Infrastructure Modeling DevBlog

Intelligent landing page for AIMS/MapGuide Ajax viewer

By Daniel Du

You may come across the InitialMapView sample page in php, It expects the values to be passed to the script as query string parameters, and zoom to specified view port when loading the map. Here is an intelligent landing page MapGuide Viewer in .NET, and with more extended functionalities.

 

What is the function of this sample application?

1. Zoom to specified view port by initial x, y and scale, the URL is expected as below: http://serverName/MgViewerExtention/Default.aspx?X=-87.723233&Y=43.754561&scale=5000
It works by taking a copy of the WebLayout stored in the Library repository and changing the <CenterX/>, <CenterY/> and <Scale/> elements. The updated XML is written into the Session and is used as the target when the page is ultimately loaded.

 

2. Query, zoom to and highlight by filter string. It accepts layer name, keyFieldID and id value, for following URL, map viewer zooms to the objects corresponding to “Autogenerated_SDF_ID in (1812,1813)” in the layer Parcels, highlighted if “highlight=1”.

http://localhost/MgViewerExtention/Default.aspx?Layer=Parcels&KeyField=Autogenerated_SDF_ID&ListId=1812,1813&highlight=1

 

3. Filter features shown on map. You may have thousands even millions of features in a data source, but sometime you do not need to show all of them on map. With a filter string in URL, you can filter the features in MapGuide viewer when the viewer shows up. With following URL, I only show the parcels which Autogenerated_SDF_ID great than 1000:

http://localhost/MgViewerExtention/Default.aspx?Layer=Parcels&layerfilter=Autogenerated_SDF_ID > 10000

 

The sample project can be downloaded here, it is based on AIMS 2013, but it could be easy to apply it to other version of AIMS/MapGuide. If you are interested in how it is implemented in detail, please download and read the code. Hope it helps.

Download MgViewerExtention

 

[Updated: October, 26, 2012]

How to install this sample application?

I am often asked how to install/use this sample application, here is the detailed steps:

1. unzip the sample application to a folder of your web server where Map Server Extension is installed. Let’s say: C:\Work\CodeSamples\MgViewerExtention

2. Copy all dlls from “C:\Program Files\Autodesk\Autodesk Infrastructure Web Server Extension 2013\www\mapviewernet\bin” to “C:\Work\CodeSamples\MgViewerExtention\MgViewerExtention\bin”

3. Copy “WebConfig.ini” from “C:\Program Files\Autodesk\Autodesk Infrastructure Web Server Extension 2013\www” to “C:\Work\CodeSamples\MgViewerExtention\MgViewerExtention”

4. Since I am using web application as visual studio project, you need to rebuild the project. Open the “MgViewerExtention.sln” file in Visual Studio 2010, add references to OSGeo.MapGuide.* from MgViewerExtention\bin folder and set “CopyLocal” to FALSE. Then Build and fix any outstanding problems.

5. Open Internet Information Services(IIS) Manager by typing “inetmgr” in Start –> Run

6. Add a application in IIS. Right click “Default Web Site” and select “Add Application”, input alias as “MgViewerExtension”, please note that the URL to access this web application will be http://localhost/<yourAliasName>, for me it is http://localhost/MgViewer/Extension.  It is recommend to select "MapServer2013App” as application pool. You will notice that it is using .net Framework 4.0 for AIMS2013.  The physical path refers to the folder which contains the ASPX web page, for me, it is C:\Work\CodeSamples\MgViewerExtention\MgViewerExtention.

7. Give it a run and test, refer to the top of this post for test URLs.

 

How to Debug and Extend this further?

1. Open the “MgViewerExtention.sln” solution is Visual Studio 2010, set an break points at somewhere.

2. Launch the browser to the MgViewerExtension.

3. Attach to process from Debug menu, attach to “w3wp”, please note the username should be “MapServer2013App” as it may have more than one “w3wp” process.

4. Refresh the webpage, your break point will be hit.

Please refer to this video at MapServer Developer Center, it is for AIMS 2012 x64, but it still applies to AIMS 2013 as well.

