Search results “Spatial analysis and gis”
Exploring GIS: Spatial analysis and decision making
An introduction to GIS and spatial analysis, measurements in GIS, proximity analysis, vector overlay analysis, geocoding, network analysis, and decision making workflows.
Views: 17402 GIS VideosTV
Basic Spatial Analysis Geographic Information Systems (GIS): A Technical Video Lecture
A Geographic Information Systems (GIS) technical video lecture designed for teaching at the Rochester Institute of Technology (RIT). For questions, comments and more information, contact: Brian Tomaszewski, Ph.D. Department of Information Sciences & Technologies Rochester Institute of Technology Rochester, NY 14623, USA [email protected] http://people.rit.edu/bmtski/ v1.0 – Spring 2017
Views: 4807 GIScienceRIT
Spatial Analysis 2  Overlay Operations & Analysis in GIS
Subject:Geography Paper: Remote Sensing, GIS and GPS
Views: 889 Vidya-mitra
Introduction to Spatial Analysis (GIS) using ArcGIS Desktop and the Time Slider Window
www.knowgis.com (13.2 Minutes) Visit www.KnowGIS.com for more free tutorials. In this free tutorial, we animate spatial features over time, using the ArcGIS Time Slider Window. During this tutorial, we use ArcGIS Destop 10, talk of Spatial Analysis as a method of analysing data though a process of applying analytical techniques. provides an example of how it could be used to facilitate visual analysis. As part of this tutorial, we will "time-enable" spatial data relating to water wells mapped for the state of Montana, USA. We will visualize how data changes over time which provides opportunities for in-depth visual analysis. After a short discussion on Spatial Analysis, we will set the foundation for using the Time Slider Window so we can view temporal change though an animation. The animation will then be exported to a movie for use in non-linear video editing. The Time Slider window provides unique controls that allow spatial data to be visualized in an "animated map". The Time Slider window is invoked by clicking the Open Time Slider Window button on the Tools toolbar. Keep in mind that this button may be unavailable if you do not have any time-enabled datasets in your map, scene, or ArcGIS globe. We;ll add a temporal dataset to ArcMap and then set its time properties in order to visualize it through time using the Time Slider in ArcMap, ArcGlobe, or ArcScene. Visit www.knowgis.com for more tutorials or to learn more about the complete training series for learning and knowing ArcGIS Desktop. Thank you.
Views: 30984 Jere Folgert
Lecture : 8 |ArcGIS 10:  Basic Spatial Analysis
This is the part of Lecture series from SabberFoundation. Lectured by Md. Sabber Ahamed, Jahangirnagar University, Bangladesh. In Facebook : http://www.facebook.com/groups/learnGISforUS/
Views: 110658 SabberFoundation
Sharpen Your Skills - The Power of Spatial Analysis
Lauren bennett talks about how Spatial Analysis can help you do your job.
Views: 7818 Techtoniks - Arc GIS
Spatial Analysis with ArcGIS
Create buffers and polygon overlays in ArcGIS, then conduct complex statistical analyses. Fundamental spatial analyses can be used to generate preliminary geographic estimates. In this case study demo, ArcGIS is used to identify which houses are in high flood risk areas and estimate the potential amount of property damage. Learn more: http://www.esri.com/arcgis/about-arcgis
Views: 1532 ArcGIS
Exploring GIS: Spatial data representation
An overview of how the real world is decomposed and stored digitally in the computer, what are spatial data models, specifying the vector data model, review of the raster data model, and map symbolizations.
Views: 17123 GIS VideosTV
Hydrology Tools in ArcMap ArcGIS Spatial Analysis
Hydrology in ArcMap ArcGIS Spatial Analysis
Views: 61298 Fathy GIS TV
What is SPATIAL ANALYSIS? What does SPATIAL ANALYSIS mean? SPATIAL ANALYSIS meaning & explanation
What is SPATIAL ANALYSIS? What does SPATIAL ANALYSIS mean? SPATIAL ANALYSIS meaning - SPATIAL ANALYSIS definition - SPATIAL ANALYSIS explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
Views: 4793 The Audiopedia
GIS and Spatial Analysis
Luc Anselin's lecture on Geographic Information Systems (GIS) and spatial analysis (2006)
Views: 4387 GeoDa Software
Spatial Analysis for Urban Planning Demo
See how new regression analysis tools in ArcGIS 9.3 allow planners to discover relationships key to predicting urban growth. Recorded at the 2008 ESRI International User Conference.
