Do you work on the IS side of GIS, in ESRI geodatabases? The day may come when you are faced with culling domain values from what seems like a gazillion tables, organizing and verifying the values, and loading them into multiple domains.
Sorting through domain values by visually inspecting each column and loading domains one by one can get tiresome. It may be that you decide that the best thing to do is to learn how to script and automate much of the domain value sorting, validating and loading process.
Whether you are just starting out and want some tips, or whether you don't like scripting and just want something that works--this blog is for you.
This series of posts on domains will put you on your way. Each post describes a python script tool that can be added to an ArcGIS custom toolbox. Collectively, the tools automate the domain workflow, reduce errors, and save time.
Summary Of Tool
The Export Geodatabase Domains tool exports all ESRI geodatabase domains and associated values to a table.
For
column heading prefixes, choose from: "For ETL Source", "For ETL
Target" or "Other. This will result in, for example, SourceDomain,
TargetDomain, or just Domain. Default is "Other".
Output table columns are:
Domain (domain name)
DomainType ("CodedValue" or "Range")
Code (CodedValue domains only--Code value)
Description (CodedValue domains only--Code description)
RangeMin (Range domains only--Minimum value in the range)
RangeMax (Range domains only--Maximum value in the range)
DomainColType (Domain column type)
join_field (Code and Description in lower case, concatenated with an underscore)
Code_Description (Code and Description, concatenated with an underscore)
Columns are populated as appropriate for each domain type. The last two columns are designed for quality assurance.
Use
the output from this tool for verifying and editing domain values, for
domain documentation, as well as for a domain loading table (with the Batch Domain Loading tool in this toolbox).
Illustration
Usage
There is no usage for this tool.
Syntax
GdbDomainsToTable_mytools (Input_Workspace, Column_Heading_Prefix_To_Use, Output_Workspace, Output_Table_Name)
| Parameter | Explanation | Data Type |
|---|---|---|
| Input_Workspace |
Dialog Reference Geodatabase whose domains and values you want to list ___________________ Python Reference Geodatabase whose domains and values you want to list |
Workspace |
| Column_Heading_Prefix_To_Use |
Dialog Reference Choice "For ETL Source", "For ETL Target" or "Other" - Default Other. ___________________ Python Reference Choice "For ETL Source", "For ETL Target" or "Other" - Default Other. |
String |
| Output_Workspace |
Dialog Reference Output workspace ___________________ Python Reference Output workspace |
Workspace |
| Output_Table_Name |
Dialog Reference Output table name ___________________ Python Reference Output table name |
String |
Code Samples
ExportGeodatabaseDomains.py
See below for tool source code.
import arcpy, traceback, sys, os
arcpy.env.overwriteOutput = True
def insert_rows(in_layer, field_list, rows_to_insert):
# USES DA.INSERTCURSOR TO INSERT ROWS OF DATA INTO INPUT TABLE.
# PARAMETERS: INPUT LAYER, LIST OF FIELD NAME STRINGS, LIST OF DATA ROW LISTS.
cursor = arcpy.da.InsertCursor(in_layer, field_list)
for row in rows_to_insert:
cursor.insertRow(row)
del cursor
def unicode2ascii(in_string):
'''CONVERTS A STRING WITH UNICODE CHARACTERS TO ASCII (TO USE AS STRING).
REMOVES LEFT AND RIGHT SLANTED SINGLE AND DOUBLE QUOTES AND M-DASHES'''
s = in_string
s = unicode(val).replace(u'\u2018', u"'").replace(u'\u2019', u"'").replace(u'\u2013', u'-').replace(u'\u201c', u'"').replace(u'\u201d', u'"')
s.encode('ascii')
return s
if __name__ == "__main__":
in_workspace = arcpy.GetParameterAsText(0) # WORKSPACE
prefix_chosen = arcpy.GetParameterAsText(1) # STRING, FILTER "For ETL Source",
# "For ETL Target", "Other"
out_workspace = arcpy.GetParameterAsText(2) # WORKSPACE
out_table_name = arcpy.GetParameterAsText(3) # STRING
try:
arcpy.AddMessage(" ")
# CREATE FIELD NAMES
if prefix_chosen == "For ETL Source":
n_prefix = "Source"
s_prefix = "SrcDom"
elif prefix_chosen == "For ETL Target":
n_prefix = "Target"
s_prefix = "TrgDom"
n_suffix = ""
else:
n_prefix = ""
s_prefix = ""
col_name = n_prefix + "Domain"
col_type = n_prefix + "DomainType"
col_code = n_prefix + "Code"
col_desc = n_prefix + "Description"
col_min = s_prefix + "RangeMin"
col_max = s_prefix + "RangeMax"
col_ctype = s_prefix + "DomainColType"
col_join = "join_field"
col_code_desc = "Code_Description"
arcpy.AddMessage(" Getting domain names from workspace...")
