[mapguide-users] re: projection

Tue May 19 09:15:17 EDT 2009

Hi all,i am using projected coordinate system in my new map how to change the below code to accomodate this. Instead of ll84 i am using wgs84 and UTM&lt;%--&nbsp; -This file contains methods to create a temporary feature source and a temporary layer.&nbsp; --%&gt;&lt;%@ page contentType="text/html; charset=UTF-8" %&gt;&lt;%@ page import="org.osgeo.mapguide.*" %&gt;&lt;%@ page import="java.util.*" %&gt;&lt;%@ page import="java.io.*" %&gt;&lt;%@ page import="javax.xml.parsers.*" %&gt;&lt;%@ page import="javax.xml.transform.*" %&gt;&lt;%@ page import="javax.xml.transform.dom.*" %&gt;&lt;%@ page import="javax.xml.transform.stream.*" %&gt;&lt;%@ page import="org.w3c.dom.*" %&gt;&lt;%!// Create a temporary Feature Source to store the parcel marker locations.void CreatePropertyMarkerFeatureSource(MgFeatureService featureService, MgResourceIdentifier parcelMarkerDataResId) throws MgException{&nbsp;&nbsp;&nbsp; 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]]";&nbsp;&nbsp;&nbsp; MgClassDefinition propertyMarkerClass = new MgClassDefinition();&nbsp;&nbsp;&nbsp; propertyMarkerClass.SetName("PropertyMarker");&nbsp;&nbsp;&nbsp; MgPropertyDefinitionCollection properties = propertyMarkerClass.GetProperties();&nbsp;&nbsp;&nbsp; MgDataPropertyDefinition idProperty = new MgDataPropertyDefinition("ID");&nbsp;&nbsp;&nbsp; idProperty.SetDataType(MgPropertyType.Int32);&nbsp;&nbsp;&nbsp; idProperty.SetReadOnly(true);&nbsp;&nbsp;&nbsp; idProperty.SetNullable(false);&nbsp;&nbsp;&nbsp; idProperty.SetAutoGeneration(true);&nbsp;&nbsp;&nbsp; properties.Add(idProperty);&nbsp;&nbsp;&nbsp; MgDataPropertyDefinition PropIdProperty = new MgDataPropertyDefinition("PROPERTY_ID");&nbsp;&nbsp;&nbsp; PropIdProperty.SetDataType(MgPropertyType.String);&nbsp;&nbsp;&nbsp; PropIdProperty.SetLength(512);&nbsp;&nbsp;&nbsp; properties.Add(PropIdProperty);&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; MgDataPropertyDefinition ImageProperty = new MgDataPropertyDefinition("IMAGE");&nbsp;&nbsp;&nbsp; ImageProperty.SetDataType(MgPropertyType.String);&nbsp;&nbsp;&nbsp; ImageProperty.SetLength(512);&nbsp;&nbsp;&nbsp; properties.Add(ImageProperty);&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; MgGeometricPropertyDefinition locationProperty = new MgGeometricPropertyDefinition("Location");&nbsp;&nbsp;&nbsp; locationProperty.SetGeometryTypes(MgGeometryType.Polygon);&nbsp;&nbsp;&nbsp; locationProperty.SetHasElevation(false);&nbsp;&nbsp;&nbsp; locationProperty.SetHasMeasure(false);&nbsp;&nbsp;&nbsp; locationProperty.SetReadOnly(false);&nbsp;&nbsp;&nbsp; locationProperty.SetSpatialContextAssociation("LL84");&nbsp;&nbsp;&nbsp; properties.Add(locationProperty);&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; MgDataPropertyDefinition OwnerNameProperty = new MgDataPropertyDefinition("OWNER_NAME");&nbsp;&nbsp;&nbsp; OwnerNameProperty.SetDataType(MgPropertyType.String);&nbsp;&nbsp;&nbsp; OwnerNameProperty.SetLength(512);&nbsp;&nbsp;&nbsp; properties.Add(OwnerNameProperty);&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; MgPropertyDefinitionCollection idProperties = propertyMarkerClass.GetIdentityProperties();&nbsp;&nbsp;&nbsp; idProperties.Add(idProperty);&nbsp;&nbsp;&nbsp; propertyMarkerClass.SetDefaultGeometryPropertyName("Location");&nbsp;&nbsp;&nbsp; MgFeatureSchema propertyMarkerSchema = new MgFeatureSchema();&nbsp;&nbsp;&nbsp; propertyMarkerSchema.SetName("PropertyMarkerSchema");&nbsp;&nbsp;&nbsp; propertyMarkerSchema.GetClasses().Add(propertyMarkerClass);&nbsp;&nbsp;&nbsp; MgCreateSdfParams sdfParams = new MgCreateSdfParams("LL84", ll84Wkt, propertyMarkerSchema);&nbsp;&nbsp;&nbsp; featureService.CreateFeatureSource(parcelMarkerDataResId, sdfParams);}// Create a temporary Layer to display the parcel markers.MgLayer CreatePropertyMarkerLayer(MgResourceService resourceService, MgResourceIdentifier parcelMarkerDataResId, String sessionId) throws MgException, Exception{&nbsp;&nbsp;&nbsp; // Load the ParcelMarker layer definition template into&nbsp;&nbsp;&nbsp; // a JSP DOM object, find the "ResourceId" element, and&nbsp;&nbsp;&nbsp; // modify it's content to reference the temporary&nbsp;&nbsp;&nbsp; // feature source.&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();&nbsp;&nbsp;&nbsp; DocumentBuilder builder = factory.newDocumentBuilder();&nbsp;&nbsp;&nbsp; Document document = builder.parse(new File(getServletContext().getRealPath("/") + "xyz"&nbsp; + File.separator + "propertymarker.xml"));&nbsp;&nbsp;&nbsp; NodeList nodes = document.getElementsByTagName("ResourceId");&nbsp;&nbsp;&nbsp; Node resNode = nodes.item(0);&nbsp;&nbsp;&nbsp; Node resContent = document.createTextNode(parcelMarkerDataResId.ToString());&nbsp;&nbsp;&nbsp; resNode.appendChild(resContent);&nbsp;&nbsp;&nbsp; // write the modified layer XML definition into a byte stream&nbsp;&nbsp;&nbsp; //&nbsp;&nbsp;&nbsp; TransformerFactory tFactory = TransformerFactory.newInstance();&nbsp;&nbsp;&nbsp; Transformer transformer = tFactory.newTransformer();&nbsp;&nbsp;&nbsp; ByteArrayOutputStream bos = new ByteArrayOutputStream();&nbsp;&nbsp;&nbsp; DOMSource source = new DOMSource(document);&nbsp;&nbsp;&nbsp; StreamResult result = new StreamResult(bos);&nbsp;&nbsp;&nbsp; transformer.transform(source, result);&nbsp;&nbsp;&nbsp; // Save the updated layer definition to the session repository using the&nbsp;&nbsp;&nbsp; // ResourceService object.&nbsp;&nbsp;&nbsp; byte[] layerDefinition = bos.toByteArray();&nbsp;&nbsp;&nbsp; MgByteSource byteSource = new MgByteSource(layerDefinition, layerDefinition.length);&nbsp;&nbsp;&nbsp; byteSource.SetMimeType(MgMimeType.Xml);&nbsp;&nbsp;&nbsp; MgResourceIdentifier tempLayerResId = new MgResourceIdentifier("Session:" + sessionId + "//PropertyMarker.LayerDefinition");&nbsp;&nbsp;&nbsp; resourceService.SetResource(tempLayerResId, byteSource.GetReader(), null);&nbsp;&nbsp;&nbsp; // Create an MgLayer object based on the new layer definition&nbsp;&nbsp;&nbsp; // and return it to the caller.&nbsp;&nbsp;&nbsp; MgLayer propertyMarkerLayer = new MgLayer(tempLayerResId, resourceService);&nbsp;&nbsp;&nbsp; propertyMarkerLayer .SetName("PropertyMarker");&nbsp;&nbsp;&nbsp; propertyMarkerLayer .SetLegendLabel("Property Marker");&nbsp;&nbsp;&nbsp; propertyMarkerLayer .SetDisplayInLegend(true);&nbsp;&nbsp;&nbsp; propertyMarkerLayer .SetSelectable(true);&nbsp;&nbsp;&nbsp; return propertyMarkerLayer ;}%&gt;
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