CIgreen Calculator¶
Block type: PROCESSING
This block takes photos from an optical satellite and calculates Chlorophyll Index Green (CIgreen). It produces georeferenced single band GeoTIFF file with matrix containing CIgreen values. Such files can be manually colorized in QGIS with singleband pseudocolor. It is possible to read CIgreen value for particular pixel with Identify Features tool.
Supported parameters¶
satellite
- the name of the block providing input data. See section Supported data blocks for valid values.
Example parameters using Sentinel-2 Level 2 (BOA) AOI clipped
block as data source:
{
"sentinelhub-s2-aoiclipped:1": {
"time": "2018-05-07T16:47:48+00:00/2018-05-09T16:47:49+00:00",
"limit": 1,
"intersects": {
"type": "Polygon",
"coordinates": [
[
[
18.726196,
53.473489
],
[
18.720531,
53.479312
],
[
18.708215,
53.476043
],
[
18.719931,
53.468431
],
[
18.73332,
53.466183
],
[
18.739586,
53.471854
],
[
18.726196,
53.473489
]
]
]
},
"zoom_level": 14
},
"qzsolutions.cigreen:1": {
"satellite": "Sentinel-2 Level 2 (BOA) AOI clipped"
}
}
Supported data blocks¶
Currently this block supports input from data blocks:
Landsat-8 Level 1 (TOA) AOI clipped¶
To see this block on up42 please click here.
Sample block parameters when using Landsat-8 Level 1 (TOA) AOI clipped data block:
{
"satellite": "Landsat-8 Level 1 (TOA) AOI clipped"
}
Formula used for CIgreen calculation: \(B05 / B03 - 1\)
Pléiades Download¶
To see this block on up42 please click here.
Sample block parameters when using Pléiades Download data block:
{
"satellite": "Pleiades Download"
}
Warning
Please notice that satellite
parameter does not contain ‘é’ character but ‘e’.
Formula used for CIgreen calculation: \(NIR / G - 1\)
Sentinel-2 L1C MSI Full Scenes¶
To see this block on up42 please click here.
Sample block parameters when using Sentinel-2 L1C MSI Full Scenes data block:
{
"satellite": "Sentinel-2 L1C MSI Full Scenes"
}
Formula used for CIgreen calculation: \(B08 / B03 - 1\)
Sentinel-2 Level 2 (BOA) AOI clipped¶
To see this block on up42 please click here.
Sample block parameters when using Sentinel-2 Level 2 (BOA) AOI clipped data block:
{
"satellite": "Sentinel-2 Level 2 (BOA) AOI clipped"
}
Formula used for CIgreen calculation: \(B08 / B03 - 1\)
SPOT 6/7 Download¶
To see this block on up42 please click here.
Sample block parameters when using SPOT 6/7 Download data block:
{
"satellite": "SPOT 6/7 Download"
}
Formula used for CIgreen calculation: \(NIR / G - 1\)
Output format¶
The block produces a feature collection with up42.data_path
property containing a name of the result file.
Contents of data.json file returned by a block configured in the previous example:
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"bbox": [
18.69873046875,
53.46189043285912,
18.74267578125,
53.48804553605621
],
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
18.720703125,
53.46189043285912
],
[
18.69873046875,
53.46189043285912
],
[
18.69873046875,
53.47496999954854
],
[
18.69873046875,
53.48804553605621
],
[
18.720703125,
53.48804553605621
],
[
18.74267578125,
53.48804553605621
],
[
18.74267578125,
53.47496999954854
],
[
18.74267578125,
53.46189043285912
],
[
18.720703125,
53.46189043285912
]
]
]
},
"properties": {
"up42.data_path": "271b2edc-49ba-4f5b-90c8-f3ac5810ca29.tiff",
"acquisitionDate": "2018-05-08T09:50:28"
}
}
]
}
Capabilities¶
Input¶
This block has such input_capabilities
:
"input_capabilities": {
"raster": {
"up42_standard": {
"format": {
"or": [
"SAFE",
"GTiff",
"DIMAP"
]
},
"sensor": {"or": ["Landsat8", "Sentinel2", "SPOT", "Pleiades"]},
"bands": ["red", "nir"]
}
}
}
Warning
Please ensure that input block is listed under Supported data blocks section.
Output¶
This block has such output_capabilities
:
"output_capabilities": {
"raster": {
"up42_standard": {
"format": "GTiff",
"dtype": "float",
"resolution": ">"
},
"custom": {
"bands": [
"cigreen"
]
}
}
}