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GPHY384- lectures 10&11

by: Sarah Massar

GPHY384- lectures 10&11 GPHY 384

Sarah Massar
GPA 3.9

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About this Document

These notes cover spatial analysis and synthesis (transformations and buffers)
Advanced GIS and Spatial Analysis
Stuart Challenger
Class Notes
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This 2 page Class Notes was uploaded by Sarah Massar on Saturday February 20, 2016. The Class Notes belongs to GPHY 384 at Montana State University taught by Stuart Challenger in Fall 2015. Since its upload, it has received 18 views. For similar materials see Advanced GIS and Spatial Analysis in Earth Sciences at Montana State University.

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Date Created: 02/20/16
GPHY384 Lecture 10&11 2/16&18 Lecture 10 2/16 SPATIAL ANALYSIS AND SYNTHESIS: -there are different levels of complexity on a map -Visual- map interpretation -very basic complexity, needs to be there -Query- queries, histograms, table relationships -queries can be done from the attribute table or as a definition query in properties -Distance- 3 types (Euclidean, network, and cost surface) -Transformations- creating new info from existing -Surface Analysis- raster, continuous surface -Network Analysis- charting the movement of substances -FedEx, stream systems moving pollutants -Spatial Statistics -Modeling +Distance -Euclidean-a straight line, Pythagoreans theorem -Network-linear networks like roads or rivers -Cost Surface- cost weighted difference, add in elevation and how much it would be to cover the distance not only horizontally, but vertically as well +Transformations- moving the coordinates of something on the map -Neighborhood functions -Buffers -in vector represented as Euclidean distance -in raster it is Euclidean or cost -Adjacency-what is next to it -raster represents well -vector used right and left polygons for this function -Proximity-what’s close -raster represents well -vector uses distance methods to show this -Spatial Overlay: Concepts -Polygon on Polygon -Point in Polygon -Line in Polygon -Spatial Overlay: Methods -Union- all input features are included as an output feature -Intersect- only input features that overlap are included in the output -Identity- only all of the features from one input set and all overlapped features are included Lecture 11 2/18 SPATIAL ANALYSIS AND SYNTHESIS CONT. +Model- abstract of reality +Analysis- separating of something into parts to study it -breaking down +Synthesis- combining separate parts into a complex whole -putting together -most of what we do in ArcMap -Spatial analysis applies to above 3 things -They are the crux of GIS -adds value to data -supports decisions -revels patterns +Geographic Modeling- attempting to predict/represent reality using analysis and synthesis +Work flow- the order in which a task is completed -flow charts very helpful for this


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