Video : Autodesk® Infrastructure Map Server 2012 API Webcast
Recorded version of the Autodesk® Infrastructure Map Server 2012 API webcast
View Online | Download

 

It should be easy to use it for AIMS 2012 as well, Here are some critical point to be noticed:

1. Using the correct Dlls/References of AIMS2012

2. Change Target Framework to .NET Framework 3.5 in Visual Studio.

3. Change the url of viewer path:

     string viewerPathSchema = @"/mapserver2012/mapviewerajax/
       ajaxviewer.aspx?Weblayout={1}&SESSION={0}";

4.  Rebuild and fix any outstanding problems.

5.  Select an application pool with .NET Framework 2.0(ASP.NET 2.0) when creating Applications in IIS:

 

Hope this helps.

Coordinate Transformation using Map LISP API

By Partha Sarkar

How to use Map LISP function ade_projptforward to achieve coordinate transformation?

Here is a LISP code snippet which demonstrates the same :

;;Coordinate transform with LISP.

(defun c:test (/ result pt)
(ade_projsetsrc "LL")
(ade_projsetdest "ITALY-W-ROME")
(setq result(ade_projptforward '(10.0 20.0 0.0)))
(if(null result)
(prompt "\nError in Transformation ")
)
(princ result)
);

How to set Pipe Network Part's Data Fields (PartDataField)?

By Partha Sarkar

I am trying to use Civil 3D .NET API to set the Pipe Object's PartDataField e.g. Pipe's Manning Coefficient. Could you help me with a code snippet to do this?

 

Civil 3D .NET API allows us to set / edit the PartDataField value. First you need to open the Part (Pipe or Structure) for write, get a reference to the Part object's PartData property (type PartDataRecord), modify the PartDatafield value, and then re-set the Part's PartData.

 

Here is a C# code snippet which demonstrates updating Pipe's Part Data values (Manning Coefficient):

using (Transaction ts = Application.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())

{

  Pipe PipeEle = ts.GetObject(pipeID, OpenMode.ForWrite) as Pipe;

  PartDataRecord record = PipeEle.PartData;

  PartDataField PartDataFld = record.GetDataFieldBy(PartContextType.FlowAnalysisManning);

 

  ed.WriteMessage("\nManning Coefficient Value Before Change : " + PartDataFld.Value.ToString());

 

  // Change the inner data of the copy:

  PartDataFld.Value = 0.014;

 

  // Re-set the PartData property. 

  //The data will not be updated without this

 

  PipeEle.PartData = record;

 

  ed.WriteMessage("\nManning Coefficient Value After Change : " + PartDataFld.Value.ToString());

 

  ts.Commit();

}

 

How to apply Coordinate system Transformation using API ?

By Partha Sarkar

Coordinate transformation is converting a coordinate value in one coordinate system into its equivalent in another coordinate system.

 

Here is a code snippet which demonstrates how to apply Coordinate system Transformation :

string mapSRS = AcMapMap.GetCurrentMap().GetMapSRS();

// create MgCoordinateSystemFactory

 

MgCoordinateSystemFactory coordSysFactory = new MgCoordinateSystemFactory();

MgCoordinateSystem coordSys = coordSysFactory.Create(mapSRS);

MgCoordinateSystem wgs84Sys = coordSysFactory.Create("LL84");

 

MgCoordinateSystemTransform transform = null;

transform = coordSysFactory.GetTransform(wgs84Sys, coordSys);

MgCoordinate coord = null;

 

if (transform != null && !double.IsNaN(pnt.Z))

  coord = transform.Transform(pnt.Z, pnt.Y, pnt.Z);

else

  coord = transform.Transform(pnt.X, pnt.Y);   

How to extract all of the coordinate system names from the coordinate system dictionary and check their types?

By Partha Sarkar

The OSGeo.MapGuide namespace contains a set of classes which provide access to the CS-Map coordinate system functionality in both the AutoCAD Map 3D and AIMS environments.

MgCoordinateSystemFactory is used to get the coordinate system categories and the coordinate system catalog. MgCoordinateSystemCatalog is used to get the various dictionaries. MgCoordinateSystemDictionary contains definitions for earth-based and Euclidean coordinate systems.

 

The following code extracts all of the coordinate system names from the coordinate system dictionary, uses those names to get all of the coordinate system definitions from the dictionary and determines the type (projected, geographic, or arbitrary) of the coordinate system from its definition, and stores the name of the coordinate system in a list according to its type. 

