ESSM/GEOG 462: Advanced GIS Ecosystem Science and Management | Texas A&M University (c) 2015, A. Michelle Lawing Advanced Geoprocessing and ModelBuilder Concepts A. Michelle Lawing Ecosystem Science and Management Texas A&M University College StaPon, TX 77843 [email protected]
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ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
AdvancedGeoprocessingandModelBuilderConcepts
A.MichelleLawingEcosystemScienceandManagementTexasA&MUniversityCollegeStaPon,[email protected]
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
Announcements
• OPTIONAL:ReviseandresubmityourProposal!Oneweek–yougetuptohalfthepointsbackthatyoulost.
• Dr.Smithiscomingnextweek(Nov.10th)tolectureaboutArcGISOnline.
• EstablishyourArcGISOnlineloginUsername:email_tamuPassword:password1
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ModelBuilder
• NowyouhavehadsomepracPcewithModelBuilder
• TodaywewilltalkaboutsomeadvancedprocessingopPons
• Thesearecommontoolsusedinanygeoprocessingframework
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ManagingIntermediateData
• GISanalysiscangetmessy• Mostofthetoolsthatyourunproduceanoutputdataset
• Whenyouchainmanytoolstogetherthosedatasetsstartpilingup
• It'seasytowindupwithafolderfullofdatasetswithnameslikebuffers1,clippedbuffers1,intersectedandclippedbuffers1,raster2reclassified,etc.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ManagingIntermediateData
• Inmostcases,youareconcernedwithjustthefinaloutputdataset
• Intermediatedataarejusttemporary• Youonlyneedtokeepitaroundtorunthemodel,andthenitcanbedeleted
• ModelBuildercanmanageyourintermediatedataforyou
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ManagingIntermediateData
• ModelBuilderwillplaceintermediatedatainatemporarydirectorycalledthescratchworkspace
• ThescratchworkspaceisyouroperaPngsystem'stempdirectory
• YoucanconfigureittoexistinanotherlocaPon
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ManagingIntermediateData
• Youcanforcedatatogointothescratchworkspacebyusingthe%SCRATCHWORKSPACE%variableinthepath
• Forexample:%SCRATCHWORKSPACE%\myOutput.shp
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ManagingIntermediateData
• YoucanalsomarkanyelementinModelBuilderasIntermediateanditwillbedeletedakerthemodelisrun
• Bydefault,allderiveddataareIntermediatedata
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
LoopinginModelBuilder
• Looping,oriteraPon,istheactofrepeaPngaprocess
• Amainbenefitofcomputersistheirabilitytoquicklyrepeattasksthatwouldotherwisebemundane,cumbersome,orerror-proneforahumantorepeatandrecord
• Loopingisakeyconceptincomputerprogrammingandyouwilluseitokeningeoprocessing
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
LoopinginModelBuilder
• ModelBuildercontainsanumberofelementscalledIteratorsthatcandoloopinginvariousways
• Thenamesoftheseiterators,suchasForandWhileactuallymimicthetypesofloopingthatyoucanprograminPythonandotherlanguages
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
LoopinginModelBuilder
Iterator:For
DescripPon:IteratesoverastarPngandendingvaluebyagivenvalue.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
LoopinginModelBuilder
Iterator:While
DescripPon:Executes"while"acondiPonistrueorfalsefortheinputorsetofinputs
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
LoopinginModelBuilder
• IterateFeatureSelecPon-Iteratesoverfeaturesinafeatureclass
• IterateRowSelecPon-Iteratesoverrowsinatable• IterateFieldValues-Iteratesovereachvalueinafield
• IterateMulPvalue-Iteratesoveralistofvalues• IterateDatasets-IteratesoverdatasetsinaWorkspaceorFeatureDataset
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
LoopinginModelBuilder
• IterateFeatureClasses-IteratesoverfeatureclassesinaWorkspaceorFeatureDataset
• IterateFiles-Iteratesoverfilesinafolder• IterateRasters-IteratesoverrastersinaWorkspaceoraRasterCatalog
• IterateTables-Iteratesovertablesinaworkspace• IterateWorkspaces-Iteratesoverworkspacesinafolder
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• Eachiteratorhasasetofparametersthatmaydifferfromtheotheriterators
• Theoverallstructureofalliteratortoolsisverysimilar
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• IterateFeatureClassesrequiresanInputWorkspacewhereallthefeatureclassestoiteratethrougharestored
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• WildcardandFeatureTypeareusedtorestrictwhatfeatureclassesintheworkspaceareiterated
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• Wildcardlimitsthefeatureclassesbytheirnames• FeatureTypelimitsthefeatureclassesbytheirfeaturetypes
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• RecursiveisusedtocontroltheiteraPonoverfeatureclasseswithinsubfoldersintheworkspace
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• IterateFeatureClasseshastwooutputvariables:theoutputfeatureclassandthenameofthefeatureclass
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• Theoutputfeatureclasscanbeconnectedtothenexttoolforprocessing
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• NamecanbeusedforinlinevariablesubsPtuPon
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
UnderstandinganIterator
• Forexample,iftheBuffertoolwasaddedtothemodel,andtheFeatureClassvariablewasconnectedtothetool,everyfeatureclassintheworkspacewouldbebuffered
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
Notes
• Onlyoneiteratorcanbeusedpermodel.• TheopPonstoaddanotheriteratorwillbedisabledifoneiteratorexistsinthemodel.
• Ifaniteratorisaddedtoamodel,alltoolsinthemodeliterateforeachvalueintheiterator.
• Ifyoudonotwanttoruneachtoolinthemodelforeachiteratedvalue,createasubmodel/modelwithinamodelthatcontainsonlytheiteratorandadditasamodeltoolintothemainmodel.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
Notes
• IfamodelcontaininganiteratorisexportedtoaPythonscript,thescriptwillnotincludetheitera1onlogic.
• PythonlisPnglogiccanbeaddedtothescripttoachieveasimilareffect.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator
WewillusetheIterateFeatureClassesiteratorto1. Projecteveryfeatureclassinaworkspace2. NameeachProjecttooloutputdynamicallybased
ontheinputnameusinginlinevariablesubs1tu1on
3. Addanewfieldtoeachfeatureclass.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator
• AninputworkspaceisspecifiedforIterateFeatureClassestoiteratethrougheveryfeatureclassinthatworkspace.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator
• Featureclassestoiteratethrougharerestrictedbyspecifyingawildcardandfeaturetype(onlypolygonfeatureclasseswithwithIwillbeiteratedthrough)
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator
• IterateFeatureClassesproducestwooutputs:thefeatureclassiteratedthroughandthenameofthefeatureclass
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator
• ThefeatureclassvariableisconnectedastheinputtotheProjecttool
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator• ThefeatureclassnamevariableisusedforinlinevariablesubsPtuPontodynamicallynameeachoutputfromtheProjecttoolwiththesamenameoftheinputfeatureclass
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
ExampleusinganIterator• AnewfieldisaddedtoeveryfeatureclassbyconnecPngtheAddFieldtool.
ESSM/GEOG462:AdvancedGISEcosystemScienceandManagement|TexasA&MUniversity(c)2015,A.MichelleLawing
AccessingIteratorsinModelBuilder
• Insertmenu-ClickInsert>Iteratorsandchooseaniteratortoaddtothemodel
• Shortcutmenu-Right-clickinopenspaceinthemodel,clickIterators,thenchoosetheiteratortoaddtothemodel
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