Transcription
Site SelectionMaking Spatial Decisions Using GISSite Selection - IAP 2011January 26, 2011
Why would I use Site Selection Tools?Decide on an appropriate location for a newbuildingUncover areas of risk for geologic hazardsPinpoint areas for developmentEstablish safe zones for habitationSite Selection - IAP 2011January 26, 2011
Add Layers of Data to GISCensusInfrastructureEnvironmentalAnalyze Layers TogetherSite Selection - IAP 2011January 26, 2011
Keep in mind Data issues in vector processingComplex world, simplified dataReal world becomes vector data (as points,lines and polygons)You choose which data to use, and how torepresent it.Site Selection - IAP 2011January 26, 2011
Selection of features for use in a GISOnly details of interest to the creator arestored in the data.Metadata: who made the data and why youshould use it, or not!Site Selection - IAP 2011January 26, 2011
Representation of dataTied to scale and datatype Cityas point or polygon? Vector objects in a GIShave defined boundaries,unlike nature (transition inforests)Site Selection - IAP 2011January 26, 2011
Overlay operations in a GISOrigins in Landscape PlanningSet theory – polygons represent sets, overlayrepresents intersects, unions and symmetricaldifferenceSite Selection - IAP 2011January 26, 2011
Some Analysis Tools:ClipBufferUnionSymmetrical DifferenceSpatial JoinAdd XY DataSite Selection - IAP 2011January 26, 2011
ClipSite Selection - IAP 2011January 26, 2011
BufferSite Selection - IAP 2011January 26, 2011
UnionSite Selection - IAP 2011January 26, 2011
IntersectSite Selection - IAP 2011January 26, 2011
Symmetrical DifferenceJanuary 26, 2011Site Selection - IAP 2011
Spatial JoinPoint in polygonoperation – whichpoints are in thePolygon?Polygon ID (id 1) isadded to the pointlayer’s attributetable.Site Selection - IAP 2011January 26, 2011
Add XY DataSite Selection - IAP 2011January 26, 2011
Things to consider:Vector data processing is CPU intensive.Inaccurate data ininaccurate data outSite Selection - IAP 2011January 26, 2011
Our project:Find a buildinglocation for avisitor’s centerat GreatMeadowsWildlifeRefuge inBedford,Carlisleand Concord,MASite Selection - IAP 2011January 26, 2011
Site Selection - IAP 2011January 26, 2011
Site Selection - IAP 2011January 26, 2011
Site Selection Making Spatial Decisions Using GIS Site Selection - IAP 2011 January 26, 2011 . Representation of data. Site Selection - IAP 2011. . visitor's center. at Great. Meadows. Wildlife. Refuge in. Bedford, Carlisle. and Concord, MA. Site Selection - IAP 2011.
