Update SOP.md

docs/SOP.md

@@ -6,5 +6,16 @@ Prerequisites:
 2. Access to the resource group `510Global-ADA` with role `Contributor` or higher
 3. [QGIS](https://www.qgis.org/en/site/index.html) installed locally
 
-### 1. Access and configure the Virtual Machine
-TBI
+### 1. Should I run ADA?
+* There must have been a clear request by the IFRC SIMS/IM Coordinator - in case of international respone - or by its NS counterpart, because we want this analysis to be useful and used.
+* The relevant agencies - [Copernicus](https://emergency.copernicus.eu/mapping/list-of-activations-rapid), [UNOSAT](https://unosat.org/products/), or [others](https://data.humdata.org/search?q=damage+assessment) - must not be already producing damage assessments for this emergency, or there must be a clear gap in terms of spatial coverage of those assessments, because we don't want to duplicate efforts.
+* ...
+
+### 2. Can I run ADA?
+* High-resolution (<0.6 m/pixel) optical satellite imagery of the affected area, both pre- and post-disaster, must be available.
+* The pre- and post-disaster imagery must spatially overlap, since ADA needs both images for each building.
+* There should be building information (polygons) already available by [OpenStreetMap](https://www.openstreetmap.org/), [Microsoft](https://github.com/microsoft/GlobalMLBuildingFootprints/blob/main/examples/example_building_footprints.ipynb), or [Google](https://sites.research.google/open-buildings/#download). 
+  * if not, buildings can be detected automatically using [ABD](https://github.com/rodekruis/ada-collection/tree/master/abd_model), but the quality of the results will strongly depends on building density, being lower for densely built-up areas.
+
+### 3. How do I run ADA?
+1. ...