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 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.

	instead of
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.