STAC trial runs cataloging tifs (geotagged imagery)

Process

• Download the raw data from the government
• Unzip the raw data from a zipped file and decompose into .tif files
• Turn the .tif into cloud optimised geotagged image files (cog.tif)
• Coordinate transformation from HK1980 to WGS84
• Create a thumbnail imageries collection for those cog images (for quicklook usage)
• Upload the cog tif and thumbnail data into the server
• Create a STAC item for each of the tif data
• Inside the item, define the asset with cog, thumbnail, quicklook and herf (link to the cog imagery)
• Create a STAC collection contains all the STAC item to build a collection
• Create a STAC catalog to host the collection and associated items
• Regular maintain the STAC item for future updates Data was collected from the CSDI Portal.