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New Post: Legendheader text of layer wont appear in legend

Joska — Sat, 25 May 2013 02:55:58 GMT

I have a working programm which converts access input to layers.... here is part of the code...
My problem is that in the second part, a function where i make the legend... the layername doesnt show in the legend....

__pPointSym.LegendText = "Onderzoeksgebied"__

although the categories-symbology appear in the right way in the legend the name does not
and i think as a cause by it i cant select the layer either....

so the question is, what am i missing?

            Dim Layer As IMapLayer = Form1.myVenster.Layers.Add(fsAdres)
            Dim pPointMapLayer As IMapFeatureLayer
            If Layer IsNot Nothing Then
                If Layer.ProjectionString Is Nothing Then
                    Layer.Projection = DefineProjection()
                End If
                fsAdres = TryCast(Layer.DataSet, IFeatureSet)
                pPointMapLayer = TryCast(Layer, IMapFeatureLayer)
                pPointMapLayer.Symbology = SetSwungOnderzoeksgebieden(fsAdres)
                Return
                fsAdres = Nothing
            Else
                Return
            End If

    Public Function SetSwungOnderzoeksgebieden(ByVal pfs As IFeatureSet) As IFeatureScheme
        Dim pPointSym As IPointSymbolizer = New PointSymbolizer
        Dim pScheme As IFeatureScheme
        Dim category1 As IPointCategory = New PointCategory(System.Drawing.Color.DarkRed, DotSpatial.Symbology.PointShape.Rectangle, 6.0)
        Dim category2 As IPointCategory = New PointCategory(System.Drawing.Color.LightGreen, DotSpatial.Symbology.PointShape.Rectangle, 8.0)
           Try
            pScheme = New PointScheme()
            pPointSym.LegendText = "Onderzoeksgebied"
            category1.FilterExpression = "[BinnenOnderzoeksgebied] = false"
            category1.LegendText = "Buiten onderzoeksgebied"
            category2.FilterExpression = "[BinnenOnderzoeksgebied] = true"
            category2.LegendText = "Binnen onderzoeksgebied"
            pScheme.AddCategory(category1)
            pScheme.AddCategory(category2)
            Return pScheme
        Catch ex As Exception
            MsgBox(ex.ToString, MsgBoxStyle.Critical, "Fout in SetSwungOnderzoeksgebieden")
            Return Nothing
        End Try
    End Function

New Post: how to centre mapwindow around a certain coordinate?

Joska — Sat, 25 May 2013 02:31:51 GMT

AND HERE is the solution

                Dim XRekenpunt As Object = dtSwungRekenpunt.Rows.Item(0).Item("X")
                Dim YRekenpunt As Object = dtSwungRekenpunt.Rows.Item(0).Item("Y")
                myVenster.ViewExtents.MinX = XRekenpunt - 20
                myVenster.ViewExtents.MaxX = XRekenpunt + 20
                myVenster.ViewExtents.MinY = YRekenpunt - 20 * (myVenster.Size.Height / myVenster.Size.Width)
                myVenster.ViewExtents.MaxY = YRekenpunt + 20 * (myVenster.Size.Height / myVenster.Size.Width)
                myVenster.Refresh()

New Post: Zonal Statistics

mese79 — Fri, 24 May 2013 07:23:04 GMT

According to the documentations Xllcenter and Yllcenter must be the center of 1st cell coord in grid which is bottom-left cell.
But as i said, i found:
Xllcenter = Raster.Extent.MinX + Raster.CellWidth (should be Raster.Extent.MinX + Raster.CellWidth / 2) and
Yllcenter = Raster.Extent.MinY (should be Yllcenter = Raster.Extent.MinY + Raster.CellHeight / 2)
I think this is a bug.

New Post: how to centre mapwindow around a certain coordinate?

Joska — Fri, 24 May 2013 04:56:29 GMT

I have a working application which primarly now converts database data to shapes and projects them in the dutch coordinate system on the mapwindow.

Now i made a button which looks up a certain ID-point in de database and I would like to jump to this point on the mapwindow where this point is in the centre....

Below u see the part of the code where here

            Dim XRekenpunt As Object = dtSwungRekenpunt.Rows.Item(0).Item("X")
            Dim YRekenpunt As Object = dtSwungRekenpunt.Rows.Item(0).Item("Y")

I succesfully managed to retrieve the coordinates.... so how to centre the window on this point...? Can anyone give me ideas?

