Latest Contributions by PeterWilson

We are currently still using ArcGIS 10 for our Desktop and Server. We have suddenly come across the following problem and not sure what has changed that can be causing our published Mosaic Datasets to grey out when zoomed into the individual tiles level. We have made sure that the ArcGIS Server SOC and SOM accounts have full access to the directory wherein which we are publishing our Mosaic Datasets. We have also ensured that we are using UNC paths for the Mosaic Dataset. The Mosaic Dataset draws correctly within ArcCatalog, in that the Mosaic displays correctly when zoomed into the individual tiles. As soon as we publish the Mosaic Dataset, the published service will display the overviews but not the individual tiles. Our only work around at this stage is to store the images within the File Geodatabase. The problem is that we can't keep converting our aerial orthophotos into grids as we are losing the compression that they are currently stored in (ECW and MrSID) and will run out of storage space. Any help or advice will be appreciated. Regards ... View more

I've installed ArcGIS 10.2 and realised ArcGIS 10.2 still requires a separate installation of Desktop Background Geoprocessing (64 bit) but I've not been able to find a 10.2 installation of "Desktop Background Geoprocessing (64 bit). Please can someone point me to a location from which to download the following? Regards ... View more

I'm busy writing a script to generate long-sections from a polyline. I've written the following based on an example from an ESRI video. The problem that I have is that the first and last position is not returned. The following works but doesn't return the first and last position along the polyline: >>> pts = [] >>> with arcpy.da.SearchCursor("Hatsamas_Bloukrans_3D_Albers", "SHAPE@")as rows: ...     for row in rows: ...         i = 100 ...         while i < row[0].length: ...             pts.append(row[0].positionAlongLine(i)) ...             i += 100 ... arcpy.CopyFeatures_management(pts, r"in_memory\ptsalongline") I've tried the following but returns an error: >>> pts = [] >>> with arcpy.da.SearchCursor("Hatsamas_Bloukrans_3D_Albers", "SHAPE@") as rows: ...     for row in rows: ...         pts.append(row[0].firstPoint) ...         i = 100 ...         while i < row[0].length: ...             pts.append(row[0].positionAlongLine(i)) ...             i += 100 ...         pts.append(row[0].lastPoint) ... arcpy.CopyFeatures_management(pts, r"in_memory\Ptsalongline") Any help will be appreciated. Regards ... View more

I've developed a model within ModelBuilder that utilizes a large number of tools from various toolboxes as well as python scripts. I'm pretty new to Python as well as Programming. The model that I've developed is calculating the catchment characteristics for very large railway alignments in the excess of 1000 km alignments. If any of the tools within my model fail, it means rerunning the model from scratch. Now most of the errors that I receive is not syntax or incorrect datatypes, it more to do with the particular feature within the Feature Class being processed. I wanted to find out if its possible to execute a tool and if the tool has a problem processing a particular feature within  a feature class will through an exception, report the feature that it has a problem with, but at least will move to the next feature within the feature class and continue processing. I can then going through the feature that are causing the tool to through an exception to see why and run these features separately. Any suggestions will be appreciated. Regards ... View more

I've a very large model where I'm processing 650 watersheds. My model is failing when trying to generate the longest flow paths for the 650 watersheds. I would like to trap the individual watersheds that are causing the longest flow path to fail, report the hydroID and continue the the rest of the watersheds at least. I can always go back to look at the watersheds that throw an exception to see whats causing the the tool to fail. import arcpy, ArcHydroTools watshed = r'E:\Projects\H109355_2\ArcHydro\Model3\Nigeria03.gdb\Layers\Watershed' fdr = r'E:\Projects\H109355_2\Archydro\GRID\layers.gdb\Fdr' ArcHydroTools.LongestFlowpath(watshed,fdr,r'E:\Projects\H109355_2\ArcHyro\Model3\Nigeria03.gdb\Layers\LongestFlowPath') I've tried the following approach, but over write output doesn't work: import arcpy, ArcHydroTools outpath = arcpy.env.workspace = r'E:\Projects\H109355_2\ArcHydro\Model3\Nigeria03.gdb\Layers' arcpy.env.overwriteOutput = True fdr = r'E:\Projects\H109355_2\ArcHydro\GRID\Layers.gdb\Fdr' watshed = "Watershed" with arcpy.da.SearchCursor(watshed,("Name",)) as scur:     for row in scur:         cuindex = row[0]         sqlexp = """{0} = '{1}'""".format(arcpy.AddFieldDelimiters(watshed,"Name"),cuindex)         watshedind = arcpy.FeatureClassToFeatureClass_conversion(watshed,outpath,"watshed",sqlexp)         try:             longflowpath1 = ArcHydroTools.LongestFlowPath(watshedind,fdr,"in_memory\longestflowpath")         except:             arcpy.AddMessage             print cuindex Any help will be appreciated. Regards ... View more

