gisR

Introduction to GIS with R / Presentation and use case for the Canton of Zurich

How to set up the project

It is suggested to use RStudio to run this project.

1. First clone the repository as described in the linked manual.

2. Go to scripts/00_setup.R and run it (it installs the needed packages and loads the functions)

Scripts

Run the scripts before knitting the presentation. Some files that are downloaded/calculated within the scripts are used by the quarto.

├── 00_setup.R
├── 01_dlFromSTAC.R
├── 02_getGeodata.R
├── 03_loadSaveRasters.R
├── 04_calculateNDVI.R
├── 05_statistics.R

• 01_dlFromSTAC
  Download Band 2-4 & 8 of the Sentinel-2 scene S2B_MSIL2A_20230613T102609_R108_T32TMT_20230613T173356

• 02_getGeodata
  Download Layers from a WFS Server

  • Landwirtschaftliche Nutzflächen
  • Bezirke
  • Gemeindegrenzen
  • Kantonsgrenze Kt. ZH

• 03_loadSaveRasters
  Combine 4 Bands to a single 4-band Raster, project it to EPSG:2056 and save to file.

• 04_calculateNDVI
  Load a 4 Band tif file, calculate the NDVI according to:
  $$NDVI = \frac{(NIR - RED)}{(NIR + RED)}$$
  and save it to file.

• 05_statistics
  From the NDVI raster and a polygon layer, calculate the mean NDVI per feature, indicating vegetation health per parcel.