Latest Contributions by GeraldineEGGERMONT

At least add an option to choose a pop-up with a longer leader, so that the pop-up doesn't hide the feature as much. ... View more

Which tool are you using? Export to CAD takes a list of feature classes as input and outputs a single CAD file. ... View more

Hi Rana, You can use this code to remove empty group layers: # Remove empty group layers ListLyr = arcpy.mapping.ListLayers(df) if ListLyr:     for lyr in ListLyr:         count = 0         if lyr.isGroupLayer:             for sublyr in lyr:                 count = count + 1             if count == 0:                 arcpy.mapping.RemoveLayer(df, lyr)                 arcpy.AddMessage("Removed layer " + lyr.name) mxd.save() Geraldine ... View more

Hello Karin, This post might help you. If your field names are in a table, you should use the Row Selection instead of the Multivalue iterator. Geraldine ... View more

Hi, I'm not sure I understand your question, but try this: - convert your polygon feature class to a raster using Feature to Raster - Use this raster as a zone raster in the Zonal Statistics tool, with "MEAN" as statistics type. Does this help? Geraldine ... View more

Hello Michelle, You should first prepare your census and address feature classes (this can be done without Python): Remove water bodies from census with Erase Add a field representing the radius of the buffer to census, and calculate it based on the population density field Join the radius field to the address fc with a Spatial Join. Then create your SearchCursor like this: addresses = r"c:\data.gdb\addresses" census = r"c:\data.gdb\census" fields = ["ADDRESS_ID", "RADIUS"] with arcpy.da.SearchCursor(addresses, fields) as cursor:     for row in cursor: then for each row (= each point): Create an variable containing the ADDRESS_ID (ID = row[0]), i.e. the first field in your cursor, i.e. ADDRESS_ID) Buffer the point using radius as distance Select the underlying census polygon using Make Feature Layer + Select by Location Clip the buffer with the selected census polygon. The output is going to be the constraining feature class for the Create Random Points tool Create a random point in this zone with Create Random Points Add an ID field to the random point (same format as your ADDRESS_ID field from the address fc) Calculate the field, assign it the ID variable Clear the census selection. You could either append each point to an empty point feature class you create before starting the cursor, or merge all points together when the cursor is done. In order to make your script run faster, you should use whenever possible geometry objects instead of feature classes as inputs and outputs of the tool. If you want to start learning Python, there is a free tutorial (3 hours) here. There are other trainings (not always free) and plenty of examples in the Online Help. Converting a ModelBuilder to a Python script sometimes help figuring out the correct syntax. Good luck and don't hesitate to come back to me if you have questions, Geraldine ... View more

Hi Michelle, Shortly put you could use a SearchCursor that iterates over your point adresses and first creates for each point a custom buffer zone with a radius linked to the population density, limited to the underlying census polygon and excluding water bodies; then creates a random point within this zone using Create Random Points. And merge all points together when your cursor is done. I could provide you with details if you want but this is going to be very slow, it requires ArcInfo/ArcGIS Advanced and will maybe not be easy to do if you're not familiar with Python. I would suggest you to geocode your addresses to a least accurate level (e.g. street instead of address or city instead of street). Could this be an option for you? Geraldine ... View more

Hi Philip, You problem with the resolution of USGS DEM is mentioned here. Maybe you should just download the newer datasets. Techniques to create smoother contours are described in this page as well (e.g. using Focal Statistics to smooth the input ratser). If you have a Desktop Standard license, you can also use the Smooth Line tool. And there is a Smooth command in the Advanced Editing toolbar to smooth lines in an edit session. ... View more

Hi Toni, So do you have added "Min NPP1" to your filter value list? Are you sure there's no trailing space or whatsoever? ... View more

Hi Leo, You can do this using the "For" iterator. In this iterator you have to set a 'from' value and a 'to' value (here it depends on the value range of your DEM), and an incremental value (0.5). The tool you connect to 'Value' will execute for each value in the range you specify. Add the Raster Calculator to your model, open it and build your expression by dragging the DEM and the 'Value' variable from the 'Layers and Variables' window to the expression window (see attached image). Don't forget to add '%Value%' to the name of your output, otherwise you will overwrite the same output raster n times. This will not work with negative values though, as hyphens can't be use to name datasets. ... View more

Chris, Are you sure your feature layer is actually created? If you run your script tool in ArcMap (or even in ArcCatalog) and then open a tool using a feature layer as input (e.g. Select Layer By Location or Attribute) from the toolbox, do you see, in the input parameter window, a drop-down with your feature layer listed? ... View more

Hello Chris, I suppose you work with 9.x as you use gp and not arcpy. With ArcGIS 10.x, your outputs are added to ArcMap when you run your script from the Python window. But this is not always convenient if you have input parameters to enter before running the tool. When running your script as a script tool, you should use gp.SetParameterAsText() to turn your results into output parameters, in this case they will be added to the TOC. You should then also use gp.GetParameterAsText() instead of sys.argv[]. In the properties of your script tool, add parameters to match your script parameters. Set the type of your 'result' parameters to 'Derived' and direction to 'Output'. A small example: Workspace = gp.GetParameterAsText(0) # a gdb FCname = "line" fc = Workspace + "\\" + FCname gp.CreateFeatureclass_management(Workspace, FCname, "POLYLINE") gp.SetParameterAsText(1, fc) This works with 10.x, I suppose it is the same with 9.x. Hope this helps. ... View more