domains = arcpy.da.ListDomains(in_workspace)
arcpy.AddMessage(" Creating table...")
out_table = arcpy.CreateTable_management(out_workspace, out_table_name)
field_names = [col_name, col_type, col_code, col_desc, col_min, col_max, col_ctype, col_join, col_code_desc]
for fn in field_names:
arcpy.AddField_management(out_table, str(fn), "text", field_length=255)
arcpy.AddMessage(" Getting domain values from workspace...")
# CREATE LIST TO HOLD ROWS OF DATA TO INSERT INTO OUTPUT TABLE
rows_to_insert = []
# ITERATE DOMAINS
for domain in domains:
domain_name = domain.name
if domain.domainType == 'CodedValue':
t = []
# ITERATE DOMAIN VALUES
for val, desc in domain.codedValues.items():
# CONVERT UNICODE CHARACTERS TO ASCII TO REMOVE INVALID CHARS
asc_val = unicode2ascii(val)
asc_desc = unicode2ascii(desc)
# CREATE INSERT-ROW LIST AND APPEND TO ROWS-TO-INSERT LIST
t = [str(domain_name), str(domain.domainType), str(asc_val), str(asc_desc), None, None, str(domain.type),
str(domain_name.lower()) + "_" + str(asc_val).lower(), str(domain_name) + "_" + str(asc_val)]
rows_to_insert.append(t)
elif domain.domainType == 'Range':
t = []
# CREATE INSERT-ROW LIST FOR RANGE DOMAIN AND APPEND TO ROWS-TO-INSERT LIST
if domain.type in ("Long", "Short"):
# MAKE SURE INTEGERS COME OUT AS INTEGERS
t = [str(domain_name), str(domain.domainType), None, None, str(int(domain.range[0])), str(int(domain.range[1])),
str(domain.type), str(domain_name.lower()) + "_" + str(int(domain.range[0])) + "_" + str(int(domain.range[1])),
str(domain_name) + "_" + str(int(domain.range[0])) + "_" + str(int(domain.range[1]))]
else:
t = [str(domain_name), str(domain.domainType), None, None, str(domain.range[0]), str(domain.range[1]), str(domain.type),
str(domain_name.lower()) + "_" + str(domain.range[0]) + "_" + str(domain.range[1]),
str(domain_name) + "_" + str(domain.range[0]) + "_" + str(domain.range[1])]
rows_to_insert.append(t)
# POPULATE OUTPUT TABLE
arcpy.AddMessage(" Creating output table...")
insert_rows(out_table, field_names, rows_to_insert)
# SET OUTPUT PARAMETER
arcpy.SetParameter(4, out_table) # TABLEVIEW
arcpy.AddMessage(" ")
except:
# PRINT ERROR MESSAGES
tb = sys.exc_info()[2]
tbinfo = traceback.format_tb(tb)[0]
pymsg = tbinfo + "\n" + str(sys.exc_type)+ ": " + str(sys.exc_value)
arcpy.AddError("Python Messages: " + pymsg + " GP Messages: " + arcpy.GetMessages(2))
finally:
del in_workspace, prefix_chosen, out_workspace, out_table_name
del domains, rows_to_insert, out_table
del col_name, col_type, col_code, col_desc, col_min, col_max
Tags
geodatabase, domain, Describe, CreateTable, ListDomains, InsertCursor, AddField
Credits
Ruth Bowers, 2015, 2016.
Use limitations
ESRI geodatabases only. Tested as ArcGIS 10.2.2 python script tool in custom toolbox.