Views: 32988 esri
ArcGIS Geostatistical Analysis: Spatial Interpolation (IDW)
Spatial Analysis means to manipulate geographic data to extract new meaningful information. Interpolation is one of such geostatistical methods in which we use known values at sampled points to generate a continuous surface giving us prediction of values at unknown points. IDW is an interpolation technique in which values of cells are predicted by averaging known point values while processing each neighborhood cell. Points which are closer to the estimated cell have more weightage in the averages. IDW is preferred over Kriging in situations when sampled points are densely distributed over the surface. How to perform Spatial Interpolation in ArcGIS: 1. Open ArcGIS. 2. Add XY data in ArcMap. In this case, we have an Excel spreadsheet of Monthly Average Precipitation Data in .XLS format. 3. Convert XY data to Shapefile (.shp format). 4. Add boundary over data. 5. Select points which lie within the boundary. 6. Export selected points to new Shapefile. 7. Search for the IDW tool within the Interpolation toolset inside Spatial Analyst toolbox. 8. Choose the column of known point values as Z value field. 9. Mask the output of Raster Analysis to the given boundary in the Environments Settings. The Interpolated surface is obtained which can also be exported as a Raster Dataset for further analysis.
Views: 43737 Geospatial Geeks
Spatial Analysis and Query in GIS
Subject:Geography Paper: Remote Sensing, GIS and GPS
Views: 170 Vidya-mitra
Spatial Analysis in ArcGIS
This video helps to analyze various spatial feature. #spatial_analysis #GIS #Arc_GIS # Analysis
Views: 524 Istiaque Emon
GIS Spatial Analyst Tutorial using John Snow's Cholera Data
Spatial Analyst Tutorial using John Snow's Cholera Data. This tutorial walks you through the basics of how to create a kernel density surface using ArcGIS Spatial Analyst. To see the cholera data in 3D Analyst / ArcScene, you can watch the 3D Analyst tutorial here: http://www.youtube.com/watch?v=Nun95_cQzBg Want to work with the John Snow cholera data yourself? For a similar dataset see: http://www.library.yale.edu/MapColl/files/data/EX_02_Snow_Map.zip
Views: 85719 Chris Goranson
ABCD GIS  OCT 2017 - Tina Cormier - R for Spatial Analysis
Using R for Spatial Analysis, PDF available here: http://gis.harvard.edu/events/seminar-series/using-r-spatial-analysis-example-mapping-forest-biomass
Views: 1763 Harvard CGA
Hotspot Analysing in ArcGIS
This video is about hotspot analysis. In summery, the tools used for this analysis are 1.Integrate 2.Collect Events 3. Increamental Spatial Autocorrelation 4.Hot Spot Analysis (Getis-Ord Gi*) 5.IDW
Views: 14736 GIS Analyst
GIS for Beginners 3: Spatial Analysis
2018 UPDATE... Learn the bare essentials of Spatial Analysis using the free Quantum GIS in my 1 hour follow-along video course (includes a 18 page course workbook and downloadable teaching dataset). Its on the Udemy teaching platform. Click this youtube only link for course details and a 75% discount. https://www.udemy.com/gis-for-beginners-3-spatial-analysis-using-qgis/?couponCode=GIS-FOR-BGNR3YTUBE2 If you enjoyed this video then check out these two resources... * my free 68 page eBook "Environmental Mapping with GIS: Issues and Examples". * my FREE 5 video short course. Signup for these at http://gis-university.com/ Blog: http://gis-university.com/ Facebook: https://www.facebook.com/gisvarsity/
Views: 63 Ian Allan
Spatial Query and Analysis in GIS in HINDI
Buy GIS books (affiliate): Remote Sensing and GIS https://amzn.to/2Ce41NL Advanced Surveying: Total Station, GPS, GIS & Remote Sensing by Pearson https://amzn.to/2wEAXcj An Introduction to Geographic Information Technology https://amzn.to/2Q2XuID Mastering QGIS https://amzn.to/2oFi717 QGIS Python Programming Cookbook https://amzn.to/2wHUkSu QGIS: Becoming a GIS Power User https://amzn.to/2PYCz9D Remote Sensing: Principles and Applications https://amzn.to/2Q4Wi7x Gis: Fundamentals, Applications and Implementations https://amzn.to/2Q5iFK6 Remote Sensing and Geographical Information Systems: Basics and Applications https://amzn.to/2Q2dI4y Textbook of Remote Sensing and Geographical Information Systems https://amzn.to/2Q748h9 Remote Sensing and GIS in Environment Resource Management https://amzn.to/2Q2fpPs ------------------------------------- Notes of Spatial Query and Analysis in GIS in this link - https://viden.io/knowledge/spatial-query-analysis-gis?utm_campaign=creator_campaign&utm_medium=referral&utm_source=youtube&utm_term=ajaze-khan-1
