GeographicItem generates GeoJSON 'feature'

app/helpers/geographic_items_helper.rb

@@ -1,6 +1,7 @@
 module GeographicItemsHelper
   def json_tag(geographic_item)
-    geographic_item.to_geo_json.html_safe
+    retval = geographic_item.to_geo_json_feature.html_safe
+    retval
   end
 
   def center_coord_tag(geographic_item)

app/models/geographic_area.rb

@@ -213,6 +213,10 @@ def default_geographic_item
     retval
   end
 
+  def default_geo_json
+    default_geographic_item.to_geo_json2
+  end
+
   def geo_object
     default_geographic_item
   end

app/models/geographic_item.rb

@@ -135,7 +135,7 @@ def st_start_point
       when :multi_polygon
         retval = o[0].exterior_ring.point_n(0)
       when :geometry_collection
-        to_geo_json =~ /(-{0,1}\d+\.{0,1}\d*),(-{0,1}\d+\.{0,1}\d*)/
+        to_geo_json_1 =~ /(-{0,1}\d+\.{0,1}\d*),(-{0,1}\d+\.{0,1}\d*)/
         retval = Georeference::FACTORY.point($1.to_f, $2.to_f, 0.0)
       else
         retval = nil
@@ -145,7 +145,7 @@ def st_start_point
 
   # Return an Array of [latitude, longitude] for the first point of GeoItem
   def start_point
-    to_geo_json =~ /(-{0,1}\d+\.{0,1}\d*),(-{0,1}\d+\.{0,1}\d*)/
+    to_geo_json_1 =~ /(-{0,1}\d+\.{0,1}\d*),(-{0,1}\d+\.{0,1}\d*)/
     [$2.to_f, $1.to_f]
 
     o = st_start_point
@@ -532,10 +532,22 @@ def rendering_hash
     data
   end
 
-  def to_geo_json
+  def to_geo_json_1
     RGeo::GeoJSON.encode(self.geo_object).to_json
   end
 
+  def to_geo_json_feature
+    retval = {
+      'type'       => 'Feature',
+      'geometry'   => RGeo::GeoJSON.encode(self.geo_object),
+      'properties' => {
+        'geographic_item' => {
+          'id' => self.id}
+      }
+    }
+    retval.to_json
+  end
+
   def to_a
     # get our object and return the set of points as an array
     we_are = self.geo_object

lib/gis/geo_json.rb

@@ -0,0 +1,60 @@
+module Gis::GeoJSON
+# not tested
+
+=begin
+ { "type": "FeatureCollection",
+    "features": [
+      { "type": "Feature",
+        "geometry": {"type": "Point", "coordinates": [102.0, 0.5]},
+        "properties": {"prop0": "value0"}
+        },
+      { "type": "Feature",
+        "geometry": {
+          "type": "LineString",
+          "coordinates": [
+            [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
+            ]
+          },
+        "properties": {
+          "prop0": "value0",
+          "prop1": 0.0
+          }
+        },
+      { "type": "Feature",
+         "geometry": {
+           "type": "Polygon",
+           "coordinates": [
+             [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
+               [100.0, 1.0], [100.0, 0.0] ]
+             ]
+         },
+         "properties": {
+           "prop0": "value0",
+           "prop1": {"this": "that"}
+           }
+         }
+       ]
+     }
+=end
+
+# @param objects [Array of instances that respond to .to_geo_json_1]
+def self.feature_collection(objects)
+  result = {
+      'type'       => 'FeatureCollection',
+      'features'   => []
+  }
+  objects.each_with_index do |o, i|
+    json = o.to_geo_json2.merge('id' => i)
+    result['features'].push json
+  end
+  result
+end
+
+# # @return [a Feature]
+# def to_geo_json_using_entity_factory
+#   f                   = RGeo::GeoJSON::EntityFactory.new
+#   inserted_attributes = {foo: "bar"} # some of self.attributes, but not all
+#   f.feature(self.geo_object, self.id, inserted_attributes)
+# end
+
+end

spec/support/geo/geo.rb

@@ -696,6 +696,7 @@ def generate_geo_test_objects
     puts
     @debug_names.collect { |k, v| print "#{' ' * 4}" + v.to_s + ": " + k.to_s }
     puts @debug_names.invert[@p1]
+
   end
   @debug_names
 end