.

run_crophealth_app(ds, lat, lon, buffer)

Plots an interactive map of the crop health case-study area and allows the user to draw polygons.

deafrica_tools.app.crophealth.load_crophealth_data(lat, lon, buffer, date)

Loads Sentinel-2 analysis-ready data (ARD) product for the crop health case-study area over the last two years. Last modified: April 2020

Parameters
  • lat (float) – The central latitude to analyse

  • lon (float) – The central longitude to analyse

  • buffer – The number of square degrees to load around the central latitude and longitude. For reasonable loading times, set this as 0.1 or lower.

  • date – The most recent date to show data for. The app will automatically load all data available for the two years prior to this date.

Returns

ds – data set containing combined, masked data Masked values are set to ‘nan’

Return type

xarray.Dataset

deafrica_tools.app.crophealth.run_crophealth_app(ds, lat, lon, buffer)

Plots an interactive map of the crop health case-study area and allows the user to draw polygons. This returns a plot of the average NDVI value in the polygon area. Last modified: January 2020

Parameters
  • ds (xarray.Dataset) – data set containing combined, masked data Masked values are set to ‘nan’

  • lat (float) – The central latitude corresponding to the area of loaded ds

  • lon (float) – The central longitude corresponding to the area of loaded ds

  • buffer – The number of square degrees to load around the central latitude and longitude. For reasonable loading times, set this as 0.1 or lower.