= !MapGuide RFC 26 - Stylize Grid Surface=

This page contains an change request (RFC) for the !MapGuide Open Source project.  
More !MapGuide RFCs can be found on the [wiki:MapGuideRfcs RFCs] page.

== Status == 
 
||RFC Template Version||1.0|| 
||Submission Date||Aug 2, 2007||
||Last Modified||Maggie Yang [[Timestamp]]||
||Author||Maggie Yang||
||RFC Status||draft||
||Implementation Status||under development||
||Proposed Milestone||1.3||
||Assigned PSC guide(s)||(when determined)||
||'''Voting History'''||(vote date)||
||+1||||
||+0||||
||-0||||
||-1||||
 
== Overview ==

The purpose of this RFC is to allow !MapGuide to stylize the elevation data, which configured surface style in its layer definition.

== Motivation ==

Map 3D can publish stylized elevation layer, such as DEM and GeoTIFF file to !MapGuide. The layer definition for an elevation data in Map 3D would like below, with surface style:
{{{
<LayerDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:noNamespaceSchemaLocation="LayerDefinition-1.0.0.xsd" version="1.0.0">
<GridLayerDefinition>
  <ResourceId>Library://Publish/Data/Raster_1.FeatureSource</ResourceId> 
  <FeatureName>rasters:davenport</FeatureName> 
  <Geometry>Image</Geometry> 
  <GridScaleRange>
    <SurfaceStyle>
      <Band>1</Band> 
      <DefaultColor>0000FF00</DefaultColor> 
    </SurfaceStyle>
    <ColorStyle>
      <HillShade>
        <Band>1</Band> 
        <Azimuth>45</Azimuth> 
        <Altitude>45</Altitude> 
      </HillShade>
      <ColorRule>
        <LegendLabel>-1.79e+308 to 1.79e+308</LegendLabel> 
        <Filter>(Height(1) > -1.7976931348623158e+308) AND (Height(1) < 1.7976931348623158e+308)</Filter> 
        <Color>
          <ExplicitColor>FF00FF00</ExplicitColor> 
        </Color>
      </ColorRule>
      <ColorRule>
        <LegendLabel>{DEFAULT}</LegendLabel> 
        <Color>
          <ExplicitColor>FF006423</ExplicitColor> 
          </Color>
      </ColorRule>
    </ColorStyle>
    <RebuildFactor>1</RebuildFactor> 
  </GridScaleRange>
</GridLayerDefinition>
}}}

While, !MapGuide cannot display this elevation data published from Map 3D with surface style, because the !MapGuide do not have the stylization mechanism for grid surface data. 
So, in this release, we will make !MapGuide has the ability to stylize the elevation layer. If publish a stylized elevation layer from Map 3D to !MapGuide, the user would see Figure 1 in !MapGuide Studio in the future, not the Figure 2, which is the current status for elevation data in !MapGuide.

||[[Image(After.JPG, align=center)]]|| instead of ||[[Image(Before.JPG, align=center)]]||
||Figure1|| ||Figure2||

== Proposed Solution ==

The proposed solution contains modifications to: Platformbase and Stylization projects.


== Implications ==

This RFC does not describe any GUI modifications and does not affect the existed published API.

== Test Plan ==

After publishing a elevation data from Map 3D to !MapGuide server, the elevation image should display as it was shown in Map 3D.

== Funding/Resources ==

Supplied by Autodesk.