//MgCoordinateSystemFactory coordSysFactory = new MgCoordinateSystemFactory();

//MgCoordinateSystemCatalog csCatalog = coordSysFactory.GetCatalog();

//MgCoordinateSystemDictionary csDict = csCatalog.GetCoordinateSystemDictionary();

 

List<string> arbitraryCs = new List<string>();

List<string> geographicCs = new List<string>();

List<string> projectedCs = new List<string>();

 

MgCoordinateSystemEnum csDictEnum = csDict.GetEnum();

 

// the following line gets all of the names in the dictionary

// uses those names to get the coordinate

 

int csCount = csDict.GetSize();

ed.WriteMessage("\nCoordinate System Count : " + csCount.ToString());

ed.WriteMessage("\n-------------------------------------------------");

MgStringCollection csNames = csDictEnum.NextName(csCount);

string csName = null;

MgCoordinateSystem cs = null;

int csType = 0;

for (int i = 0; i < csCount; i++)

{

 csName = csNames.GetItem(i);

 cs = csDict.GetCoordinateSystem(csName);

 csType = cs.GetType();

 if (csType == MgCoordinateSystemType.Arbitrary)

 {

  arbitraryCs.Add(csName);

 }

 else if (csType == MgCoordinateSystemType.Geographic)

 {

  geographicCs.Add(csName);

 }

 else if (csType == MgCoordinateSystemType.Projected)

 {

  projectedCs.Add(csName);

 }         

  ed.WriteMessage("\nCoordinate System Name : " + csName.ToString());

}

Hope this is useful to you !

Autodesk.Civil.DatabaseServices.PointGroupQueryParserException: Invalid value for property !

By Partha Sarkar

While creating a custom Point Group query using CustomPointGroupQuery class, when you call the SetQuery() function with your custom query string sometimes you may see the following exception message :  Invalid value for property !

Most likely cause of this exception is improper query string formation. I will give you an example here.

 

If we build a StandardPointGroupQuery object, we can set a condition like the following and all works fine :

StandardPointGroupQuery standardPointGrpQry = new StandardPointGroupQuery();           

standardPointGrpQry.IncludeNumbers = "550-560, 565-572";

 

However, when we build a CustomPointGroupQuery, and we try build a query string like the following : 

CustomPointGroupQuery customPointGrpQry = new CustomPointGroupQuery();

string queryString = "(RawDescription='TO*') AND (PointNumber='600-1000')"; // Doesn't work

 

You would see the excpetion message - "Invalid value for property !" when you try to execute SetQuery(customPointGrpQry).

To include a range of Points, you need to build query string like the following : 

CustomPointGroupQuery customPointGrpQry = new CustomPointGroupQuery();

string queryString = "(RawDescription='TO*') AND (PointNumber>=600 AND PointNumber<=1000) "; // this works

 

Hope this is useful to you !

How do I turn off the "Map Base" Layer using API ?

By Partha Sarkar

I want to switch off the "Map Base" Layer using Map 3D API.

 

 

Here is the C# code snippet to switch off the "Map Base" Layer using Map 3D managed API :

 

using (Transaction trans = transManager.StartTransaction())

{

  ObjectId managerId = DisplayManager.Create(proj).MapManagerId(proj, true);

  MapManager manager = trans.GetObject(managerId, OpenMode.ForRead) as MapManager;

 

  if (manager != null)

  {

    currentmapId = manager.CurrentMapId;

    Map currentMap = trans.GetObject(currentmapId, OpenMode.ForWrite) as Map;

 

    IEnumerator iterator = currentMap.NewIterator(true, true);

    Type groupType = typeof(Autodesk.Gis.Map.DisplayManagement.Group);

 

    while (iterator.MoveNext())

    {

      ObjectId objId = (ObjectId)iterator.Current;

      Object obj = trans.GetObject(objId, OpenMode.ForWrite);             

 

      if (obj.GetType().ToString() == "Autodesk.Gis.Map.DisplayManagement.BaseElement")

      {

        Autodesk.Gis.Map.DisplayManagement.BaseElement baseElement = obj as Autodesk.Gis.Map.DisplayManagement.BaseElement;

        baseElement.SetVisible(0, false);                 

      }

    }

  }

  trans.Commit();

}

Change Alignment Curve Label style to General Curve Label Styles using Civil 3D .NET API

By Partha Sarkar

In Civil 3D UI when we use the Change Label Style command (LabelStyleEdit) on Alignment Curve Label, we get the option of selecting a Label Style from Alignment -> Label Styles -> Curve -> Label Styles collection  as well as General Curve Label Styles (Styles listed under General -> Multipurpose Styles  -> Curve). And we can change the label style to one from the General Curve Label Styles.

