[mapguide-users] help
saloua wakrim
wakrimsaloua.wakrim at gmail.com
Mon May 25 11:09:43 EDT 2009
i resolved coordinates point prob and transparency layer, now i want
identify polygone wich i draw on map by user clic, i use GetSelectionXml()
when user select polygone, this function gives me:
<?xml version="1.0" encoding="UTF-8"?><FeatureSet><Layer
id="d610b562-ffff-ffff-8002-0016356155d0"><Class
id="BufferLayerSchema:BufferClass"><ID>GQAAAA==</ID></Class></Layer></FeatureSet>
i want understand how can i identify polygone (id polygone) by this
description i think that i must use
<ID>GQAAAA==</ID> cause i've remarked that all what it changes when i select
another polygone, but i don't see the relation with <ID>GQAAAA==</ID> end
the ID wich i associate to my polygone when i create it.there is any
relation?? thanks a lot on advance.
2009/5/20 Kenneth Skovhede, GEOGRAF A/S <ks at geograf.dk>
> UNIT is the coordinate system unit, eg. degrees, meters or inches.
>
> If the layers and map have the correct coordinate systems assigned,
> MapGuide will automatically convert the data to display correctly,
> so you get the correct map.
>
> You do not have to work with the projection string manually.
> Beware of trying to calculate coordinates manually based on the UNIT,
> because
> projections are not always compatible just because the use the same UNIT.
> Instead, use the MgCoordinateSystem classes to convert points from one
> projection to another.
>
> Regards, Kenneth Skovhede, GEOGRAF A/S
>
>
>
> saloua wakrim skrev:
>
> 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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>>>>
>>>>
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>>>>
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