SharpMap - Open Source Interactive Geospatial Application Framework for the CLR

New Post: RasterLayer

saminsalemi — Sat, 19 Jul 2008 04:50:12 GMT

I Insert GdalRasterLayer To Map In Version 1.1 Of SharpMap.But This GdalRasterLayer Change To Back&White Image.I Want To Show This GdalRasterLayer With Color.How Can I Do It???

New Post: Custom Rendering Styles with external variable

cblackburn — Fri, 18 Jul 2008 14:42:19 GMT

Turns our you need the latest v1.1 to get GeometryFeatureProvider so that's now sorted.

Next problem is that the theme throws an exception because some of the line points do not have data associated with them. Does this mean I need to interpolate the value across all the line points before it will work?

Thanks

Chris

New Post: Problem with .rik file

magmic — Fri, 18 Jul 2008 14:19:53 GMT

Hi

When I load a .rik file everything is ok accept from the color. The map appears in grayscale. Anyone knows why? I am using Dans patch.
Thanks alot for the help!

/Maggie

New Post: Custom Rendering Styles with external variable

cblackburn — Fri, 18 Jul 2008 14:01:22 GMT

Hi John,

I have come up against an interesting problem. SharpMap.Data.Providers.GeometryProvider does not support feature information and as far as I can see the class GeometryFeatureProvider does not exist

What should I do?

Chris

New Post: Custom Rendering Styles with external variable

JohnDiss — Fri, 18 Jul 2008 10:22:36 GMT

Thats right, you initially populate the dataset, from which you retrieve the datatable to use in your GeometryFeatureProvider. Good luck jd

New Post: Custom Rendering Styles with external variable

cblackburn — Fri, 18 Jul 2008 09:41:44 GMT

Ok, I think I have it, I need to convert the FeatureData*Table* not FeatureData*Set*. :).

New Post: Custom Rendering Styles with external variable

cblackburn — Fri, 18 Jul 2008 09:26:21 GMT

Hi John,

I have created this, as you suggested, but am stuck at how to add this to a layer. I.e. How do I convert a SharpMap.Data.FeatureDataSet into something I can pass to SharpMap.Layers.VactorLayer.DataSource?

Thanks

Chris

New Post: How to write save method a layer as .shp file

vtson — Fri, 18 Jul 2008 03:55:37 GMT

I see a lot of discussions, but i don't know to write save method a layer as .shp file. Help me.
Thanks.

New Post: "Vertex components can't be NaN." Exception

JohnDiss — Thu, 17 Jul 2008 20:53:06 GMT

Hi dcb, this one is slightly counter-intuitive, try adding a layer to the map before assigning the map to the view. (In case you are wondering the error is due to the map extents having NaN as the ordinates of each vertex) hth jd

New Post: "Vertex components can't be NaN." Exception

dcb — Thu, 17 Jul 2008 20:25:27 GMT

Hi

I am getting a "Vertex components can't be NaN." exception thrown inside getVertexInternal (BufferedCoordinate2DFactory.cs) My call stack is below

I have been unable to locate the problem. Does anyone know what the problem may be??

Thanks

     ManagedBufferedCoordinate2D.dll!NetTopologySuite.Coordinates.BufferedCoordinate2DFactory.getVertexInternal(double x = NaN, double y = NaN, double w = 1.0) Line 621    C#
     ManagedBufferedCoordinate2D.dll!NetTopologySuite.Coordinates.BufferedCoordinate2DFactory.getVertexInternal(double x = NaN, double y = NaN) Line 614 + 0x24 bytes    C#
     ManagedBufferedCoordinate2D.dll!NetTopologySuite.Coordinates.BufferedCoordinate2DFactory.Create(double x = NaN, double y = NaN) Line 78 + 0x1d bytes    C#
     ManagedBufferedCoordinate2D.dll!NetTopologySuite.Coordinates.BufferedCoordinate2DFactory.GeoAPI.Coordinates.ICoordinateFactory.Create(double x = NaN, double y = NaN) Line 192 + 0x1d bytes    C#
     SharpMap.dll!SharpMap.Presentation.Presenters.MapPresenter2D.getGeoCenter() Line 1307 + 0x87 bytes    C#
     SharpMap.dll!SharpMap.Presentation.Presenters.MapPresenter2D.handleViewSizeChanged(object sender = {SharpMap.Presentation.WinForms.MapViewControl}, System.EventArgs e = {System.EventArgs}) Line 1049 + 0x1d bytes    C#
>    SharpMap.Presentation.WinForms.dll!SharpMap.Presentation.WinForms.MapViewControl.OnSizeChanged(System.EventArgs args = {System.EventArgs}) Line 838 + 0xd bytes    C#

New Post: Custom Rendering Styles with external variable

JohnDiss — Thu, 17 Jul 2008 14:10:21 GMT

Hi Chris, It would definately work, my tactic would be:
first create a FeatureDataSet
Pass it into your shapefile providers ExecuteIntersectionQuery method,
dig your table back out of the dataset
add your new columns to it
loop through adding your derived data
hth jd

New Post: Developer Meetings?