I'm looking for some assistance in error trapping. I have 650 watersheds that I need to calculate the Longest Flow Path for. I have incorporated the tool into a much larger model and currently its failing at Longest Flow Path. I would like to be able run the current tools and for any exception thrown by the tool print the name of the current watershed being processed and continue with the rest. At least then I can go back to see the watersheds that have thrown an exception to see why. Currently I have to manually look for which watershed is causing the error and rerun the tool from scratch. import arcpy, ArcHydroTools watshed = r'E:\Projects\H109355_2\ArcHydro\Model3\Nigeria03.gdb\Layers\Watershed' fdr = r'E:\Projects\H109355_2\Archydro\GRID\layers.gdb\Fdr' ArcHydroTools.LongestFlowpath(watshed,fdr,r'E:\Projects\H109355_2\ArcHyro\Model3\Nigeria03.gdb\Layers\LongestFlowPath') I've tried the following approach, but overwriteoutput isn't working: import arcpy, ArcHydroTools outpath = arcpy.env.workspace = r'E:\Projects\H109355_2\ArcHydro\Model3\Nigeria03.gdb\Layers' arcpy.env.overwriteOutput = True fdr = r'E:\Projects\H109355_2\ArcHydro\GRID\Layers.gdb\Fdr' watshed = "Watershed" with arcpy.da.SearchCursor(watshed,("Name",)) as scur:     for row in scur:         cuindex = row[0]         sqlexp = """{0} = '{1}'""".format(arcpy.AddFieldDelimiters(watshed,"Name"),cuindex)         watshedind = arcpy.FeatureClassToFeatureClass_conversion(watshed,outpath,"watshed",sqlexp)         try:             longflowpath1 = ArcHydroTools.LongestFlowPath(watshedind,fdr,"in_memory\longestflowpath")         except:             arcpy.AddMessage             print cuindex Any help will be appreciated. Regards ... View more

I've never had to connect to an enterprise database (SQL Server 2008) before and please note the database that I'm trying to connect to is not a spatial database. I want to connect to the following database to retrieve records that I can generate spatial data from. The records are of Police incidents that contain coordinates of the location of each incident and the particulars of the incident. I want to use the following information to start analyzing  crime. I've been provided with the IP Address of the SQL Server (2008)  as well as a User Name and Password . When I try to create a database connection from within ArcCatalog I receive the following error message: I've attached a print screen of the database connection parameters that I'm entering as well as the error message. I have asked the Database Administrator to change the compatibility of the particular database that I'm trying to connect to (IMSWarehouse) to level 90 (SQL Server 2005), but I still receive the same error. Any advice in how I can create a direct connection to the following database will be appreciated. Regards NB: I'm currently running ArcGIS 10.1 with SP1 ... View more

I wanted to find out from the rest of the community if they have come across the following. I'm currently testing Arc Hydro 64 bit for ArcGIS 10.1 (version 10.1.3143) and have come across a bug that was around in ArcGIS 10, not sure of the version of Arc Hydro. I run most of my Terrain Preprocessing steps from the Arc Hydro Toolboxes and not from within ArcMap. I'm currently developing a Python Module that will perform all my Terrain Preprocessing steps for me. The bug is this, if you run AdjointCatchment from the ArcHydro Toolboxes it produces an empty feature class although it says it has completed successfully. Only if you run AdjointCatchment from the Arc Hydro Toolbar within ArcMap does it successfully produce a feature class that is populated. Regards ... View more