Thx Joska

    Private Sub btnZoekMachine_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnZoekMachine.Click
        Dim strPadFile As String
        Dim ZoekRekenpunt As Long

        strPadFile = ""
        Try
            If DMC_DatabaseType = "SWUNG" Then
                strPadFile = lblPadFileSwung.Text
            ElseIf DMC_DatabaseType = "BOOGIE" Then
                strPadFile = lblPadFileBoogie.Text
            End If
            ZoekRekenpunt = Val(txtRekenpunt.Text)
            '--------------------------------------------------------------------------------------------
            'ZOEK DE SWUNG REKENPUNT in de database
            If DMC_DatabaseType = "SWUNG" And rbtZoekrekenpunt.Checked = True Then
                'Maak een nieuwe datatabel voor eventueel gevonden rekenpunten
                Dim dtSwungRekenpunt As New DataTable()
                'Maak een connectie met de database en vul de tabel
                Dim conSwungDatabase As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & strPadFile & ";Persist Security Info=False;User Id=admin;Password=;")
                conSwungDatabase.Open()
                Using cmd As New System.Data.OleDb.OleDbCommand()
                    cmd.Connection = conSwungDatabase
                    cmd.CommandText = "SELECT tblWaarneempunten.ID, tblWaarneempunten.X, tblWaarneempunten.Y " _
                    & "FROM tblWaarneempunten " _
                    & "WHERE (((tblWaarneempunten.ID)= " & ZoekRekenpunt & "));"
                    Dim rdrR As System.Data.OleDb.OleDbDataReader = cmd.ExecuteReader()
                    dtSwungRekenpunt.Load(rdrR)
                End Using
                'Sluit de connectie
                conSwungDatabase.Close()
                Dim XRekenpunt As Object = dtSwungRekenpunt.Rows.Item(0).Item("X")
                Dim YRekenpunt As Object = dtSwungRekenpunt.Rows.Item(0).Item("Y")

              SO WHAT MUST GET HERE TO MAKE THE WINDOW CENTRE AROUND THIS POINT POSSIBLE?

            End If

        Catch ex As Exception
            MsgBox(ex.ToString, MsgBoxStyle.Critical, "Fout in btnZoekMachine_Click")
            Return
        End Try
    End Sub

New Post: Problem when loading other .dll from my plugin dll

vatavian — Thu, 23 May 2013 17:27:42 GMT

atcUtility depends on MapWinUtility.dll, so be sure to get the version of MapWinUtility.dll that was in the same package with it.
If this is the version from BASINS, then it is compiled for x86 and .Net 3.5. If it is from D4EM, then it is compiled for x86 and .Net 4.0.

New Post: Dotspatial.Plugins.MapwindowProjectFileCompatibility

Luffy16 — Thu, 23 May 2013 08:40:31 GMT

I think it will be very difficult, beacause when I wrote the code below :

OpenProjectMwprj mwprjOpener = new OpenProjectMwprj();
mwprjOpener.App = appManager1;

            try
            {
               mwprjOpener.Open(ProjectName);
            }
            catch (IOException exIO)
            {
                MessageBox.Show(this, "Could not open the specified map file " + ProjectName + Environment.NewLine + Environment.NewLine + exIO.Message, "Error",
                                MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

I always got this error : RuntimeBinderException: Cannot apply indexing with [] to an expression of type 'DotSpatial.Plugins.MapWindowProjectFileCompatibility.DynamicXMLNode'

Which I didn't find the solution .

Anyway Thanks for your explanation vatavian.

New Post: Zonal Statistics

Oscarafone77 — Thu, 23 May 2013 08:27:20 GMT

ops... yes you are right! sorry for the wrong info,

So you are basically saying that the xllcenter and yllcenter are pointing to the bottom right corner of cell (0,0)?

Oscar

New Post: Dotspatial.Plugins.MapwindowProjectFileCompatibility

vatavian — Wed, 22 May 2013 21:38:44 GMT

Dotspatial.Plugins.MapwindowProjectFileCompatibility was created based on an earlier version of MapWindow 4. The MapWindow 4 project file has evolved in a non-backward-compatible way since then. It should be possible for someone to update MapwindowProjectFileCompatibility to also be able to read newer project files, but it would take some effort.

New Post: Dotspatial.Plugins.MapwindowProjectFileCompatibility

Luffy16 — Wed, 22 May 2013 19:35:38 GMT

Hi everybody.

I have built a GIS application using Dotspatial. I am able to open Dotspatial projects (*.dspx),Images maps, PDF maps, but I can't open a mapwindow project. I tried to use the plugin Dotspatial.Plugins.MapwindowProjectFileCompatibility to open the mapwindow project but I failed.

Is there any possibility to do it please ?

New Post: Saving points, lines or polygons with project and reload them

Luffy16 — Wed, 22 May 2013 10:04:47 GMT

Hi

When I draw a point on a layer, I save the project for example (test1.dspx), but when I want to open it again , either I can't find the points which I drew or the project does not want to open
can you help me please to solve this

New Post: Zonal Statistics

mese79 — Mon, 20 May 2013 16:50:29 GMT

Well actually it is bottom-left cell!
I figure out my problem. in raster grid first cell is bottom-left one so value[0,0] contains value for that cell.
But i think i found a bug:
the Xllcenter and Yllcenter supposed to be center of first cell coordinate, but i found Xllcenter equal to Raster.Extent.MinX + Raster.CellWidth and Yllcenter equal to Raster.Extent.MinY.
Isn't this a bug?

