Help with creating geostat layer in python

BenSciance — Thu, 24 Apr 2014 15:24:00 GMT

I'm trying to loop through feature classes and create a geostatistical layer and then convert the geo layer to points.

I've attempted to debug this problem myself, but would appreciate extra eyes on my code in case someone else can spot an error.

Here is a resource that I've referenced trying to fix my code:
http://forums.arcgis.com/threads/92508-Need-Help-Automation-of-Kriging-using-Model-builder-or-python-Reg

import arcpy from arcpy import env from arcpy.sa import* from arcpy.ga import*   arcpy.env.workspace = "C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\S_Gauges.gdb" arcpy.env.overwriteOutput=True  lyrpath = "C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\GA_lyrs"  ptpath="C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\GA_Krig.gdb"   # Check out the ArcGIS Geostatistical Analyst extension license arcpy.CheckOutExtension("GeoStats")   #modelTemplate="C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\GA_Model.lyr"  modelxml=("C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\EmpiricalBayesianKriging.xml")   print 'listing feature classes' fcs=arcpy.ListFeatureClasses("a734184")  for fc in fcs:     print fc     try:         print 'listing fields'         fields = arcpy.ListFields(fc,"Wlevel")         for field in fields:             print ("{0} is a type of {1} with a length of {2}".format(field.name, field.type, field.length))          zfield="Wlevel"          outlyr=lyrpath+"/"+fc+"_GA.lyr"         outpts=ptpath+"/"+fc+"_GA_pt"         #cellsize=0.0008333333333          print'creating geostatistical layer'         infc=fc + " Wlevel"         arcpy.GACreateGeostatisticalLayer_ga(modelxml,infc,outlyr)          print 'converting GA layer to grid'         arcpy.GALayerToPoints_ga(outlyr,fc,zfield,outpts)      except:         print arcpy.GetMessages()  print 'script complete'

I receive these error messages: a734184_GA.lyr does not exist or is not supported

I've checked my output folder that I've defined to store the new geostat layers, and there is nothing there, even though I received no error messages when running the CreateGeostatisticalLayer tool......

>>>  listing feature classes a734184 listing fields Wlevel is a type of Double with a length of 8 creating geostatistical layer converting GA layer to grid Executing: GALayerToPoints C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\GA_lyrs/a734184_GA.lyr C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\S_Gauges.gdb\a734184 Wlevel C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\GA_Krig.gdb\a734184_GA_pt ALL Start Time: Thu Apr 24 12:12:05 2014 Failed to execute. Parameters are not valid. ERROR 000732: Input geostatistical layer: Dataset C:\Users\mbs7038\Documents\New_Landsat_Imagery\For_Area_Calc\Gauges_For_AccuracyAssessment\S_Gauges\GA_lyrs/a734184_GA.lyr does not exist or is not supported Failed to execute (GALayerToPoints). Failed at Thu Apr 24 12:12:05 2014 (Elapsed Time: 0.00 seconds) script complete >>>

Re: Help with creating geostat layer in python

FilipKrál — Fri, 25 Apr 2014 18:13:42 GMT

Hi,
I believe your script doesn't work because the third parameter to GACreateGeostatisticalLayer_ga is not supposed to be a layer file, but a name of a layer that will be created in Python's memory.

Try changing the following rows:

#outlyr=lyrpath+"/"+fc+"_GA.lyr" outlyr = 'galayer'  #arcpy.GACreateGeostatisticalLayer_ga(modelxml,infc,outlyr) outlyr = arcpy.GACreateGeostatisticalLayer_ga(modelxml,infc,outlyr).getOutput(0)  # and add the following right above your 'except' statement # to delete the in-memory layer object before the next iteration arcpy.Delete_management(outlyr) del outlyr

Hope this helps,
Filip.

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Help with creating geostat layer in python

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