Views: 1682 LearnEveryone
GIS overlays special analysis
Subject: Geology Paper: Remote sensing and GIS Module: GIS overlays special analysis Content Writer: Manika Gupta
Views: 3683 Vidya-mitra
Spatial Analysis and Geoprocessing in GIS [Lecture 6]
🔴 Subscribe: https://bit.ly/2xcAZYW About World Earthquakes: World Earthquakes is a non-profit, non-governmental organisation which offers free public earthquake information services. It was founded on 11th of March, 2010, exactly one year before the Mw 9.0 Tohoku Earthquake. Get More World Earthquakes Live: Official Site: https://www.world-earthquakes.com Join Facebook: https://www.facebook.com/WorldEarthquakesLive Join YouTube: https://www.youtube.com/c/worldethq "Earthquake" in other languages: 地震 aardbewing երկրաշարժ zəlzələ земетресение potres მიწისძვრა σεισμός gempabumi terremoto 地震 지진 земјотрес भूकंप cutremur แผ่นดินไหว deprem. This video is for education purpose only. #spatial #geoprocessing #analysis
Views: 38 worldethq
Spatial  Analysis  in GIS 2 Buffer, Proximity Analysis in GIS
Subject : Geography Paper: Remote Sensing, GIS and GPS
Views: 213 Vidya-mitra
Performing Analysis: Applying Spatial Analysis Techniques to Make Better Decisions
During the session we will present several standardized workflows for conducting spatial analysis. The workshop will include overlay analysis, proximity analysis, and surface analysis, with use cases and software demonstrations. It serves as an overview and introduction to spatial analysis using ArcGIS for Desktop including the new desktop application ArcGIS Pro.
Views: 6100 Esri Events
Bank of Clarke County: Leveraging GIS for Spatial Analysis
Serena Bowen, Business Analyst at Bank of Clarke County discusses how maps and spatial analysis help a traditional bank continue serving long term customers while expanding into new areas. To learn more, visit: http://www.esri.com/industries/banking
Views: 171 Esri Industries
Spatial Analysis in ArcGIS
This is a guide how to do spatial analysis with arcGIS
Views: 624 Nazmul Peyal
GIS and Spatial Analysis for Public Health, Jay Christian, PhD, MPH
Dr. Christian speaks at the monthly CARERC presentation about his work in GIS and Spatial Analysis in Public Health
GIS in Public Health Research: Understanding Spatial Analysis & Interpreting Outcomes
Geographic information systems (GIS) allow us to visualize data to better understand public health issues in our communities. Maps help recognize patterns for hypothesis generation; however, spatial analysis is necessary to substantiate relationships and produce meaningful outcomes. In this presentation we will discuss a few of the basic questions related to spatial analysis: ● How does spatial analysis differ from traditional statistical methods? ● What is the null hypothesis based on spatial randomization? ● Why do we need to look at permutations and spatial weights? ● What is the difference between global and local spatial autocorrelation? ● What does the z-score really mean? ● How do we integrate exploratory data analysis and exploratory spatial data analysis into our research? PowerPoint slides available at: http://hpaocec.uic.edu/gis-in-public-health.html Help us caption & translate this video! http://amara.org/v/Dbin/
Views: 7389 UIC HPAOCEC
ArcMap Shortest path ArcGIS Spatial Analysis
Shortest path for new road in ArcMap ArcGIS Spatial Analysis
Views: 2877 Fathy GIS TV
Exploring GIS: Spatial data sources
An overview of the issues related to spatial data sources for use in a geographic information system. The discussion include: common sources of GIS data, assessing data quality, errors, uncertainty, GPS and Census data.
