I have a base "fishnet" polygon grid. I attempted to create a model that iterates over each cell in that base fishnet grid and subdivide that cell with the Create Fishnet tool into a new feature class.
I expected that I simply would need to set the output from my iterate feature iterator as the 'Template Extent' parameter for the Create Fishnet tool. However, while I can see the name of this iterator output model variable in the drop-down list for the 'Template Extent' parameter; the name does not have the blue Model Variable icon. And more importantly, the template extent does not update at each model iteration.
Is there a way that I can make my model recognize aan iteration output as a template extent? ( see screenshot below)
import arcgisscripting gp = arcgisscripting.create(9.3) #you will need to modify these two parameters for your situation. This is an ex of a pgdb FeatureClass inputLocation = "\\\\C:\Scratch.mdb" inputFC = inputLocation + "\\exGRID" # Open a search cursor on a feature class rows = gp.searchcursor(inputFC) row = rows.Next() i = 1 while row: gp.AddMessage("Attempting to process polgyon " + str(i)) #Get the shape field shape = row.shape #Get the extent object extent = shape.extent outputName = "Fishnet_" + str(i) outFC = inputLocation + "\\" + outputName #Get the origin (lowerLeft) and y-axis (upperLeft) properties of the polygon ll = extent.lowerleft ul = extent.upperleft ur = extent.upperright originXY = str(ll.x) + " " + str(ll.y) yaxisXY = str(ul.x) + " " + str(ul.y) opp_corner = str(ur.x) + " " + str(ur.y) gp.AddMessage("LowerLeft (x,y): %f, %f" % (ll.x, ll.y)) gp.AddMessage("UpperLeft (x,y): %f, %f" % (ul.x, ul.y)) gp.AddMessage("XMin: %f" % (extent.xmin)) gp.AddMessage("YMin: %f" % (extent.ymin)) gp.AddMessage("XMax: %f" % (extent.xmax)) gp.AddMessage("YMax: %f" % (extent.ymax)) #keep the cell width/height set to zero as it will use the opp_corner to figure it out cellWidth = 0 cellHeight = 0 #plug in the #rows/#cols you want the output grids to contain nrows = 10 ncols = 10 gp.CreateFishnet_management(outFC, originXY, yaxisXY, cellWidth, cellHeight, nrows, ncols, opp_corner) gp.AddMessage("Created " + outputName) i = i + 1 row = rows.Next()