Latest Contributions by NeilAyres

Here is an example of getting the % of nulls in a raster. # calculate % no data cells in a raster. import sys, os, arcpy from arcpy import env from arcpy.sa import * if arcpy.CheckExtension("Spatial"):     arcpy.CheckOutExtension("Spatial") else:     print "No SA licence"     exit HomeDir = "c:/Data/Swala/BurkinaFaso/IPSurvey/" fgdb = "IPRasterData.gdb" InData = os.path.join(HomeDir, fgdb) env.workspace = InData env.overwriteOutput = True ListRast = arcpy.ListRasters() # ListTable = arcpy.ListTables() for r in ListRast:     print "Processing", r     Ras = arcpy.Raster(r)     NullRas = IsNull(Ras)     NCol = NullRas.width     NRow = NullRas.height     NCell = NCol * NRow     Mean = NullRas.mean     NNull = Mean * NCell     print "{} % Null {}".format(r, NNull / NCell * 100) ... View more

In ArcMap you insert a new data frame. Several frames if you like. These can then have different locations on your layout. ... View more

Not sure how you have arrived at the picture you have presented. But if you are converting various polygon datasets to a raster representation for some sort of SA based overlay analysis or something, why not use the Polygon to Raster tool : http://resources.arcgis.com/en/help/main/10.2/index.html#//001200000030000000 Use the environment settings, extent and cell size to get the grid you want. Good luck, ... View more

For formatting leading zeros I still prefer >>> n = 3 >>> str(n).zfill(3) '003' >>> ... View more

I am using v10.2 and regularly create polylineZM's from coordinates in python. So no bugs. Be aware that when you create the geometry you should specify the SR of that geometry. But that is unlikely to be the issue here. ... View more

Just have to use a row counter, so that on the first low, set Last_id = This_Id, something like... import arcpy  tbl = r"U:\Projects\Change.gdb\qryTable"  flds = ['OBJECTID', 'PLIDS', 'CYEAR', 'CNUMBER']  orderby = 'ORDER BY PLIDS, CYEAR'  objdel = []    last_id = None RowCnt = 0 with arcpy.da.SearchCursor(tbl, flds, "", "","", sql_clause=(None, orderby)) as sc:  for row in sc:  RowCnt +=1         this_id = row[3]  if RowCnt == 1: last_id = this_id else: if this_id == last_id:              this_object_id = row[0]              objdel.append(this_object_id)          last_id = this_id  print objdel  del row, sc  for l in objdel:      expression = "OBJECTID = %s"%(l)      uc = arcpy.da.UpdateCursor(tbl, "*", where_clause=expression)  for u in uc:          uc.deleteRow()  del l  Phew, still can't get this python highlighting right.... So the indentations are all messed up. And when I try to edit it, I see a bunch of overlapping lines. Sorry. ... View more

Well, I'm with Dan the man... Have you looked at your output of the intersect? Do both inputs have a common coord sys. Are the smaller polygons well formed, properly closed and so forth. Are there any errant polys that are hard to notice. Check the number of records both sides. Good luck. ... View more

Or even ... >>> n = 3 >>> str(n).zfill(3) '003' >>> Cheers, Neil ... View more

Richard, reading fc records of geometry and attributes into a dictionary for further processing works a treat (at the mo on v10.2). Used it often recently to do geometry comparisons (intersect etc). Cheers, Neil ... View more

Thanks Xander, that does look like the correct tool. Now if I knew how to flag your post as correct I would do it.... Cheers, N ... View more

When you first add the vector features into the scene, it will appear underneath (unless they're Z enabled). In the base heights tab, you have to tick on the float on surface and chose your dem raster. Sometimes because of rendering you add a slight offset to the vectors to make them appear slightly above the dem to make them fully visible. Good luck, Neil ... View more

A little bit more detail here please. Perhaps an example of your data and what you want to achieve. I have just checked but tools like the "Pivot table" tool is at an advanced level. Might need to do something with python, or export the data to excel to get to where you need to be. Neil ... View more