Views: 5294 GIS VideosTV
pipe line routing using GIS Program ( Spatial Analysis ) شرح بالعربي
اتمنى ان ينال اعجابكم :) to generate profile 3d go to this video https://www.youtube.com/watch?v=pCv7YOHOAfs&list=UUAgnfGctjDFkQwe4PZILY2A Egypt Data http://www.mediafire.com/download/hybcb1oqqtzq0vb/Egypt+Data.rar
Views: 5359 Hesham Ahmed
GIS 110 - Spatial Analysis and The Problem Solving Process
Recorded with http://screencast-o-matic.com
Views: 302 MrsKkelly10
Web GIS: Server and Online: Introduction to Using Spatial Analysis in ArcGIS Online
This workshop introduces the spatial analysis capabilities available with ArcGIS Online. These ready-to-use spatial analysis tools are hosted in the cloud by Esri, and are designed to provide an intuitive, user-friendly experience. We show you how to get started, highlight the overall features and benefits of the analysis tools in ArcGIS Online, through demonstration of different analysis workflows using ArcGIS Online default map viewer.
Views: 1487 Esri Events
11 - Sharpen Your Skills - Spatial Analysis 101
A review of how GIS professionals can use basic analysis tools such as clip, erase, and intersect to help with better decision making.
Views: 1971 esri
Week 1: Spatial Data, Spatial Analysis, Spatial Data Science
Recorded lecture by Luc Anselin at the University of Chicago (September 2017).
Views: 3861 GeoDa Software
Spatial Analysis with GeoDa
GeoDa (https://geodacenter.asu.edu/software) is a free and open source cross-platform program for exploratory (spatial) data analysis or EDA/ESDA and maximum likelihood spatial regression. It has been downloaded nearly 150,000 times and is available on Windows, OS X, and Linux. ASU GeoDa Center: https://geodacenter.asu.edu/software Examining Health Insurance rates at the county level using GeoDa: http://opensourcegisblog.blogspot.com/2014/04/exploring-health-insurance-estimates-by.html
Views: 3329 Open Source GIS Blog
Geospatial Analysis with Python
Data comes in all shapes and sizes and often government data is geospatial in nature. Often times data science programs & tutorials ignore how to work with this rich data to make room for more advanced topics. Our MinneMUDAC competition heavily utilized geospatial data but was processed to provide students a more familiar format. But as good scientists, we should use primary sources of information as often as possible. Come to this talk to get a basic understanding of how to read, write, query and perform simple geospatial calculations on Minnesota Tax shapefiles with Python. As always data & code will be provided. https://github.com/SocialDataSci/Geospatial_Data_with_Python @dreyco676 https://www.linkedin.com/in/johnhogue/
Views: 8039 Rogue Hogue
Spatial Data Mining I: Essentials of Cluster Analysis
Whenever we look at a map, it is natural for us to organize, group, differentiate, and cluster what we see to help us make better sense of it. This session will explore the powerful Spatial Statistics techniques designed to do just that: Hot Spot Analysis and Cluster and Outlier Analysis. We will demonstrate how these techniques work and how they can be used to identify significant patterns in our data. We will explore the different questions that each tool can answer, best practices for running the tools, and strategies for interpreting and sharing results. This comprehensive introduction to cluster analysis will prepare you with the knowledge necessary to turn your spatial data into useful information for better decision making.
