Modis
MODIS MCD43A4.006
About MODIS Data
MODIS (Moderate Resolution Imaging Spectroradiometer) is a sensor aboard two satellites, Aqua and Terra. It images the earth in 36 different bands at 3 different resolutions (250 m for bands 1-2, 500 meter for bands 3-7 and 1 km for bands 8-36). More information on MODIS sensor is available on the NASA website. MODIS data comes in different products. The MCD43A4 V006 is a product used by Sentinel Hub, with daily global coverage, offering bands 1-7 in 500 meter resolution.
The MCD43A4 V006 is a Version 6 Nadir Bidirectional Reflectance Distribution Function (BRDF) - Adjusted Reflectance (NBAR) dataset. As an NBAR product, it provides estimate of the surface spectral reflectance as it would be measured at ground level in absence of atmospheric scattering and absorbtion. Each pixel contains the best possible information available in a 16 day period as selected on the basis of high observation coverage, low view angle, the absence of clouds or cloud shadow, and aerosol loading.
Read here to learn more about MODIS V006, and to read about MCD43A4 product, visit here and here. For more on surface reflectance in MODIS, visit this NASA website. To see the list of all the available MODIS products (not supported by SH), visit this website.
Basic Facts in Sentinel Hub
The following information holds for the MODIS MCD43A4.006 data product in Sentinel Hub, and not for MODIS in general.
Property | Info |
---|---|
Spatial resolution | 500 m |
Sensor | MODIS - Moderate Resolution Imaging Spectroradiometer |
Units | Reflectance and DN |
Revisit time | Daily |
Spatial coverage | Global |
Data availability | Since February 24, 2000 |
Measurment | Surface reflectance |
Common usage/purpose | Monitoring of large scale land, ocean and atmosphere changes, such as vegetation monitoring or flood, hurricane and wildfire detection. |
Accessing MODIS 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 datasource you are querying. This chapter will help you understand the parameters for MODIS data. For an overview of all API parameters see the API Reference.
Endpoint Locations
Service | Notes |
---|---|
services-uswest2.sentinel-hub.com/api/ | Global since February 24, 2000 |
Data Type Identifier: MODIS
Use MODIS
as the value of the input.data.type
parameter in your API requests.
This is mandatory and will ensure you to get MODIS data.
Filtering Options
This chapter will explain the input.data.dataFilter
object of the MODIS
process
API.
mosaickingOrder
Sets the order of overlapping tiles from which the output result is mosaicked. The tiling is based on ESA's Product Dissemination Units for easier distribution.
Value | Description | Notes |
---|---|---|
mostRecent | the pixel will be selected from the most recently acquired tile | If there are multiple products with the same timestamp then NTC will be used over NRT. |
leastRecent | the pixel will be selected from the oldest acquired tile | If there are multiple products with the same timestamp then NTC will be used over NRT. |
Note that cloud coverage filtering, including leastCC
mosaicking order, is not available for MODIS.
Processing Options
This chapter will explain the input.data.processing
object of the MODIS
process
API.
Action | Description | Values | Default |
---|---|---|---|
upsampling | Defines the interpolation used for processing when the pixel resolution is greater than the source resolution (e.g. 100m/px with a 500m/px source). | NEAREST - nearest neighbour interpolation BILINEAR - bilinear interpolation BICUBIC - bicubic interpolation | NEAREST |
downsampling | Defines the interpolation used for processing when the pixel resolution is lower than the source resolution (e.g. 800m/px with a 500m/px source). | NEAREST - nearest neighbour interpolation BILINEAR - bilinear interpolation BICUBIC - bicubic interpolation | NEAREST |
Available Bands and Data
This chapter will explain the bands and data which can be set in the evalscript input object.
Any string listed in the column Name can be an element of the input.bands
array in your evalscript.
Property Name | Description | Resolution |
---|---|---|
B01 | Red (620 - 670 nm) | 500 m |
B02 | NIR (841 - 876 nm) | 500 m |
B03 | Blue (459 - 479 nm) | 500 m |
B04 | Green (545 - 565 nm) | 500 m |
B05 | N/A (1230 - 1250 nm) | 500 m |
B06 | SWIR16 (1628 - 1652 nm) | 500 m |
B07 | SWIR22 (2105 - 2155 nm) | 500 m |
dataMask | The mask of data/no data pixels (more). | N/A* |
*dataMask has no source resolution as it is calculated for each output pixel.
Units
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.
For MODIS data, the relation between both units is: DN = 10000 * REFLECTANCE
. The default unit is REFLECTANCE
.
Band | Unit | Source Format | Typical Range | Notes |
---|---|---|---|---|
Optical bands B01 - B07 | DN | UINT16 | 0 - 4000 | Higher values in infrared bands. Highly reflective pixels, such as clouds, can have values higher than 10000. |
Optical bands B01 - B07 | REFLECTANCE (default) | UINT16 | 0 - 0.4 | Higher values in infrared bands. Highly reflective pixels, such as clouds, can have reflectance values above 1. |
dataMask | N/A | Boolean | 0 - no data 1 - data |
Catalog API Capabilities
To access Modis MCD43AA.006 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
Service | Notes |
---|---|
services-uswest2.sentinel-hub.com/api/v1/catalog/collections/modis |
Collection identifier:
modis
Distinct extension
date