<%@ Page language="c#" ValidateRequest="false" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Collections.Specialized" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="OSGeo.MapGuide" %>
<%
//
// Copyright (C) 2004-2011 by Autodesk, Inc.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of version 2.1 of the GNU Lesser
// General Public License as published by the Free Software Foundation.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
//
sessionId = Request.Params["SESSION"];
String xmlSelection = HttpUtility.UrlDecode(Request.Params["SELECTION"]);
mapName = Request.Params["MAPNAME"];
double mapScale = Convert.ToDouble(Request.Params["SCALE"]);
int imageHeight = Convert.ToInt32(Request.Params["HEIGHT"]);
int imageWidth = Convert.ToInt32(Request.Params["WIDTH"]);
double mapCenterX = Convert.ToDouble(Request.Params["CENTERX"]);
double mapCenterY = Convert.ToDouble(Request.Params["CENTERY"]);
try
{
// Initialize the Web Extensions and connect to the Server using
// the Web Extensions session identifier stored in PHP session state.
MapGuideApi.MgInitializeWebTier (Constants.WebConfigPath);
MgUserInformation userInfo = new MgUserInformation(sessionId);
MgSiteConnection siteConnection = new MgSiteConnection();
siteConnection.Open(userInfo);
// Create the necessary services.
MgResourceService resourceService = (MgResourceService)siteConnection.CreateService(MgServiceType.ResourceService);
MgRenderingService renderingService = (MgRenderingService)siteConnection.CreateService(MgServiceType.RenderingService);
// Open the map and get its SRS
MgMap map = new MgMap(siteConnection);
map.Open(mapName);
String srsWkt = map.GetMapSRS();
MgCoordinateSystemFactory coordinateSystemFactory = new MgCoordinateSystemFactory();
MgCoordinateSystem srs = coordinateSystemFactory.Create(srsWkt);
MgSelection selection = null;
if (!string.IsNullOrEmpty(xmlSelection))
{
selection = new MgSelection(map, xmlSelection);
}
else
{
selection = new MgSelection(map);
}
MgColor color = new MgColor(205, 189, 156);
MgGeometryFactory geometryFactory = new MgGeometryFactory();
MgCoordinate mapCenterCoordinate = geometryFactory.CreateCoordinateXY(mapCenterX, mapCenterY);
// Convert the height in pixels to map units.
// Create an envelope that contains the image area to display.
double displayInInches = imageHeight / 96;
double displayInMeters = displayInInches * .0254;
double mapHeightInMeters = displayInMeters * mapScale;
double mapHeightInMapUnits = srs.ConvertMetersToCoordinateSystemUnits(mapHeightInMeters);
double envelopeOffsetY = mapHeightInMapUnits / 2;
double envelopeOffsetX = imageWidth / imageHeight * envelopeOffsetY;
MgEnvelope envelope = new MgEnvelope(mapCenterX - envelopeOffsetX,
mapCenterY - envelopeOffsetY, mapCenterX + envelopeOffsetX,
mapCenterY + envelopeOffsetY);
// Render the image and send it to the browser.
MgByteReader byteReader = renderingService.RenderMap(map, selection, envelope, imageWidth, imageHeight, color, "PNG");
Utility.OutputReaderContent(byteReader, Response);
}
catch (MgException e)
{
Response.Write("" + e.GetExceptionMessage() + "
");
Response.Write("" + e.GetDetails() + "
");
}
%>