RasterRenderingRule: Readme Update (#349)

Author: JonLavi

src/main/java/com/esri/samples/raster/raster_rendering_rule/README.md

@@ -1,12 +1,12 @@
-<h1>Raster Rendering Rule</h1>
+<h1>Raster rendering rule</h1>
 
 <p>Display a raster on a map and apply different rendering rules to that raster.</p>
 
 <p><img src="RasterRenderingRule.png"/></p>
 
-<h2>Use case</h1>
+<h2>Use case</h2>
 
-<p>A single raster image can be rendered in a number of different ways, including representation of slope aspect, hillshade and shaded relief. Applying these different renderers to the same raster allows for a powerful visual analysis of the data. For example, a geologist could interrogate the raster image using all available renderers to map subtle geological features on a landscape not apparent in a regular aerial photograph.</p>
+<p>Raster images whose individual pixels represent elevation values can be rendered in a number of different ways, including representation of slope, aspect, hillshade, and shaded relief. Applying these different rendering rules to the same raster allows for a powerful visual analysis of the data. For example, a geologist could interrogate the raster image to map subtle geological features on a landscape, which may become apparent only through comparing the raster when rendered using several different rules.</p>
 
 <h2>How to use the sample</h2>
 
@@ -15,12 +15,12 @@
 <h2>How it works</h2>
 
 <ol>
-  <li> Create an <code>ImageServiceRaster</code> using a URL to an online image service. </li>
-  <li> After loading the raster, use <code>imageServiceRaster.getServiceInfo().getRenderingRuleInfos()</code> to get a list of <code>RenderingRuleInfo</code> supported by the service. </li>
-  <li> Choose a rendering rule info to apply and use it to create a <code>RenderingRule</code>. </li>
-  <li> Create a new <code>ImageServiceRaster</code> using the same URL. </li>
-  <li> Apply the rendering rule to the new raster using <code>imageServiceRaster.setRenderingRule(renderingRuleInfo)</code>. </li>
-  <li> Create a <code>RasterLayer</code> from the raster for display. </li>
+  <li>Create an <code>ImageServiceRaster</code> using a URL to an online image service.</li>
+  <li>After loading the raster, use <code>imageServiceRaster.getServiceInfo().getRenderingRuleInfos()</code> to get a list of <code>RenderingRuleInfo</code> supported by the service.</li>
+  <li>Choose a rendering rule info to apply and use it to create a <code>RenderingRule</code>.</li>
+  <li>Create a new <code>ImageServiceRaster</code> using the same URL.</li>
+  <li>Apply the rendering rule to the new raster using <code>imageServiceRaster.setRenderingRule(renderingRuleInfo)</code>.</li>
+  <li>Create a <code>RasterLayer</code> from the raster for display.</li>
 </ol>
 
 <h2>Relevant API</h2>
@@ -35,6 +35,10 @@
 
 <p>This raster image service contains 9 LAS files covering Charlotte, North Carolina's downtown area. The lidar data was collected in 2007. Four Raster Rules are available for selection: None, RFTAspectColor, RFTHillshade, and RFTShadedReliefElevationColorRamp.</p>
 
+<h2>Additional information</h2>
+
+<p>Image service rasters of any type can have rendering rules applied to them; they need not necessarily be elevation rasters. For a list of raster functions and the syntax for rendering rules, see the ArcGIS REST API documentation: https://developers.arcgis.com/documentation/common-data-types/raster-function-objects.htm.</p>
+
 <h2>Tags</h2>
 
 <p>raster, rendering rules, visualization</p>