Mapviewer themes not rendering in correct order

Question

I have a map request that consists of three themes in this order:
1) wms_getmap_request grayscale evelation map
2) jdbc_query datalayer
3) wms_getmap_request state borders map
I assume that each of these layers would render in the order it is defined, so grayscale would be the base, followed by the datalayer, topped by the borders.
this is not the case. the wms_getmap_request layers are rendered first and the datalayer is placed over the top of them.
here is an example request:
<map_request
datasource="vuln_public"
srid="8265"
width="740"
height="405"
bgcolor="#ffffff"
transparent="true"
antialiase="true"
format="PNG8_STREAM">
<box>
<coordinates>-126.0,20.381081081081078 -66.0,53.21891891891892</coordinates>
</box>
<themes>          
          <theme name="GRAYSCALE_WMS">
               <wms_getmap_request>
                    <service_url>http://ims.cr.usgs.gov/servlet/com.esri.wms.Esrimap/USGS_EDC_Elev_GTOPO</service_url>
                    <version>1.1.1</version>
                    <layers>GTOPO60+Grayscale+Shaded+Relief</layers>
                    <styles></styles>
                    <srs>EPSG:4326</srs>
                    <format>image/png</format>
                    <transparent>true</transparent>
                    <vendor_specific_parameters>
                         <vsp>
                              <name>srs</name>
                              <value>EPSG:4326</value>
                         </vsp>
                         <vsp>
                              <name>transparent</name>
                              <value>true</value>
                         </vsp>                         
                         <vsp>
                              <name>format</name>
                              <value>image/png</value>
                         </vsp>
                    </vendor_specific_parameters>
               </wms_getmap_request>
          </theme>      
     <theme name="DATALAYER" user_clickable="false">
<jdbc_query ...>
SQL QUERY........
     </jdbc_query>
</theme>
<theme name="STATE_BORDERS_WMS">
     <wms_getmap_request>
                    <service_url>http://catalog4.usgs.umr.edu/cgi-bin/basevector</service_url>
                    <version>1.1.1</version>
                    <layers>stateprovince</layers>
                    <styles></styles>
                    <srs>EPSG:4326</srs>
                    <format>image/png</format>
                    <bgcolor>0x666666</bgcolor>
                    <transparent>true</transparent>
                    <vendor_specific_parameters>
                         <vsp>
                              <name>srs</name>
                              <value>EPSG:4326</value>
                         </vsp>
                         <vsp>
                              <name>transparent</name>
                              <value>true</value>
                         </vsp>     
                         <vsp>
                              <name>format</name>
                              <value>image/png</value>
                         </vsp>                         
                    </vendor_specific_parameters>
               </wms_getmap_request>
          </theme>     
</themes>
</map_request>
(the wms layers should work unless you're behind a firewall that's blocking them. you will have to add your own query.)
any way around this?
any help is appreciated

Answer 1

Hi Forum,
I have a similar problem but not quite the same one. I am creating Oracle Maps application with a georaster surface at the top (with certain level of transparency) along with a road network below it. But, probably due to this default MapViewer rendering, the road network is being rendered at the top of the Georaster surface even when I make the Georaster completely opaque.
I have created the map in MapBuilder and generated the tiles using MapViewer. While previewing the map in MapBuilder as well as looking at the generated tiles, I am facing the above problem. Can you please tell me whether I can set keepthemesorder="true" somewhere so that while generating the tiles I don't come across this problem.
Thanks a lot.
Regards,
Sudip