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@@ -9,7 +9,8 @@ Pull requests that add additional references, ideas, or explorations to the list
 From a photograph containing topographic features, can the location and view angle be determined?
 * Topographic features could be traced from the image manually.
 * An approximate geographic bounding box could be required to constrain the search space.
-* Could make use of OSM data - triangulation/other techniques used on source image to describe a cluster of OSM features and their positions (e.g. bridge, building, way) which are then searched for in a given region. Descriptions would need to be semantic (e.g. relative placement of features, shape of roads) as that is more meaningful than assumed position.
+* Could make use of OSM data - triangulation/other techniques used on source image to describe a cluster of OSM features and their positions (e.g. bridge, building, way) which are then searched for in a given region. Descriptions would need to be semantic (e.g. relative placement of features, shape of roads) as that is more meaningful than assumed position. (For example it could be as simple as searching for 'large apartment block, gas station and river within 50m of each other', or as complex as 'railway line passing through forest with two buildings either side')
+
 
 ### Electrical network frequency analysis