Adding fuller readme.

download/README.md

@@ -1,4 +1,37 @@
 # imagelist.py
 
 
+This script downloads a list of images provided by a txt file from the example Getty images stored in Google Drive. 
 
+To run the command you first need to download credentials from Google by registering a new Google Drive project at:
+
+https://developers.google.com/workspace/guides/create-project
+
+Download the credentials and store it in the download directory and call it `credentials.json`. 
+
+Run the command as follows:
+
+```
+python imagelist.py ../data/50_images/image_list.txt ../imgs/50/original/
+```
+
+Where:
+ * `../data/50_images/image_list.txt` is the list of image filenames to download
+ * `../imgs/50/original/`` is the location to download the tif files.
+
+
+An example of the image list is below:
+
+```
+gm_36716601.tif
+gm_36717601.tif
+gm_36717701.tif
+gm_36717901.tif
+gm_37049301.tif
+gm_37199501.tif
+gri_2001_pr_2_001_mm.tif
+gri_2003_r_22_b008_007_mm.tif
+gri_2011_m_34_001_pm.tif
+gri_2012_pr_71_pm.tif
+gri_2014_pr_24_001_mm.tif
+```