(DOCSP-6586) Polygon filters in the Schema map view (#195)

* (DOCSP-6586) Create polygon filters in the Schema map view

* Wording

* Wording

* Changes based on review

* Update screenshot

Author: zach-carr

source/images/compass/geo-visualization.png

@@ -279,11 +279,20 @@ Apply a Location Filter
 You can apply a filter to the map to only analyze a specific
 range of points. To define a location filter:
 
-1. Click the :guilabel:`Circle` button at the top-right
-   of the map.
-   
-#. Click and drag on the map to draw a circle containing the area of
-   the map you want to analyze.
+1. Depending on the shape of filter you want to create, click the
+   :guilabel:`Circle` or :guilabel:`Polygon` button at
+   the top-right of the map.
+
+#. Draw filters around the area of the map
+   you want to analyze. You may draw multiple filters on a single map.
+
+   - To draw a :guilabel:`Circle`, click to place the center point and
+     drag to adjust the diameter of the circle.
+
+   - To draw a :guilabel:`Polygon`, click to place vertices. Each
+     vertex is connected to the previous vertex by a line. To
+     finish the polygon, close it by clicking on your first vertex. You
+     must place at least 3 vertices to construct a polygon.
 
 #. Repeat this process as desired to include additional areas of
    the map in the schema analysis.
@@ -297,6 +306,14 @@ the exact coordinates used in the
 :manual:`$geoWithin </reference/operator/query/geoWithin/>` query
 applied to the schema analysis.
 
+:guilabel:`Circle` filter queries use ``$geoWithin`` with the 
+:manual:`$centerSphere </reference/operator/query/centerSphere/>`
+operator.
+
+:guilabel:`Polygon` filter queries use ``$geoWithin`` with the
+:manual:`$geometry </reference/operator/query/geometry/>`
+operator set to ``type: "Polygon"``.
+
 If you specify multiple location filters, the query becomes
 an :manual:`$or </reference/operator/query/or/>` query
 with multiple ``$geoWithin`` operators.
@@ -312,11 +329,19 @@ looks like this:
    :figwidth: 575px
    :alt: Image showing map filter editing
 
-To move a filter
-  Click and drag the square in the center of the circle.
+Edit a :guilabel:`Circle`
+  - To move a circle filter, click and drag the square in the center of
+    the circle.
+
+  - To resize a circle filter, click and drag the square at the edge of
+    the circle.
+
+Edit a :guilabel:`Polygon`
+  - To reposition a vertex of a polygon filter, click and drag the
+    square on that vertex.
 
-To resize a filter
-  Click and drag the square at the edge of the circle.
+  - To add a vertex to a polygon filter, click and drag the square at
+    the center of an existing line.
 
 After modifying your filters, click :guilabel:`Save`.