New Post: Zonal Statistics

Oscarafone77 — Mon, 20 May 2013 12:58:08 GMT

I think it is the top-left cell

Oscar

New Post: Zonal Statistics

mese79 — Sat, 18 May 2013 19:07:05 GMT

Ok, i think i found the problem but i'm confused.
The Y axis of the map increases upward (just opposite of computer graphic). right?
If so in raster grid the raster.Value[0,0] refers to which cell coordinate? the top-left cell or bottom-left one?
Thanks.

New Post: Zonal Statistics

mese79 — Sat, 18 May 2013 09:39:27 GMT

Hi
I have a raster grid and a polygon layer. I want to calculate Mean value for each polygon from the raster grid.
Simply i create a loop through each raster cell and check if polygon intersect that cell. if so add cell value to sum and finally calculate mean by sum/cells in polygon.
But i think there is something wrong, because the results i get by this way is much different from result of ArcGIS 'Zonal Statistics' method. also DS clip raster by polygon gives me a new raster which has statistics very close to ArcGIS.
So is there problem with polygon.intersects? or my implementation is wrong?

...
var cell = new Point(raster.Xllcenter + (raster.CellWidth*col), raster.Yllcenter + raster.CellHeight*row));
if (polygon.Intersects(cell))
{
    count++;
    sum += raster.Value[row, col];
}

New Post: Problem when loading other .dll from my plugin dll

carosoisu — Fri, 17 May 2013 20:39:01 GMT

Try to check the platform target of your project. It has to be the same of your arcUtility.dll..

New Post: Problem when loading other .dll from my plugin dll

kuaifang — Fri, 17 May 2013 19:50:38 GMT

By the way I am writing plugin for Hydrodesktop... Cause my Mapwindow 4 can not load the plugin dll I have wrote. Are there anyone have this problem before?

Thank you very much!

New Post: Problem when loading other .dll from my plugin dll

kuaifang — Fri, 17 May 2013 19:07:52 GMT

Hi all,

I have a problem when loading other .dll from my plugin dll.

Here is the thing. I am writing a plugin dll in dotspatial for mapwindow. It works fine. But when I try to use other's dll ( for example I am trying to use atcUtility.dll ) in my own plugin, it shows in mapwindow that :

System.IO.FileNotFoundException: Could not load file or assembly 'atcUtility, Version=3.1.2.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'atcUtility, Version=3.1.2.0, Culture=neutral,

And I can see that dll is just inside CUAHSI HIS\HydroDesktop 1.5.12\Plugins but can not be find. Are there anyone have the same problem before..?

Thank you very much!

New Post: Creating Label using FeatureSet

vzavec — Thu, 16 May 2013 12:03:35 GMT

I create so called "spatialite" layer too and there is no chance to do "Label Setup" from legend or to do "Export Data All features" too (shape file from this action is corrupted).

I am very interested for help on this.

regards, Vojko

New Post: Creating Label using FeatureSet

psarun_cpl — Thu, 16 May 2013 10:22:00 GMT

Hi All,

Using shapefiles labeling works like a charm using the following

 IFeatureLayer CountriesLayer = (IFeatureLayer)WebMap1.AddLayer(BasePath + @"\United States states 2011_AREAS.SHP");
            PolygonSymbolizer SymbCountries = new PolygonSymbolizer(Color.FromArgb(0, 191, 0));
            SymbCountries.SetFillColor(Color.Transparent);
            SymbCountries.OutlineSymbolizer = new LineSymbolizer(Color.Magenta, 1);
            SymbCountries.ScaleMode = ScaleMode.Simple;
            CountriesLayer.Symbolizer = SymbCountries;

            MapLabelLayer  thislabelLayer = new MapLabelLayer();
            CountriesLayer.LabelLayer = thislabelLayer;
            CountriesLayer.ShowLabels = true;

            WebMap1.MapViewExtents = CountriesLayer.Extent;



            thislabelLayer.Symbology.Categories[0].Expression = "[" + CountriesLayer.DataSet.DataTable.Columns[2].ColumnName+"]";
            thislabelLayer.Symbolizer.ScaleMode = ScaleMode.Simple;
            thislabelLayer.Symbolizer.Orientation = ContentAlignment.TopCenter;
            thislabelLayer.Symbolizer.LabelPlacementMethod = LabelPlacementMethod.Centroid;
            thislabelLayer.Symbolizer.PartsLabelingMethod = PartLabelingMethod.LabelLargestPart;
            thislabelLayer.Symbolizer.FontSize =7.0F;

Now when I create a featureset using the following code.

http://science.nature.nps.gov/im/units/ARCN/data_management/DotSpatialCodeExamples/index.htm?CreateFeatureSetfromaSQLServerqu.html

Can anyone help me how to display this featureset on the maps and label them?

Regards
psarun

New Post: Loading Map

SJY — Wed, 15 May 2013 09:22:53 GMT

My objective is to load a map and placed different items on the map , the map has to be continuously refreshed.
I have followed the instuctions at : http://screencast.com/t/htiyqvLh

The above instructions involve dragging and dropping the different control objects on a form.

Could anyone show me the tutorials on how to code the map and refresh the map.