[mapguide-users] help

Tue May 19 07:03:26 EDT 2009

but please if you know what that UNIT means in coordinates System say it me:

<CoordinateSystem>GEOGCS["WGS84 Lat/Long's, Degrees, -180 ==>
+180",DATUM["D_WGS_1984",SPHEROID["World_Geodetic_System_of_1984",6378137,298.257222932867]],PRIMEM["Greenwich",0],
*UNIT*["Degree",0.017453292519943295]]</CoordinateSystem>
cause i want draw polygone representing view of cam (dome) and it must be
proportional to the real view of cam, and my layer must be added to map with
another layer wich contains cams so i must know wich units is used on map(m,
km, cm) or what? that what i do that i convert (m) to unit by this code:

MgCoordinateSystemFactory csFactory = new MgCoordinateSystemFactory();

MgCoordinateSystem srs = csFactory.Create(map.GetMapSRS());

MgCoordinateSystemMeasure mesure = new MgCoordinateSystemMeasure(srs);

distanceunits = pointa.Distance(pointb, mesure);

Response.Write("distance entre les deux points du calque en unit‚: "
+distanceunits.ToString());

distancemeters = srs.ConvertCoordinateSystemUnitsToMeters(distanceunits);

but i don't know if this layer (wich contains polygone) will be compatible
with another layer or not? if you don't understand me say it me please.
thanks or advance, i ask you cause i remark that you master more than
onother mapguide developpers mapguide, thanks on advance.

