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ToolExpressCalc.py
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ToolExpressCalc.py
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#!/usr/bin/python
# ---------------------------------------------------------------------------
# Copyright 2014, Houston Engineering Inc., All Rights Reserved
# Description: Non-Contributing Terrain Analysis - Prefill
# Author: Paul Hedlund
# Created: April 2014
# ---------------------------------------------------------------------------
import sys, datetime, arcpy, time
from arcpy.sa import *
from arcpy import env
def main():
try:
#Start tracking time ------------------------------------------------------------------------
start = time.time()
starttime = str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
#Check out Spatial Analyst Extensions -------------------------------------------------------
blnLicSA = ExtensionManagment("spatial", "Spatial Analyst")
if blnLicSA:
return
##Script Settings----------------------------------------------------------------------------
#fillDirectionRaster = r'D:\ZMapdata\NonContrib\1915250_noncontribgdb.gdb\fdr_total'
#depressionPrefill = r'D:\ZMapdata\NonContrib\1915250_noncontribgdb.gdb\Filtered_Depressions'
#inputCNgrid = r'D:\ZMapdata\NonContrib\1915250_noncontribgdb.gdb\curve_num'
#inputRainfall = r'D:\ZMapdata\NonContrib\1915250_noncontribgdb.gdb\rainfall2'
#depthRaster = r'D:\ZMapdata\NonContrib\1915250_noncontribgdb.gdb\raw_dem'
#outputExcess = r'D:\ZMapdata\NonContrib\1915250_noncontribgdb.gdb'
#Script Settings----------------------------------------------------------------------------
fillDirectionRaster = arcpy.GetParameterAsText(0)
depressionPrefill = arcpy.GetParameterAsText(1)
inputCNgrid = arcpy.GetParameterAsText(2)
inputRainfall = arcpy.GetParameterAsText(3)
depthRaster = arcpy.GetParameterAsText(4)
outputExcess = arcpy.GetParameterAsText(5)
#Validate Raster Size among input rasters
arcpy.AddMessage("Validate grid cell sizes ...")
InputRasterList = []
InputRasterList.append(fillDirectionRaster)
InputRasterList.append(depressionPrefill)
InputRasterList.append(inputCNgrid)
InputRasterList.append(inputRainfall)
InputRasterList.append(depthRaster)
blnValidate = ValidateGridSizeMatch(InputRasterList)
if blnValidate:
return
#Cell size
rasterCellSurface = GetCellSize(fillDirectionRaster)
# Set Geoprocessing environments
tempGDB = arcpy.env.scratchGDB
arcpy.env.scratchworkspace = tempGDB
arcpy.env.overwriteOutput = True
arcpy.env.snapRaster = fillDirectionRaster
arcpy.env.cellSize = rasterCellSurface
arcpy.env.extent = fillDirectionRaster
numcores = multiprocessing.cpu_count() - 1
if numcores > 4:
arcpy.env.parallelProcessingFactor = '4'
else:
arcpy.env.parallelProcessingFactor = str(numcores)
#--------------------------------------------------------------------------------------------
# Process: Watershed (2)
arcpy.AddMessage("Watershed (2) ...")
valElapsed = time.time()
outWatershed = Watershed(fillDirectionRaster,depressionPrefill, "VALUE")
PrintTime(start,valElapsed,True)
# Process: Lookup
arcpy.AddMessage("Lookup ...")
valElapsed = time.time()
outLookup = Lookup(outWatershed,"COUNT")
PrintTime(start,valElapsed,True)
# Process: Zonal Statistics (14)
arcpy.AddMessage("Calculate Mean CN ...")
valElapsed = time.time()
meanCN = ZonalStatistics(outWatershed, "VALUE", inputCNgrid, "MEAN", "DATA")
PrintTime(start,valElapsed,True)
# Process: Zonal Statistics (13)
arcpy.AddMessage("Calcalulate Mean Rainfall ...")
valElapsed = time.time()
MeanRainfall = ZonalStatistics(outWatershed, "VALUE", inputRainfall, "MEAN", "DATA")
PrintTime(start,valElapsed,True)
# Process: Raster Calculator
arcpy.AddMessage("Raster Calculator Math ...")
valElapsed = time.time()
SCS_pe = (Con((((1000 / meanCN) - 10) * 0.2) - MeanRainfall , (Square((MeanRainfall - (((1000 / meanCN) - 10) * 0.2)))) / (MeanRainfall + (0.8 * ((1000 / meanCN) - 10))) , 0 , "VALUE < 0" )) / (3.28084 * 12)
PrintTime(start,valElapsed,True)
del meanCN
del MeanRainfall
# Process: Build Raster Attribute Table
arcpy.AddMessage("Build Raster Attribute Table ...")
valElapsed = time.time()
arcpy.BuildRasterAttributeTable_management(outWatershed, "Overwrite")
PrintTime(start,valElapsed,True)
# Process: Times
arcpy.AddMessage("Times ...")
valElapsed = time.time()
outVolume = Times((rasterCellSurface **2), depthRaster)
PrintTime(start,valElapsed,True)
# Process: Minus (2)
arcpy.AddMessage("Create depr_excess ...")
