JavaScript and GEE Quizz

Which satellite is used in the script to compute NDVI over Bengaluru?

• Sentinel-2

• MODIS

• Landsat 8

• ERA5

In NDVI calculation, which bands are used?

• B3 and B4

• B5 and B4

• B2 and B3

• B4 and B6

What does .buffer() do in GEE?

• Clips the image

• Zooms to the region

• Applies classification

• Expands the geometry by a specified distance

Which GEE function is used to filter multiple countries by name?

• ee.Filter.eq()

• ee.Filter.inList()

• ee.Filter.or()

• ee.Filter.notEquals()

Which image collection provides NO₂ data from Sentinel-5P?

• LANDSAT/LC08/C02/T1_TOA

• ECMWF/ERA5_LAND/MONTHLY_AGGR

• COPERNICUS/S5P/OFFL/L3_NO2

• MODIS/006/MOD13Q1

The purpose of the maskS2clouds() function is:

• To enhance image contrast

• To mask clouds in Sentinel-2 imagery

• To correct atmospheric effects

• To merge multiple images

What does the function do?

• Clip geometry

• Visualize land cover

• Mask cloud and cirrus pixels

• Filter image collection

What type of chart is generated by ui.Chart.image.seriesByRegion()?

• Scatter plot

• Pie chart

• Line chart of time series

• Box plot

What bands are used for Sentinel-2 false color composite (FCC)?

• B4, B3, B2

• B5, B4, B3

• B8, B4, B3

• B11, B8, B4

In land cover classification using Random Forest, what does sampleRegions() do?

• Clips data by region

• Trains the classifier

• Extracts pixel values for training

• Masks clouds