Automate map production with custom inset extents

Export fire READ maps DDP individual pdf export.py

# Purpose: to generate a mapbook for Channel Islands National Park.  Originally this is for fire resource advisor maps, 
# but can be adapted to any mapbook purpose.  The main thing this script does beyond a normal data driven pages output 
# is custom zooming to the island extent in the inset map.  Without the custom zooming to each island, the inset map would 
# be too small and would not make for a useable inset to reference where the user was looking at each grid cell.  
# This script looks up the island three digit code within the page name of the data driven pages and zooms to that island 
# based off the three digit code. 
# Author: Rocky Rudolph, GISP, GIS Specialist, Channel Islands National Park, rocky_rudolph@nps.gov
# Date: 12/15/2017

print("Importing modules")
import arcpy, os

# To turn it into facing pages, follow this
# http://desktop.arcgis.com/en/arcmap/10.3/map/page-layouts/creating-a-map-book-with-facing-pages.htm

# The exents can be found by zooming the inset frame to the desire extent and running this code
# in the arcpy window in ArcMap.  Then convert to a dictionary. 
# mxd = arcpy.mapping.MapDocument(r"CURRENT")
# insetdf = arcpy.mapping.ListDataFrames(mxd)[1]
# print(insetdf.extent)
ext = {"SMI":(-46050.5853997891, -446865.821368743, -25059.9834185779, -435323.022283148),
"SRI":(-28860.3701013181, -459688.596747635, 7190.44324573367, -439864.139320936),
"SCI":(3044.63809297324, -455215.166872286, 46532.0276017449, -431301.31245753),
"ANI":(50077.1997830257, -447636.65351233, 61773.8654679639, -441204.619686265 ),
"SBI":(81643.5536542199, -507533.040362624, 96907.7023730642, -499139.236219609 )}

def exportPDF(pageName):
	"""Export the pdf to the specified folder and append it to the master pdf."""
	print("Exporting page {0} of {1}").format(str(mxd.dataDrivenPages.currentPageID), str(mxd.dataDrivenPages.pageCount))
	outPDF = outFolder + "Fire_READ_" + str(pageName)+ ".pdf"
	arcpy.mapping.ExportToPDF(mxd, outPDF, resolution="100")
	finalPdf.appendPages(outPDF)
	
def MakeNewExtent(island):
	"""Get the inset data frame's extent and change it
	to whatever island the mabook is currently on."""
	insetdf = arcpy.mapping.ListDataFrames(mxd)[1]
	newExtent = insetdf.extent
	# Reference the dictionary based on the desired island to zoom to.
	newExtent.XMin, newExtent.YMin = ext[island][0], ext[island][1]
	newExtent.XMax, newExtent.YMax = ext[island][2], ext[island][3]
	insetdf.extent = newExtent

#Specify the map document
mxd = arcpy.mapping.MapDocument(r"C:\GIS\Projects\Fire READ Maps\CHIS Fire READ Mapbook 11x17 Field.mxd")
# mxd = arcpy.mapping.MapDocument(r"CURRENT")

outFolder = r"C:\GIS\Projects\Fire READ Maps\Export Maps\\"

finalpdf_filename = outFolder + "CHIS Fire READ Mapbook.pdf"
if os.path.exists(finalpdf_filename):
	os.remove(finalpdf_filename)
finalPdf = arcpy.mapping.PDFDocumentCreate(finalpdf_filename) 

# Append existing pre-made legend title page and overview maps
finalPdf.appendPages(outFolder + "Fire_READ_Legend.pdf")
finalPdf.appendPages(outFolder + "CHIS Fire READ Mapbook 11x17 Index.pdf")

pageNameField = "Grid_ID"  
# Export each of the data driven pages
for pageNum in range(1, mxd.dataDrivenPages.pageCount + 1):
	mxd.dataDrivenPages.currentPageID = pageNum
	pageName = mxd.dataDrivenPages.pageRow.getValue(pageNameField)  
	print(pageName)
	
	# Check the current page name and adjust the inset map extent according
	# to which island it is on.  Then export the map and append to the master pdf.
	if "SMI" in pageName:
		MakeNewExtent("SMI")
		exportPDF(pageName)
		
	elif "SRI" in pageName:
		MakeNewExtent("SRI")
		exportPDF(pageName)

	elif "SCI" in pageName:
		MakeNewExtent("SCI")
		exportPDF(pageName)

	elif "ANI" in pageName:
		MakeNewExtent("ANI")
		exportPDF(pageName)

	elif "SBI" in pageName:
		MakeNewExtent("SBI")
		exportPDF(pageName)
		
	else:
		print("Skipping " + pageName)

finalPdf.updateDocProperties(pdf_open_view="USE_THUMBS",
                             pdf_layout="SINGLE_PAGE")

finalPdf.saveAndClose()

del mxd, pageName, finalPdf

print("Done.")