valElapsed = time.time()
minus1 = Minus(Times(Times(outLookup, (rasterCellSurface **2)), SCS_pe), ZonalStatistics(outWatershed, "VALUE", ExtractByMask(SetNull(outVolume, outVolume, "VALUE < 0"), depressionPrefill), "SUM", "DATA"))
minus1.save(outputExcess + r"\depr_excess")
PrintTime(start,valElapsed,True)
del outWatershed
del SCS_pe
del outVolume
del minus1
# Process: Divide
arcpy.AddMessage("Divide ...")
valElapsed = time.time()
outDivide = Divide(outputExcess + r"\depr_excess", outLookup)
outDivide.save(outputExcess + r"\excess_percel")
PrintTime(start,valElapsed,True)
del outLookup
del outDivide
#Add to Map
AddRastertoMap(outputExcess + r"\depr_excess")
AddRastertoMap(outputExcess + r"\excess_percel")
#Completed Time
arcpy.AddMessage("Completetion Time")
timestamp = str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
elapsedtime = secondsToStr(time.time() - start)[:-4]
arcpy.AddMessage("Start Time : " + str(starttime))
arcpy.AddMessage("End Time : " + str(timestamp))
arcpy.AddMessage("Processing Time : " + str(elapsedtime))
arcpy.AddMessage("Tool Express Calc Complete!")
except:
strError = sys.exc_info()[1]
intLineValue = sys.exc_info()[2]
strLine = str(intLineValue.tb_lineno)
timestamp = str(datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
arcpy.AddMessage(timestamp + ': Error occured processing Express Calc script! - ' + 'Line:' + strLine + ' - Error:' + str(strError))
#//////////////// Functions//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
def secondsToStr(t):
rediv = lambda ll,b : list(divmod(ll[0],b)) + ll[1:]
return "%d:%02d:%02d.%03d" % tuple(reduce(rediv,[[t*1000,], 1000,60,60]))
def ExtensionManagment(ExtID, ExtName):
if arcpy.CheckExtension(ExtID) == "Available":
arcpy.AddMessage("Checking out the " + ExtName + " extension ...")
arcpy.CheckOutExtension(ExtID)
return False
elif arcpy.CheckExtension(ExtID) == "Unavailable":
arcpy.AddError("The " + ExtName + " extension is currently unavailable")
return True
elif arcpy.CheckExtension(ExtID) == "NotLicensed":
arcpy.AddError("You are currently not license to use " + ExtName + ", the tool can not be run!")
return True
elif arcpy.CheckExtension(ExtID) == "Failed":
arcpy.AddError("A system failure occurred during the request!")
return True
def PrintTime(start, valElapsed, blnShowElapsed):
#Get total and elapsed time
if not blnShowElapsed:
arcpy.AddMessage(" - Total - " + secondsToStr(time.time() - start)[:-4])
else:
arcpy.AddMessage(" - Total - " + secondsToStr(time.time() - start)[:-4] + " (Elapsed: " + secondsToStr(time.time() - valElapsed)[:-4] + ")")
def ProductManagmentArcInfo(Product):
#Check this is an ArcInfo License
if arcpy.CheckProduct(Product) == "AlreadyInitialized":
arcpy.AddMessage(Product + " license found...")
return False
elif arcpy.CheckProduct(Product) == "Available":
arcpy.AddMessage(Product + " license found...")
return False
else:
return True
def ProductManagment(Product):
#Check this is an ArcInfo License
if arcpy.CheckProduct(Product) == "AlreadyInitialized":
arcpy.AddMessage(Product + " license found...")
return False
elif arcpy.CheckProduct(Product) == "Available":
arcpy.AddMessage(Product + " license found...")
return False
elif arcpy.CheckProduct(Product) == "Unavailable":
#arcpy.AddError("An " + Product + " license is required to run this tool!")
return True
elif arcpy.CheckProduct(Product) == "NotLicensed":
#arcpy.AddError("An " + Product + " license is required to run this tool!")
return True
elif arcpy.CheckProduct(Product) == "Failed":
arcpy.AddError("A system failure occurred during the request!")
return True
def GetCellSize(InputRaster):
#Get grid size
GetCellSize = arcpy.GetRasterProperties_management (InputRaster , "CELLSIZEX")
GridSize = GetCellSize.getOutput(0)
arcpy.AddMessage("Raster Cellsize = " + GridSize)
return float(GridSize)
def ValidateGridSizeMatch(InputRasterList):
#Validate grid size
blnResults = False
i = 0
for iRaster in InputRasterList:
GetCellSize = arcpy.GetRasterProperties_management (iRaster, "CELLSIZEX")
GridSize = float(GetCellSize.getOutput(0))
if i <> 0:
if not (GridSize - 0.02) <= preGridSize <= (GridSize + 0.02):
blnResults = True
break
preGridSize = GridSize
i += 1
if blnResults:
arcpy.AddError("The grid cell size does not match among all the input rasters!")
return blnResults
def AddRastertoMap(InputRaster):
try:
mxd = arcpy.mapping.MapDocument("Current")
except:
return
df = arcpy.mapping.ListDataFrames(mxd, "*")[0]
RasterFile = arcpy.mapping.Layer(InputRaster)
RasterFile.visible = False
arcpy.mapping.AddLayer(df, RasterFile, "TOP")
if __name__ == "__main__": main()