Arc topology example diagrams

_sources/features/topo-arc/examples.yaml

@@ -1,9 +1,11 @@
-- title: Example GeoJSON feature using Arc with Center topology
+- title: Example GeoJSON feature using ArcWithCenter topology
   content: |-
     Arc with Center example.
 
     Topology defined by 2 end points and a centre that are references to features with point geometry.
 
+    ![Example](assets/arc-with-center.png)
+    
     radius and arcLength are implicit but may be provided as optional properties of the feature.
 
 
@@ -21,7 +23,7 @@
 
       Note that properties "radius" and "arcLength" are not required in the containing feature but defined for convenience.
 
-      ![Example](@@assets@@/arc.png)
+      ![Example](assets/arc.png)
 
   snippets:
     - language: json
@@ -31,10 +33,12 @@
       shacl-closure:
         - ../topo-feature/examples/points.ttl
 
-- title: Example GeoJSON feature using Arc by chord topology
+- title: Example GeoJSON feature using ArcByChord topology
   content: |-
       Arc by Chord example.
 
+      ![Example](assets/arc-by-chord.png)
+
   snippets:
     - language: json
       base-uri: http://www.example.com/features/
@@ -43,10 +47,12 @@
       shacl-closure:
         - ../topo-feature/examples/points.ttl
 
-- title: Example GeoJSON feature using  Circle with Center topology
+- title: Example GeoJSON feature using  CircleWithCenter topology
   content: |-
       Circle with Center example.
-
+    
+      ![Example](assets/circle-with-center.png)
+-
   snippets:
     - language: json
       base-uri: http://www.example.com/features/
@@ -59,6 +65,8 @@
   content: |-
     Cubic Spline example.
 
+    ![Example](assets/spline.png)
+-
   snippets:
     - language: json
       base-uri: http://www.example.com/features/

_sources/features/topo-arc/examples/arc_by_center.json

@@ -11,7 +11,7 @@
       "P2",
       "PC"
     ],
-    "orientation": "cw"
+    "orientation": "ccw"
   },
   "properties": {
     "arcLength": 25.615,

_sources/features/topo-arc/tests/arc_chord-orientation-fail.json

@@ -8,12 +8,12 @@
   "geometry": null,
   "topology": {
     "type": "ArcByChord",
-    "x-description": "References is an ordered list of features with for an Arc Chord, radius and length determine geometry",
+    "x-description": "orientation does not match keyword.",
     "references": [
       "P1",
       "P2"
     ],
-    "orientation": "cw",
+    "orientation": "+",
     "radius": 2.5
   },
   "properties": {

_sources/features/topo-feature/examples/points.ttl

@@ -13,7 +13,7 @@
 
 <http://www.example.com/features/P3> a geojson:Feature ;
     geojson:geometry [ a geojson:Point ;
-            geojson:coordinates ( 16 16 ) ] .
+            geojson:coordinates ( 13 17 ) ] .
 
 
 <http://www.example.com/features/PC> a geojson:Feature ;
@@ -22,11 +22,11 @@
 
 <http://www.example.com/features/Px1> a geojson:Feature ;
     geojson:geometry [ a geojson:Point ;
-            geojson:coordinates ( 12 12 ) ] .
+            geojson:coordinates ( 14 12.5 ) ] .
 
 <http://www.example.com/features/Px2> a geojson:Feature ;
     geojson:geometry [ a geojson:Point ;
-            geojson:coordinates ( 13 15 ) ] .
+            geojson:coordinates ( 12.5 15 ) ] .
 
 <http://www.example.com/features/PVS> a geojson:Feature ;
     geojson:geometry [ a geojson:Point ;