Latest Contributions by DanPatterson_Retired

check the online help, http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00s300000030000000.htm you can start at the top of the arcpy mapping tree and follow it down for information on classes etc http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Geoprocessing_scripts_for_map_document_management_and_output/00s300000032000000/ ... View more

this line >>> GP = Dispatch ("esri.Geoprocessing.GPDispatch.1") is not needed since the geoprocessor was created earlier >>> gp = arcgisscripting.create and no module or method called Dispatch exists in your import statements or within their functions ... View more

You would have to troll the academic papers on methods of estimating diffuse radiation and atmospheric transmissivity to get answer for you particular area, I suspect the provided defaults are global estimates. ... View more

I would say you should study "Diffuse Proportion" and "Transmittivity" before you use the tool since they refer to parameters associated with the atmosphere.  You can vary these parameters to see their affect, but using the defaults would not be appropriate unless they apply to your circumstances ... View more

I have seen weirdness in version 10...sometimes, simply saving the project, closing arcmap, restarting allows me to fix this "issue"  Other times it doesn't let me.  Also, if you want to use a field for 2 parameters, it doesn't allow you to use the same feature layer (or layer, or featureclass).  There appears to be no rhyme or reason to this and it is frustrating since the multiple input option isn't an option if you want to use one field for one parameter and another field for another.  I would put this down to a bug, but I don't have the time at present to document a complete workflow to document the process...it is on my summer list of things to do. ... View more

you answered your own question....join using the FID field (assuming you are using  shapefiles).  To make the join permanent, simply export the file to a new file (in v 10,right-click on the layer,  Data, Export Data etc) ... View more

you might want to consider using the setnull instead http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z00000007000000.htm ... View more

Just a check if it is that particular shapefile... 1  File|Data Export Data give it a new name and saving location 2  try the code on the "clone" or if you have some bad records 3  select the first couple of records in the table and try running the code on the selection 4  if that still doesn't work, select one record, export to a new file and try again. if that doesn't work...no clue ... View more

this issue has been raised before http://ideas.arcgis.com/ideaView?id=087300000008JQKAA2 http://forums.arcgis.com/threads/3363-Where-are-the-ArcScripts-Code-galleries-in-the-ArcGIS-Resource-Centre join the club ... View more

see this page, particularly step 6 if you wish to change the order of things http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00150000001v000000.htm ... View more

did you try the second as well?  is your field an integer field?  worked on my computer ... View more

keywords:  insertcursor, array http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//002z0000001v000000.htm has some ideas ... View more

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/How_to_change_NoData_cells_to_a_value/009z000000ms000000/ untested Con(IsNull("Scaled_8bit"), 0 ,"Scaled_8bit") or something along that line ... View more

parser:  Python Prelogic code section def split_string(a_field):   return a_field.split(";")[0] expression section split_string(!textfield!)  #where !textField! is the field you are trying to split ... View more

stupids finally over parser:  Python Code block import numpy def rand_num(a_field):   return  numpy.random.randint(1,1000) the rest rand_num(!randnum!) where !randnum! is the field to place the random numbers.  I think you were mixing up the script example with the field calculator example and I just didn't catch it or better still provide a minimum and maximum value import numpy def rand_num(min_val, max_val):   return  numpy.random.randint(min_val,max_val) with rand_num(1,1000) calling the function ... View more