[mapguide-users] findparcelfunctions.aspx

[Jason Birch]

That OGC well known text representation of the LL84 Coordinate Reference
System (CRS) is being used to create the marker's SDF feature source:

    MgCreateSdfParams sdfParams = new MgCreateSdfParams("LL84", ll84Wkt,
parcelMarkerSchema);
    featureService.CreateFeatureSource(parcelMarkerDataResId,
sdfParams);

So I think that it would make sense that it's affecting your markers.

The CreateFeatureSource docs are here:
https://mapguide.osgeo.org/nonav/docs/webapi/d5/d10/class_mg_feature_ser
vice_ab9a61218e9ea48601edfde782272055.html
<https://mapguide.osgeo.org/nonav/docs/webapi/d5/d10/class_mg_feature_se
rvice_ab9a61218e9ea48601edfde782272055.html> 

You can pull the spatial context for one of your existing layers through
the mapagent api tests.
 - Go to http://localhost/mapguide/mapagent/index.html
<http://localhost/mapguide/mapagent/index.html> 
 - Click on "Resource service API" in the upper left pane
 - Click on "EnumerateResources " in the lower left pane
 - In the right pane, fill in "Library://" as the Resource ID and
"FeatureSource" as the Type and click on Submit.
 - Copy the contents of the <ResourceID> tag for the feature source with
your desired CRS into your clipboard.
    e.g. Library://Samples/Sheboygan/Data/CityLimits.FeatureSource

 - Click on "Feature service API" in the upper left pane
 - Click on "GetSpatialContexts " in the lower left pane
 - Paste the previously copied Resource ID into the Resource ID field in
the right pane and click on Submit

 - The WKT for your CRS should be revealed in the CoordinateSystemWkt
tag

Jason



________________________________

From: Chris Tallman [mailto:ctallman at innomap.com]
Sent: Wednesday, April 05, 2006 08:57
To: users at mapguide.osgeo.org
Subject: [mapguide-users] findparcelfunctions.aspx


Can someone explain this line from the findparcelfunctions.aspx page.

String ll84Wkt = "GEOGCS[\"LL84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS
84\",6378137,298.25722293287],TOWGS84[0,0,0,0,0,0,0]],PRIMEM[\"Greenwich
\",0],UNIT[\"Degrees\",1]]";

specifically does it need to be edited if I'm using a different
Coordinate system?  Say IN83-EF.

I think I have everything working with my map reusing the
findparcel.aspx other than the markers are not placed.  I think this
line may be placing the marker off the map.



Chris Tallman
260.407.1761



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