Search Sentinel-3 Images

The following code shows how to search S3 Images

Prerequisites

To run this code you need:

  • A running Python 3.x Environment

  • A valid WASDI Account

If this is not clear, you probably need to take a look to the Python Tutorial before.

Recipe

Note

Assume you have at least one workspace and you configured it in the config.json file

These are different samples of Sentinel 2 Search. The mandatory fields to search are:

  • Mission Type

  • Start Date

  • End Date

  • Product Type

  • Bounding Box

# Create the Bounding Box Object: usually you will take if from the parameters
oBBox = wasdi.getParameter("BBOX", None)

# If it is null we show here how to initialize manually
if oBBox is None:
    oBBox = {"northEast": {}, "southWest": {}}
    oBBox["northEast"]["lat"] = 20.1
    oBBox["northEast"]["lng"] = 44.4
    oBBox["southWest"]["lat"] = 19.3
    oBBox["southWest"]["lng"] = 43.2

# Set Start Date getting the parameter from parameters file, fallbacks to 2023-01-01 if value is not specified
sStartDate = wasdi.getParameter("START_DATE", "2023-01-01")
# Set End Date getting the parameter from parameters file, fallbacks to 2023-01-10 if value is not specified
sEndDate = wasdi.getParameter("END_DATE", "2023-01-10")

# Start Search S3 Images using the automatic provider selection
aoProductsFoundArray = wasdi.searchEOImages("S3", sDateFrom=sStartDate, sDateTo=sEndDate, sProvider="AUTO",
                                            oBoundingBox=oBBox)

# The result is an array of Objects. Each Object is a Dictionary.

# Let's see how many products correspond to our query
wasdi.wasdiLog(f'Your query identified {len(aoProductsFoundArray)} products')

# If we have results
if len(aoProductsFoundArray) > 0:
    # as an example, let's print the filename of the first product we found
    wasdi.wasdiLog(f'{aoProductsFoundArray[0]["fileName"]}')

What it does:

  • Initializes the input variable needed.

  • Start searching for Sentinel-3 Images - automatically selecting the provider

  • Loops over the results and prints the file names of the files reporting Land Surface Temperature (reference data)

Note

The developer can decide whatever is needed in the params.json file. If you decide to use the WASDI User Interface your parameters will be generated automatically by WASDI.

Note

With the WASDI User Interface you can use the renderAsStrings flag to ask WASDI to get all your parameters in String Format. In this case you will be responsible for converting your data in your code.

Note

The Bounding Box Format used here is the one used by the User Interface when renderAsStrings is missing or false. The Bounding Box format when renderAsStrings: true is “NORTH,WEST,SOUTH,EAST”.

Note

The Date is formatted by the User Interface as “YYYY-MM-DD”.