2009/5/19 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>

> There is an example for MgCreateSdfParams() in the "buffer.(php|aspx|jsp)"
> file in the folder
> C:\program
> files\MapGuideOpenSource2.0\WebServerExtensions\www\mapviewer(php|net|java)
>
> It also shows how to set the coordinate system.
> If your data has the correct projection, MapGuide will convert it to fit
> the map projection.
> If that does not work, you have to manually convert the items, which is not
> a trivial procedure.
>
> Regards, Kenneth Skovhede, GEOGRAF A/S
>
>
>
> saloua wakrim skrev:
>
> hi! did you know lease how MgCreateSdfParams() works and what attributes i
> must give it cause ii think that the prob i have is coordinates i use for
> inserting polygone or line or point wich are not compatibl with map
> cordinates
>
> 2009/5/11, Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>:
>>
>> Yes, that looks right.
>>
>> You must also refresh the map (refresh/pan/zoom/etc.) in the browser via
>> javascript.
>>
>> In addition to my other suggestions, you can also check the error log for
>> messages.
>>
>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>
>>
>>
>>
>> saloua wakrim skrev:
>>
>> hi! please i want know if this code is that what all i must do for adding
>> new layer to map and see it in viewer frame or i must do some relation with
>> the feature source i create in my code?? thanks on advance
>>
>>
>> myLayer =
>> New MgLayer(layerDefId, resourceSrvc)
>>
>> myLayer.SetName(myLayerName)
>>
>> myLayer.SetLegendLabel(myLayerName)
>>
>> myLayer.SetDisplayInLegend(
>> True)
>>
>> myLayer.SetSelectable(
>> False)
>>
>> map.GetLayers().Insert(0, myLayer)
>>
>> myLayer.ForceRefresh()
>> map.Save(resourceSrvc)
>>
>>
>> 2009/5/10 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>
>>
>>> The code looks alright.
>>> Do you refresh the map afterwards?
>>> What is in the "insertResults" ?
>>> (There can be a hidden error, due to a bug in MapGuide)
>>> Are you sure that the LayerDefinition matches the FeatureSource?
>>> Try to create the FeatureSource and LayerDefinition in "Library://"
>>> instead,
>>> so you can examine the layer from Studio/Maestro.
>>>
>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>
>>>
>>>
>>>
>>> saloua wakrim skrev:
>>>
>>>  i try the following code for displaying layer wich contains line in
>>> map, so i digitize a line, create temporary feature for this line, create a
>>> layer wich contains it and add it to the map. it doesn't give me some error
>>> but  i can see the line in the map (i can draw it). Please help me. the code
>>> is following:
>>>
>>>
>>>
>>> String
>>> dataSource = "Session:" + sessionid1 + "//" + myLayerName +
>>> ".FeatureSource"; MgResourceIdentifier dataSourceId = new
>>> MgResourceIdentifier(dataSource); MgFeatureService featureSrvc = (
>>> MgFeatureService)siteConnection.CreateService(MgServiceType.FeatureService);
>>> if (DoesLayerExist(myLayerName, map) == false)
>>>
>>> {
>>>
>>>
>>> //create Feature Source MgClassDefinition myClassDef = new
>>> MgClassDefinition();
>>>
>>> myClassDef.SetName(myLayerName);
>>>
>>> myClassDef.SetDescription(myLayerName +
>>> " Feature Source");
>>>
>>> myClassDef.SetDefaultGeometryPropertyName(
>>> "SHPGEOM"); MgDataPropertyDefinition prop = new MgDataPropertyDefinition
>>> ("KEY");
>>>
>>> prop.SetDataType(
>>> MgPropertyType.Int32);
>>>
>>> prop.SetAutoGeneration(
>>> true);
>>>
>>> prop.SetReadOnly(
>>> true);
>>>
>>> myClassDef.GetIdentityProperties().Add(prop);
>>>
>>> myClassDef.GetProperties().Add(prop);
>>>
>>> prop =
>>> new MgDataPropertyDefinition("ID");
>>>
>>> prop.SetDataType(
>>> MgPropertyType.Int32);
>>>
>>> myClassDef.GetProperties().Add(prop);
>>> MgGeometricPropertyDefinition geomProp = new
>>> MgGeometricPropertyDefinition("SHPGEOM");
>>>
>>> geomProp.SetGeometryTypes(
>>> MgFeatureGeometricType.Curve);
>>>
>>> myClassDef.GetProperties().Add(geomProp);
>>> MgFeatureSchema schema = new MgFeatureSchema(myLayerName + "Schema",
>>> myLayerName + "SchemaDesc");
>>>
>>> schema.GetClasses().Add(myClassDef);
>>> MgCreateSdfParams sdfParams = new MgCreateSdfParams("MGA-56 (GDA94 / MGA
>>> zone 56)", map.GetMapSRS(), schema);
>>>
>>> featureSrvc.CreateFeatureSource(dataSourceId, sdfParams);
>>>
>>>
>>>
>>>
>>> //create layer //String layerDef = "Session:" + sessionid1 + "//" +
>>> myLayerName + ".LayerDefinition"; MgResourceIdentifier layerDefId = new
>>> MgResourceIdentifier("Library://essaicalque/Redline.LayerDefinition");
>>>
>>>
>>>
>>>
>>> MgByteSource content = new MgByteSource(@"C:\Program
>>> Files\MapGuideOpenSource\WebServerExtensions\www\essaiselect2\Layerdef.xml");
>>>
>>>
>>> resourceSrvc.SetResource(layerDefId, content.GetReader(),
>>> null); //code enlev‚ d'ici: ajouter layer resource … la carte //il faut
>>> ajouter l'autre code: add layer resource to map //DOMDocument domdoc =
>>> new DOMdocument(); MgLayerresult=add_layer_resource_to_map(layerDefId,resourceSrvc,myLayerName,myLayerName,map);
>>>
>>>
>>> }
>>> MgInsertFeatures insertFeatures = new MgInsertFeatures(myLayerName,
>>> makeLine("1", x0, y0, x1, y1)); MgFeatureCommandCollection commands =
>>> new MgFeatureCommandCollection();
>>>
>>> commands.Add(insertFeatures);
>>> int commandIndex = commands.IndexOf(insertFeatures);
>>> MgPropertyCollection insertResults;
>>>
>>> insertResults = featureSrvc.UpdateFeatures(dataSourceId, commands,
>>> false); MgLayer myLayer1 = map.GetLayers().GetItem(myLayerName) as
>>> MgLayer;
>>>
>>> myLayer1.ForceRefresh();
>>>
>>>
>>> //commands.Add(new MgInsertFeatures(myLayerName,makeLine("1", x0, y0, x1,
>>> y1)));
>>>
>>>
>>>
>>> map.Save(resourceSrvc);
>>>
>>>
>>>
>>> <
>>> script runat=server> Boolean result; MgPropertyCollection makeLine(
>>> String Name, Double x0, Double y0, Double x1, Double y1)
>>>
>>> {
>>> MgPropertyCollection PropertyCollection = new MgPropertyCollection();
>>> MgInt32Property nameProperty = new MgInt32Property("ID", 1);
>>>
>>> PropertyCollection.Add(nameProperty);
>>> MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
>>> MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter(); MgGeometrygeometry = wktReaderWriter.Read("LINESTRING
>>> XY (" + x0 + " " + y0 + "," + x1 + " " + y1 + ")") as MgLineString; //MgGeometry
>>> geometry = wktReaderWriter.Read("LINESTRING(3 4,10 50,20 25)") as
>>> MgLineString; MgByteReader geometryByteReader =
>>> agfReaderWriter.Write(geometry); MgGeometryProperty geometryProperty =
>>> new MgGeometryProperty("SHPGEOM", geometryByteReader);
>>>
>>> PropertyCollection.Add(geometryProperty);
>>> return PropertyCollection;
>>>
>>> }
>>>
>>> Boolean
>>> DoesLayerExist(String LayerName, MgMap Map)
>>>
>>> {
>>> MgLayerCollection layers = Map.GetLayers();
>>>
>>> result = (layers.Contains(myLayerName));
>>> return result;
>>>
>>> }
>>> MgLayer add_layer_resource_to_map(MgResourceIdentifier layerresourceid,
>>> MgResourceService rs, String layername, String layerlegendlabel, MgMapmap)
>>>
>>> {
>>> MgLayer myLayer = new MgLayer(layerresourceid, rs);
>>>
>>> myLayer.SetName(layername);
>>>
>>> myLayer.SetLegendLabel(layerlegendlabel);
>>>
>>> myLayer.SetDisplayInLegend(
>>> true);
>>>
>>> myLayer.SetSelectable(
>>> true);
>>>
>>>
>>> if (!map.GetLayers().Contains(layername))
>>>
>>> {
>>>
>>> map.GetLayers().Insert(0, myLayer);
>>>
>>> }
>>>
>>> myLayer.SetVisible(
>>> true);
>>>
>>> myLayer.ForceRefresh();
>>>
>>> map.Save(resourceSrvc);
>>> return myLayer;
>>>
>>> }
>>>
>>> </
>>> script>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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>>>
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