Latest Contributions by DuncanHornby

Mark, Whilst us developers welcome your shared code (its always good to see how others do things) this is not the place to share code. You want to be uploading it to the code gallery along with any supporting documentation\metadata. Duncan ... View more

kreuzrsk, sounds like you are describing the modification of an existing FeatureClass? If so then the creation date would (obviously) never change. The modification date would and you tick that on in the standards column panel in the ArcCatalog Options. ... View more

I agree it would be great if ArcCatalog natively displayed date created. It would make for much easier data management. But then again that is what metadata is all about.... If you create your dataset with a standard geoprocessing tool (e.g. Create Featureclass) then the creation date is inserted into the metadata. This can be displayed in ArcCatalog by adding it to the list of metadata items you wish to be displayed in ArcCatalog. Now you are going to tell me you've never gone into the ArcCatalog Options.... 😉 Well its in Customize > ArcCatalog Options > Contents Click on the Add button under the metadata section. Set Caption to Date created and property to Esri/CreaDate, width to about 15. Click OK and make sure its ticked on. Et voila!  You have a creation date displayed next to your dataset, OK its not a nice format but it is the date. Ideally Esri should be showing this as default. ... View more

Tai, Looks like you are building an Engine based application. I have personally not done that, but look here, have a look at the onCreate method. Duncan ... View more

Are you wanting to call an existing desktop button? If so, there is the Zoom to selected elements which is found under the Edit menu. You could call this? Have a look at this page and look for esriArcMapUI.ZoomToSelectedGraphicsCommand. ... View more

I agree there should be some easier way of adding new TextElements but you can "add" new elements by cloning them. This relies on a text element existing in the layout which you clone from. Its a bit of a fudgeso it would much nicer to see some sort of method that allows you to add elements. # Create a clone of all text elements and set the text to FRED mxd = arcpy.mapping.MapDocument("CURRENT") for elm in arcpy.mapping.ListLayoutElements(mxd, "TEXT_ELEMENT"):   x = elm.clone()   x.text = "FRED" ... View more

There is a more efficient Strahler ordering algorithm created by Gleyzer et al 2004 which is implemented in an ESRI 10.1 AddIn tool called RivEX, worth a look? ... View more

Martin, What is intersecting the river network? In a river network the intersections are the nodes of the polylines, it would not be a network if this was not the case? So are you attempting to intersect the rivers with another layer (e.g. a road network)?  If you ran the intersect tool with say a road and river dataset you get the intersection points. If you are using ArcInfo(Advance) then you could use the Split Line at Point tool. What ever you do, using the off the shelf geo-processing tools will result in a new a FeatureClass of split polylines. Duncan ... View more

SelectLayerByLocation works with FeatureLayers, your code is referencing an in-memory FeatureClass. You need to create a FeatureLayer for this before you call SelectLayerByLocation arcpy.MakeFeatureLayer_management('in_memory\\mergedStreetsPolygons',"StreetPolygonFeatureLayer") arcpy.SelectLayerByLocation_management("StreetPolygonFeatureLayer", "COMPLETELY_WITHIN", 'in_memory\\mtdbStreetBuffer.lyr', "", "NEW_SELECTION") ... View more

Are they actually being cut? You can test this just by looking at the area of the buffer polygon. If they are the same then it would suggest you have a clipping extent set on the DataFrame. If they are genuinely being cut this would suggest an extent has been set on the tools environment settings, or the applications environment settings or the the model environment settings. ... View more

Alexander, Just an idea but have you tried calling the Copy geo-processing tool to copy the workspace? Duncan ... View more

If you place the AddIn in a folder that all users can reach (e.g. a sub-folder in the ArcGIS folder) then all users can log in under their own profile and navigate to it. If it is on a network drive then all users could navigate to it from any computer with ArcGIS... ... View more

John, I have not used this interface so it may be a red herring but take a look at the IConversionNotation interface? Duncan ... View more

Mickey, I don't believe there is a method or property that returns the answer to "does this layer belong to a group layer, if so which". You would need to create a recursive procedure that searches the layers and traverse down the tree of layers testing the type of layers you are finding. Below is a bit of VBA that shows you how to test the type of layer found. You need to create a recursive procedure around this logic. Public Sub test()        Dim pMXDocument As IMxDocument     Set pMXDocument = ThisDocument     Dim pMap As IMap     Set pMap = pMXDocument.FocusMap     Dim pEnumLayer As IEnumLayer     Set pEnumLayer = pMap.Layers(Nothing, True)     Dim pLayer As ILayer     Set pLayer = pEnumLayer.Next     Do While Not pLayer Is Nothing         If TypeOf pLayer Is IGroupLayerayer Then             Debug.Print "GroupLayerayer = " & pLayer.Name             ' Do a recursive search here         ElseIf TypeOf pLayer Is IGeoFeatureLayer Then             Debug.Print "FeatureLayer = " & pLayer.Name         End If         Set pLayer = pEnumLayer.Next     Loop End Sub Duncan ... View more

You say you are making a stand alone application, I assume you are using Engine? I looked at the help for the IMaps interface and in the remarks it says: ... IMaps interface is NOT available with ArcGIS for Server and ArcGIS Engine since this interface is used to get access to a Maps object, which is a non-creatable object. References to non-creatable objects must be obtained through other objects. IMaps interface is available only with ArcGIS for Desktop. Your code is accessing an MXDocument class? Have you considered using a MapDocument object instead? Look a the help page "Working with map documents" there is a section about why you would use a MapDocument class instead of an MXDocument Class. Worth a read? Duncan ... View more