 

Screenshot below explains the situation described above:

 

 

Here is a C# code snippet which demonstrates how to achieve the same using Civil 3D .NET API:

try

{

    AlignmentCurveLabel alignCurveLbl = (AlignmentCurveLabel)tr.GetObject(pres.ObjectId, OpenMode.ForWrite);

    ed.WriteMessage("\nAlignment Curve Label Style Name (before Change) : " + alignCurveLbl.StyleName.ToString());                   

 

    CivilDocument curDoc = CivilApplication.ActiveDocument;

    LabelStyleCollection lStyles = curDoc.Styles.LabelStyles.GeneralCurveLabelStyles;

    // The following Style Name is specific to Tutorial DWG file - "Labels-6a.dwg"

    string stylesFound = "Distance-Radius and Delta";

 

    foreach (ObjectId stId in lStyles)

    {

      LabelStyle generalCurveLblStyl = tr.GetObject(stId, OpenMode.ForRead) as LabelStyle;

      if (generalCurveLblStyl.Name.ToString() == stylesFound)

      {

        alignCurveLbl.StyleId = generalCurveLblStyl.Id;

        break;

      }                     

    }

    ed.WriteMessage("\nAlignment Curve Label Style Name (after Change) : " + alignCurveLbl.StyleName.ToString());                   

}

 

Hope this is useful to you!

Get or Set DisplayStyles for MassHaulViewStyle using .NET API

By Partha Sarkar

In Civil 3D 2012 and earlier releases there were some issues in accessing some of the display styles (listed below) for a MassHaulViewStyle object:

 

MassHaulViewDisplayStyleType.MiddleAxis

MassHaulViewDisplayStyleType.MiddleAxisTitle

MassHaulViewDisplayStyleType.MiddleAxisAnnotationMajor

MassHaulViewDisplayStyleType.MiddleAxisAnnotationMinor

MassHaulViewDisplayStyleType.MiddleAxisTicksMajor

MassHaulViewDisplayStyleType.MiddleAxisTicksMinor

MassHaulViewDisplayStyleType.GridAtSampleLineStations

 

In 2013 release of Civil 3D .NET API, this issue is fixed and you can now access and set these displayStyles for a MassHaulViewStyle using .NET API.

 

Here is a C# code snippet :

using (Transaction tr = db.TransactionManager.StartTransaction())

{

  MassHaulViewStyle style = tr.GetObject(oId, OpenMode.ForWrite) as MassHaulViewStyle;

 

  DisplayStyle displayStyleMiddleAxis =

    style.GetDisplayStylePlan(Autodesk.Civil.MassHaulViewDisplayStyleType.MiddleAxis);

 

  DisplayStyle displayStyleMiddleAxisTitle =

    style.GetDisplayStylePlan(Autodesk.Civil.MassHaulViewDisplayStyleType.MiddleAxisTitle);

 

  DisplayStyle displayStyleMiddleAxisAnnotationMajor =

    style.GetDisplayStylePlan(Autodesk.Civil.MassHaulViewDisplayStyleType.MiddleAxisAnnotationMajor);

 

  DisplayStyle displayStyleMiddleAxisAnnotationMinor =

    style.GetDisplayStylePlan(Autodesk.Civil.MassHaulViewDisplayStyleType.MiddleAxisAnnotationMinor);

 

  DisplayStyle displayStyleMiddleAxisTicksMajor =

    style.GetDisplayStylePlan(Autodesk.Civil.MassHaulViewDisplayStyleType.MiddleAxisTicksMajor);

 

  // Works fine in Civil 3D 2013

  try

  {

    ed.WriteMessage("\n" + displayStyleMiddleAxis.Layer);

    displayStyleMiddleAxis.Layer = "0";

 

  }

  catch (System.Exception ex)

  {

    ed.WriteMessage("\n" + ex.Message);

  }

 

  try

  {

    ed.WriteMessage("\n" + displayStyleMiddleAxisTitle.Layer);

    displayStyleMiddleAxisTitle.Layer = "0";

  }

  catch (System.Exception ex)

  {

    ed.WriteMessage("\n" + ex.Message);

  }

 

  // Similar way we can access or set other DisplayStyle properties of MassHaulViewStyle               

  //...

 

  tr.Commit();

}

 

Hope this is useful to you!