Latest Contributions by DuncanHornby

Jeff, Sounds like the source of your problem could be a spatial alignment issue? You say your grids are the same extents but are they different coordinate systems? If not reproject the grid that is different so they are all the same. Also set SnapRaster environment setting to your master grid. Duncan ... View more

Compacting a Personal geoDatabase can reset as discussed here. Maybe you could export the table or have some code trigger at an appropriate value and direct the data to a new table? ... View more

David, I'm not really a raster "guru" so maybe giving you bad advice but for the record I've just tested this scenario. I created 4 constant value rasters first was 1, second was 2, third was NODATA and fourth was 3. I used the Composite Bands tool to combine them and it created a 4 band raster where the 3 band was just NODATA values, so it can be done. I just don't know what implications this would have on display or processing? Duncan ... View more

Daniel, Looking at your picture I can see that your dataset is in decimal degrees. ArcMap is assuming that your event data is also in decimal degrees hence the large offset. You either need to convert your distances in Excel into decimal degrees or reproject your spatial dataset into a coordinate system that has meter units (typically your national grid or UTM). Duncan ... View more

The attribute table of a integer raster normally has a value field (the pixel value) and a count field (the number of pixels in the raster with that value). So to see the words "open water/open space" you must have joined another table to it. The other table must have 2 fields in it: one for the pixel value and another the descriptive text (in your case a land class). So at some point you have joined this table and I guess you need to find that table or recreate it? Duncan ... View more

Daniel, Below is a screen shot of a single event offset to the right in ArcGIS 10.1. If you negate the offset figure it will draw on the left. Duncan ... View more

Jim's solution is good but it does not work with all data formats (i.e. Shapefiles) see this thread. Maybe try something like this: pQueryFilterDefinition.PostfixClause = "ORDER BY Town" using IQueryFilterDefinition2 interface. ... View more

Xavier, It might help people if you upload a before and after image of what you are attempting? ... View more

I'm not aware of any ability to lock a layer internally to stop a user from editing the properties of a Layer. ... View more

I like this idea I can see myself using such functionality. The problem is how do you define "empty"? If there was a string field in a GeoDatabase you could have <Null> entries or they could all be set as "". But <Null> is not supported in Shapefiles. What about other storage formats? A numeric field field in a shapefile must have a number, add a new numeric field to a shapefile and they are all set to zero. But what if you are using zero as a meaningful value say in a binary flag field? I like the idea of dropping "empty" fields but more thought needs to go into defining what empty means. ... View more

Oyle, I'm just thinking off the top of my head here. You have a DTM and 2 points, your FROM point and your TO point both at the same elevation. You could do this: Create a FeatureClass containing a single polyline created by you connecting the 2 points Call the Polyline to Raster GeoProcessing tool to create a raster where your line is 1 and background is nodata Call the Extract by Mask  and extract out the elevation pixels under your mask Run the Extract by attribute geoprocessing tool extracting pixels >= your FROM point elevation. Optionally convert the raster back into polylines if required. If you used the geo processing tool Points To Line you could actually achieve all this is modelbuilder in a matter of minutes without the need to write any code... ... View more

Li, If you are looking to return the distance between geometries then have a look at the IProximityOperator Interface. ... View more

I agree it would be very useful for ArcCatalog to report what version an mxd is. This could be in the properties or a mandatory field in the metadata. There are many users still using older versions of ArcGIS which need to be supported. But this idea will only help people in the future as ESRI won't be going back to 9.1 and adding new functionality. ... View more

I know this is 3 years too late 😄 but I was just trying to do the same thing in VB .net. Anyway here is my code developed in VB .net for ArcGIS 10.1 hope it helps others. Duncan Sub ReloadTableCache(ByRef pTable As ITable)    ' QI to IDataset so we can get Table name    Dim pDataset As IDataset    pDataset = DirectCast(pTable, IDataset)    ' Get a handle on open tables    Dim pTableWindow As ITableWindow3    pTableWindow = New TableWindowClass    Dim pSet As ISet = Nothing    pTableWindow.FindOpenTableWindows(pSet)    If pSet Is Nothing Then Exit Sub ' No tables open, bail out    ' Search open tables and reload cache if table if found    pSet.Reset()    Dim pStandaloneTable As IStandaloneTable    Dim pTW As ITableWindow3    pTW = DirectCast(pSet.Next, ITableWindow3)    Do While Not pTW Is Nothing        pStandaloneTable = pTW.StandaloneTable        If pStandaloneTable.Name = pDataset.Name Then            ' Matching table found, reload cache            Dim pTableControl As ITableControl            pTableControl = pTW.TableControl            pTableControl.RemoveAndReloadCache()            Exit Do        End If        pTW = DirectCast(pSet.Next, ITableWindow3)    Loop End Sub ... View more

I'm guessing that you need a forward slash between your database path and the feature-class name? ... View more