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MODIS (GeoTIFF)

MODIS optical data with daily revisit rate fetched using Global Imagery Browse Services (GIBS).


Introduction

This block provides MODIS true-color images at processing level 2. These images are acquired by the Terra satellite sensor at a revisit rate of 1-2 days anywhere on the globe. Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning. The datasets are available starting with 2000.

Technical information

Compatible blocks

Compatible blocks
Export Data (Raster)
K-means Clustering
Raster CRS Conversion

Geographic coverage

The geographic coverage is global.

Dataset information

SpecificationsDescription
Data providerNASA Global Imagery Browse Services
Spatial resolution (m)250
Image typeOptical
Spectral bandsRed - Band 1
Green - Band 4
Blue - Band 3
Acquisition modeMono
Geometric processing levelOrtho
Radiometric processing levelL2 (Corrected reflectance)
Revisit frequencyDaily
Data availabilitySince 2000
File formatGeoTIFF
Bit depth8 bits per pixel
16 bits per pixel
Coordinate systemWGS84/Pseudo-Mercator (EPSG 3857)
Can be reused in an UP42 workflowNo

Limitations

Data cannot be queried based on scene ID.

Good to know

This data block also provides MODIS-derived data such as the Normalized Difference Vegetation Index (NDVI) (rolling 8-day average) product or the Corrected Reflectance for Bands 7-2-1.

Good to know

This is an open source block and it is intended to help you build your own custom data block from scratch. For more information, please check the source code in the modis repository.

Available Layers

The default layer is MODIS_Terra_CorrectedReflectance_TrueColor. The full list of available layers can be found in the modis repository. These layers originate from the GIBS Available Imagery Products and they have the same extent and resolution as the MODIS true-color layer.

The generated GeoTIFF image file includes all the layers defined in the job parameters. These layers are added as individual bands in the order specified in the job parameters. Tags are also written into the output file with the origin of each band (see example metadata for a raster rendered in QGIS).

Layer Information in the Metadata
Layer Information in the Metadata

Layer identifierDescription
MODIS_Aqua_CorrectedReflectance_TrueColorAqua is the second MODIS satellite with an afternoon crossing time.
MODIS_Terra_NDVI_8DayA rolling 8-day NDVI average computed with MODIS Terra imagery.
MODIS_Terra_EVI_8DayA rolling 8-day EVI average computed with MODIS Terra imagery.
MODIS_Terra_CorrectedReflectance_Bands367Bands 3,6 and 7 are useful for determining Land/Cloud/Aerosols properties.
MODIS_Terra_CorrectedReflectance_Bands721Bands 7,2 and 1 are useful for determining Land/Cloud/Aerosols boundaries.

When rendering a 4-band raster with uint8 as data type into a GIS software like QGIS, band 4 is set as the alpha band (transparency band) by default. You can turn the alpha band off by going to Layer Properties and setting the transparency band to None in the tab Transparency.

How it works

Supported JSON parametersDefault valueMinMaxExamples
time"2018-01-01T00:00:00+00:00/2021-12-31T23:59:59+00:00"01.01.2000present"time": "2016-11-01T00:00:00+00:00/2016-11-30T23:59:59+00:00"
limit11n.a."limit": 80
zoom_level999"zoom_level": 9
imagery_layers"MODIS_Terra_CorrectedReflectance_TrueColor"n.a.n.a."imagery_layers": ["MODIS_Terra_NDVI_8Day"]
bbox/contains/intersectsnulln.a.n.a.Please check the examples from the JSON parameters.

Examples

Example based on a workflow created with the data block MODIS (GeoTIFF):

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Capabilities

Output

To know more please check the block capabilities specifications.

For more information, please refer to the marketplace.