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docs/cwl-workflow/scatter-cloud-native.md

@@ -1,4 +1,38 @@
-CWL can run sub-workflows in a step. Below a CWL Workflow created to process a list of STAC Items and then generate a STAC catalog with several detected water bodies.
+CWL can run sub-workflows in a step. 
+
+To process a list of STAC Items and then generate a STAC catalog with several detected water bodies, the flowchart is:
+
+``` mermaid
+graph TB
+A["[STAC Item URL, STAC Item URL]"]
+A --> F
+A --> B(("crop(green)"));
+A--> C(("crop(nir)"));
+subgraph scatter on STAC Items
+P[bands]
+Q[EPSG code]
+R[AOI]
+subgraph scatter on bands
+  P --> B(("crop(green)"))
+  P --> C(("crop(nir)"))
+  Q --> B(("crop(green)"))
+  Q --> C(("crop(nir)"))
+  R --> B(("crop(green)"))
+  R --> C(("crop(nir)"))
+end
+B(("crop(green)")) --> D
+C(("crop(nir)")) --> D
+D(("`Normalized 
+difference`"));
+D --> E(("`Otsu
+ threshold`"))
+end
+E --> F
+F(("`Create 
+STAC Catalog`"))
+```
+
+Below a CWL Workflow implementing this scenario:
 
 ```yaml linenums="1" hl_lines="18-21 33-43"
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