JohnDiss — Thu, 17 Jul 2008 14:05:49 GMT

Hi Andrew, a lot of us are on irc a lot of the time.. so sometimes we run out of things to say :) also the summertime/GMT/UMT thing can cause a range of 8 o-clocks. Pop along and start a topic and everyone will join in. see you there.. jd

New Post: Rotating the map

JohnDiss — Thu, 17 Jul 2008 14:02:32 GMT

Hi chaps, I haven't used either but I think:
in 0.9 you would use the Map.MapTransform
in 2 you would use IRenderer.RenderTransform

hth jd

New Post: Rotating the map

uridato — Thu, 17 Jul 2008 13:11:54 GMT

well in the 0.9 I think i found a solution, but i had not implemented it yet.
My idea was to wrap the rendering call in the map class this way:
1. change the bounding box of the map to one that contains the desired area
-> if you want to view rectangle with top-left point (x,y) and size (w,h) rotated in angle a then the bounding box should be:
top left point is (x-h*cos(a), y) size is ( h*cos(a)+w*sin(a), h*sin(a)+w*cos(a) )
2. set the graphics object to rotate-transform to angle a (counter clock wise -I think)
3. get the image of the map with the new bounding box.
4. I'm not sure, but you might need to clip the image at this point

anyway I didn't implement this yet so I don't know if it works.
I also don't know i this was solved some way in 2.0

New Post: Custom Rendering Styles with external variable

cblackburn — Thu, 17 Jul 2008 11:56:20 GMT

Right,

I have thought about this and I have decided to go down the route of a custom FeatureDataTable but, probably because of my unfamiliarity with the framework, I seem to be going round in circles.

But, as they say, the first stage in obtaining a solution is defining the problem so this is what I'm trying to do.

I have a shapefile which contains a polyline of many points. I also have a database, of some form, containing points on the line and a variable value, e.g. altitude for arguments sake. What is the best way to overlay this information as false color with interpolation between data points?

My instinct, based on what I know so far, is to load the shapefile into a FeatureDataTable myself. Then insert the data as extra points on the line containing the variable and then use some sort of custom RenderStyle. Am I on the right track?

Thanks

Chris

New Post: Developer Meetings?

Edmund0Dantes — Thu, 17 Jul 2008 11:18:20 GMT

Hi All,

I noticed on the front page that there are developer metting on wednesday nights, do these still happen?. I popped along to the IRC channel last night but there didn;t seem to be a lot of activity (but there were people in the channel)- but i've not tried accessing IRC via PIGIN before.

Andrew

New Post: Need help - map control hangs in Sharp Map Ajax Demo

gmork6 — Thu, 17 Jul 2008 09:25:26 GMT

Hello! I'm new to SharpMap and I need help. I have downloaded the demo files and tested it a little. I noticed that after I zoom in with mouse scroller, and then zoom out quickly, the map control hangs - mouse pointer is in "wait" status , zooming in /out is impossible. Same thing happens when I zoom out twice after the page has loaded (Ajax.aspx from Demo). After refreshing the page everything goes back to normal. What can cause this? How to fix it?

Thanks in advance.

New Post: Rotating the map

VansFannel — Thu, 17 Jul 2008 08:12:20 GMT

I have the same question:

Can I rotate the map giving an angle in SharpMap 2.0?

Thank you!

New Post: Go different page by click different polygon

cdqrain — Thu, 17 Jul 2008 06:33:26 GMT

hi neoo.
yes, generate map first. then do click on map to get attribute data.
:0

New Post: MapViewControl

dcb — Wed, 16 Jul 2008 10:03:37 GMT

Thanks John, that worked :)

JohnDiss wrote:
Hi dcb, on my vs i have a toolbox section named SharpMap.Presentation.WinForms, you may need to build the solution, close it and reopen for vs to catch up. Alternatively you can right click on the toolbox, select 'choose items', click the browse button and navigate to SharpMap.Presentation.WinForms.dll, make sure that MapViewControl is checked and hit OK.. (I am not sure if this will track the latest compiled version though..) hth jd