Minor fixes following workshop

Author: geographika

workshop/content/docs/advanced/sld.md

@@ -1,5 +1,9 @@
 # Styled Layer Descriptor (SLD) in MapServer
 
+!!! warning
+
+    This page is currently in a draft form.
+
 ## Overview
 
 Styled Layer Descriptor (SLD) is an OGC standard used for describing styles. SLD files are written in XML. 

workshop/content/docs/inputs/vector.md

@@ -55,8 +55,8 @@ CONNECTION "/vsicurl/https://raw.githubusercontent.com/ofrohn/d3-celestial/maste
 ## Exercises
 
 1. Try adding a new dataset to the `stars.map`, for example `mw.json` which is at the same location as the other datasets:
-   
-   ```scala
+
+    ```scala
     LAYER
         TYPE POLYGON
         NAME "milkyway"

workshop/content/docs/outputs/ogcfeatures.md

@@ -121,10 +121,21 @@ new VectorLayer({
 
 1. Modify the `workshop\exercises\mapfiles\railways.map` to enable the OGC Features API. You will need to add a new entry to the `MAPS` section in `workshop\exercises\mapfiles\mapserver.conf` and restart the Docker container to be able to browse the OGC Features API interface. 
 
+    ```scala
+    MAPS
+        ...
+        RAILWAYS "/etc/mapserver/railways.map"
+    END
+    ```
+
+    You also need to add the following to `WEB` `METADATA` so MapServer can correctly construct the URLs: `"oga_onlineresource" "/railways/ogcapi"`
+
     !!! tip
 
-    You need to add `TEMPLATE "void"` to each of the layers you want to make available through the OGC Features API. 
-    [TEMPLATE](https://mapserver.org/mapfile/layer.html#mapfile-layer-template) is a left-over from when HTML templates were used to return features, and allows the layer to be queried. 
+        You need to add `TEMPLATE "void"` to each of the layers you want to make available through the OGC Features API. 
+        [TEMPLATE](https://mapserver.org/mapfile/layer.html#mapfile-layer-template) is a left-over from when HTML templates were used to return features, and allows the layer to be queried. 
+
+    Once setup correctly you should be able to browse the OGC Features API at <http://localhost:5000/railways/ogcapi/>.
 
 ## Possible Errors
 

workshop/exercises/mapfiles/railways.map

@@ -29,7 +29,7 @@ MAP
     WEB
         METADATA
             "ows_enable_request" "*" 
-            "ows_srs" "EPSG:4326 EPSG:3857" 
+            "ows_srs" "EPSG:4326 EPSG:3857"
         END
     END
     LAYER
@@ -78,6 +78,11 @@ MAP
         NAME "stops"
         STATUS OFF
         TYPE POINT
+        TEMPLATE "void"
+        METADATA
+            "gml_include_items" "all"
+            "gml_featureid" "osm_id"
+        END
         CONNECTIONTYPE FLATGEOBUF
         DATA "data/osm/transport.fgb"
         CLASSITEM "fclass"

workshop/exercises/mapfiles/wfs.map

@@ -30,7 +30,7 @@ MAP
         PROJECTION
             "init=epsg:4326"
         END
-        EXTENT -180.0 -90.0 180.0 90        
+        EXTENT -180.0 -90.0 180.0 90
         STATUS OFF
         METADATA
             "gml_featureid" "ne_id"