Spatial Statistical Analysis Report
Added on 2019-09-20
10 Pages4070 Words291 Views
|
|
|
SpatialStatisticalAnalysisIntroductionandreportThepurposeofthisprojectistogiveyousomeexperienceperformingspatialstatistical analysesandinterpretingthe results. Youwilldownloaddatainordertoperformtheseanalyses.Thisdocumentprovidesthestepsyouwillneedtofollowinordertocompletetheproject. Theoutcomeof thisprojectisareportina'journal"format. Thismeansthatthereportshouldhaveabrief"Introduction",a"Methods"section,anda"ResultsandDiscussion"section. Inthe "Methods"sectionwe wouldlikeyoutolistthefiles youusedandtheGIS methodsyouemployed(e.g.,Moran'sI). WedonotneedafullexplanationofMoran'sI,forinstance,onlyastatementthatyouuseditandanynon-defaultparametersusedfor thatmethod.TheideabehindtheMethodssectionisthatanotherGISpersoncouldreplicatetheworkthatyouhavedoneifgiventhesameoriginalfiles.Inthe "ResultsandDiscussion"section,youwillpresentyourresultsandbrieflydiscussthem.DataChicagoCommunityAreas(CCAs)withpercapitaincome (attached)CityofChicago'sChildhoodleaddata (CVS text -- CCA_Pb_csv.txt)Background DataChicommshapefile (ChicagoCommunityAreasincludingselectedeconomicdata)TheMapCollection,UniversityofChicagoLibrarysite doesnotdefinethefieldsintheArcViewshapefile. Herearethefield(variable)definitions:SHAPE=polygonCHICOMNO=ChicagoCommunityAreafour-digitnumberDISTNAME=ChicagoCommunityAreanumberDISTITLE=ChicagoCommunityAreanames FAMINC=familyincome,averageHOUSINC=householdincome,averagePERCAPINC=percapitaincome,average
![Spatial Statistical Analysis Report_1](/_next/image/?url=https%3A%2F%2Fdesklib.com%2Fmedia%2Fimages%2F524e0d15c93940ea8806b22301d9a9e4.jpg&w=3840&q=10)
MEDVALOOH=medianvalue,ownerunits(buildingorhousevalue)MEDRENT=mediangrossrentCityofChicago'sChildhoodleaddata(CCA_Pb_csv.txt)Theleaddatafilehasthefollowingfields:CA_No=ChicagoCommunityAreanumberComm_Area=ChicagoCommunityAreanamesNo_It_6yrs=Childisdefinedasagesixoryounger(<84months).Thepopulationofchildreninagivencommunityareaisbaseduponthe 2000census.No_Tested=Thenumberofchildrentestedincludesthetotalnumberofuniquechildrenwithanybloodleadtest(capillaryorvenous)reportedineachgivenyear.perc_Tested=(No_Tested/No_lt_6yrs)*100No_Elevated=Thenumberofchildrenwithanelevatedbloodleadlevel(i.e.leadpoisoned)countsthenumberofchildrenwhosehighestvenousbloodleadlevelwas10microgramsperdeciliterorhigher.perc_Elevated=(No_Elevated/No_Tested)* 100SpatialstatisticsMoran'sIThistoolmeasuresspatialautocorrelation(featuresimilarity)basednotonlyonfeaturelocationsaloneoronattributevaluesalone,butonboth
![Spatial Statistical Analysis Report_2](/_next/image/?url=https%3A%2F%2Fdesklib.com%2Fmedia%2Fimages%2Fe959d11a495e4ad79f85006b4a99e5e1.jpg&w=3840&q=10)
featurelocationsandfeaturevaluessimultaneously.Givenasetoffeaturesandanassociatedattribute,itevaluateswhetherthepatternexpressedisclustered,dispersedorrandom. AMoran'sIndexvaluenear+1.0indicatesclustering;anindexvaluenear-1.0indicatesdispersion. AZScoreis alsocalculatedtoassesswhetherthe observedclustering/dispersion isstatisticallysignificantornot.AnselinLocalMoran'sIAsdescribedintheArcGISHelpfile: Givenasetofweighteddatapoints,theClusterand OutlierAnalysistoolidentifiesthoseclustersof pointswithvaluessimilarinmagnitude,andthoseclustersofpointswithveryheterogeneousvalues.(Forlineandpolygonfeatures,centroidsarecalculatedpriortoanalysis). OutputincludesanIndexvalueandaZScoreforeachfeature. TheZScore representsthestatisticalsignificanceoftheindexvalueforthedistancespecified.
![Spatial Statistical Analysis Report_3](/_next/image/?url=https%3A%2F%2Fdesklib.com%2Fmedia%2Fimages%2F153df80562c14864a5793bf0544ccff9.jpg&w=3840&q=10)
End of preview
Want to access all the pages? Upload your documents or become a member.