Landsat 7 ETM+ L2

About Landsat 7 ETM+ Collection 2 Level-2 Data

Mission Information

The Landsat 7 Enhanced Thematic Mapper (ETM+) sensor is carried onboard Landsat 7. It provides 7 spectral bands and 1 thermal band. Learn more about here.

Basic Facts

Spatial resolution30 m (the thermal band is re-sampled from 60 m)
SensorEnhanced Thematic Mapper (ETM+) with 7 spectral bands and 1 thermal band
Revisit time16 days
Spatial coverageWhole globe
Data availabilitySince April 1999

Accessing Data

To access data you need to send a POST request to our process API. The requested data will be returned as the response to your request. Each POST request can be tailored to get you exactly the data you require. To do this requires setting various parameters which depend on the collection you are querying. This chapter will help you understand the parameters for Landsat 7 ETM+ Level-2 data. For an overview of all API parameters see the API Reference.

Endpoint Locations

ServiceNotes coverage since April 1999.

Data type identifier: landsat-etm-l2

Use landsat-etm-l2 [1] (previously LETML2) as the value of the parameter in your API requests. This is mandatory and will ensure you get Landsat 7 ETM+ Level-2 data.

The collection is currently in the preview stage and might thus change.

[1]: landsat-etm-l2 stands for Landsat Enhanced Thematic Mapper Level-2.

Filtering Options

This chapter will explain the object of the process API.


Sets the order of overlapping tiles from which the output result is mosaicked. Note that tiles will in most cases come from the same orbit/acquisition. The tiling is done by USGS for easier distribution.

mostRecentselected by default. The pixel will be selected from the tile, which was acquired most recentl
leastRecentsimilar to mostRecent but in reverse order
leastCCpixel is selected from tile with the least cloud coverage metadatanote that "per tile" information is used here, each covering about a 31,000 sq. km area, so this information is only an estimate.


Sets the upper limit for cloud coverage in percent based on the precomputed cloud coverage estimate for each tile as present in the tile metadata. Satellite data will therefore not be retrieved for tiles with a higher cloud coverage estimate. For example, by setting the value to 20, only tiles with at most 20% cloud coverage will be used. Note that this parameter is set per tile and might not be directly applicable to the chosen area of interest.


Selects product tiers.

TIER_1selects Tier 1 products
ALL_TIERSselected by default. selects Tier 1 and Tier 2 products

Processing Options

This chapter will explain the object of the process API.

upsamplingThe same as for S2L1C.
downsamplingThe same as for S2L1C.

Available Bands and Data

Information in this chapter is useful when defining input object in evalscript. Any string listed in the column Name can be an element of the input.bands array in your evalscript.

B01Blue (450-520 nm)30m
B02Green (520-600 nm)30m
B03Red (630-690 nm)30m
B04Near Infrared (NIR) (770-900 nm)30m
B05Shortwave Infrared (SWIR) 1 (1550-1750 nm)30m
B06Thermal Infrared (10400-12500 nm)30m [1]
B07Shortwave Infrared (SWIR) 2 (2090-2350 nm)30m
QA_RADSATRadiometric Saturation and Terrain Occlusion QA Band30m
ST_TRADThermal band converted to radiance30m
ST_URADUpwelled Radiance30m
ST_DRADDownwelled Radiance30m
ST_ATRANAtmospheric Transmittance30m
ST_EMISEmissivity estimated from ASTER GED30m
ST_EMSDEmissivity standard deviation30m
ST_CDISTPixel distance to cloud30m
SR_ATMOS_OPACITYInternal SR Atmospheric Opacity30m
SR_CLOUD_QAInternal SR Atmospheric Opacity30m
ST_QASurface Temperature QA30m
dataMaskThe mask of data/no data pixels (more).N/A [1]

[1]: Thermal band is acquired at 60 meter resolution, but is resampled to 30 meter in delivered data product (source).
[2]: dataMask has no source resolution as it is calculated for each output pixel.


The data values for each band in your custom script are presented in the default units as specified here. In case more than one unit is available for a given band, you may optionally set the value of input.units in your evalscript setup function to one of the options. Doing so will present data in that unit. The Source Format specifies how and with what precision the digital numbers from which the unit is derived are encoded. The Typical Range indicates what values are common for a given band and unit, however outliers can be expected.

BandsUnitSource FormatTypical RangeNotes
Optical bands
B01 - B05, B07
REFLECTANCE [1]UINT160 - 0.4Higher values in infrared bands. Reflectance values can easily be above 1.
Thermal band
KELVIN [2]UINT16250 - 320Brightness temperature of roughly -20 to +50 C. Can reach outside this range in extreme environments.
BQAN/AUINT16bit-packed combination [3]
QA_RADSATN/AUINT16bit-packed combination [3]
ST_EMIS, ST_EMSDEmissivity coefficientINT16
SR_CLOUD_QAKELVINUINT8bit-packed combination (info here)
dataMaskN/ABoolean0 - no data
1 - data

[1]: Surface Reflectance.
[2]: Surface Brightness Temperature. [3]: Info here.

Catalog API Capabilities

To access Landsat product metadata you need to send search request to our Catalog API. The requested metadata will be returned as JSON formatted response to your request.

Endpoint Locations

ServiceNotes availability and coverage is the same as in the basic facts

Collection identifier: landsat-etm-l2

Query extension

  • eo:cloud_cover cloud cover percentage

Distinct extension

  • date