Views: 15871 Esri Events
DHS Spatial data and GIS resources
Introduction to spatial data and GIS resources offered by The Demographic and Health Surveys (DHS) Program. This video covers: definitions of DHS Program terms, ways to make basic maps,the GIS training curriculum, the Spatial Data Repository, and The DHS Program GPS datasets. http://www.DHSprogram.com, http://spatialdata.dhsprogram.com
Views: 3112 The DHS Program
soft-GIS - Spatial analysis: Spatial intersection
soft-GIS - Spatial analysis: Spatial intersection -------------------------------------------------------------------- http://www.soft-gis.com
Views: 181 Geosar SA
Solving Spatial Problems Using GIS
Solving Spatial Problems Using GIS
Views: 445 Pete Kennedy
SuperMap GIS 3D Spatial Analysis
This is a demonstration about the 3D Spatial Analysis capabilities of SuperMap, like the Visibility Analysis, Viewshed Analysis and Network Analysis. Follow us on Twitter: www.twitter.com/supermap Like us on Facebook: www.facebook.com/SuperMapGIS For more information : www.supermap.com
Views: 883 SuperMap GIS
Advanced Spatial Analysis Everywhere
Lauren Rosenshein demonstrates several analysis tools that you can use to create services that enable you to share your analysis results and information with others.
Views: 1422 esri
Getting Started with Spatial Data Analysis in R
Spatial and spatial-temporal data have become pervasive nowadays. We are constantly generating spatial data from route planners, sensors, mobile devices, and computers in different fields like Transportation, Agriculture, Social Media. These data need to be analyzed to generate hidden insights that can improve business processes, help fight crime in cities, and much more. Simply creating static maps from these data is not enough. In this webinar we shall look at techniques of importing and exporting spatial data into R; understanding the foundation classes for spatial data; manipulation of spatial data; and techniques for spatial visualization. This webinar is meant to give you introductory knowledge of spatial data analysis in R needed to understand more complex spatial data modeling techniques. In this webinar, we will cover the following topics: -Why use R for spatial analysis -Packages for spatial data analysis -Types of spatial data -Classes and methods in R for spatial data analysis -Importing and exporting spatial data -Visualizing spatial data in R
Views: 39981 Domino Data Lab
Fuzzy Suitability Analysis - Geogrphic informations system ARCGIS - ESRI - GIS
Geospatial Modelling Environment - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/HlMOFgHmSnA Getting Help with GIS - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/HRNkpUVDIME Getting the Crop Data - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/btesfNifhvY GIS Terminology to Know - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/OgkJ4n3zW-g Hillshade - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/fEKpZIKKb-s How Assignments Work in this Course - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/da7iGhGSbHI Installing and Licensing ArcGIS - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/D-Ijn81OxQE Interactive Selection - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/yehJie0Kf7M Intersect Tool - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/WgOKo-5u75E Joins and Relates - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/AurZE02O4NM Labeling Map Features - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/yQRS9gInmm0 Loading Layers in ArcGIS Online - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/kBddOGcGmQY Making Map Books - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/raCuPOj7zZc Managing Data in the Catalog Window - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/LUIJ5IJUbSA Map Algebra Raster Calculator Overlaying Rasters eogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/PxXIczLpATM Map Annotations and Scaling in ArcGIS Online Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/5oHbqlRrH1w Merge Tool - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/vWADgTwBZ3Y Modes of Acquisition Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/CJv_J75gTRQ Module 1 Summary Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/qDiyXF8fdgQ Module 1 Summary 2 Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/1jTtrNCd1Iw Module 2 Overview Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/kY_LhdRFBAw Module 3 Summary Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/JVG8j2tzI3Q Module 3 Summary 2 Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/0LXeA_9uCpU Module 4 Summary Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/0rRGgYEbfws Near and Generate Near Table Tools Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/JGWTrbTHKCI Normalized Difference Vegetation Index NDVI Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/JYB8mIxuBbc Online and Connected Applications - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/pBs8TY4crmI Other GIS Tools & Plugins, and Joining Communities - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/uBE1Vv9VoF0 Output Coordinate System Environment Variable - Geogrphic informations system ARCGIS - ESRI - GIS https://youtu.be/wZv2qyI0JUQ Knowledge of Geographic Information Systems (GIS) is an increasingly sought after skill in industries from agriculture to public health. This Specialization, offered in partnership with ArcGIS developer Esri, will teach the skills you need to successfully use GIS software in a professional setting. You will learn how to analyze your spatial data, use cartography techniques to communicate your results in maps, and collaborate with peers in GIS and GIS-dependent fields. In the final Capstone Project, you will create a professional-quality GIS portfolio piece using a combination of data identification and collection, analytical map development, and spatial analysis techniques.
Views: 2823 Amanda white
Lesson 1 - Part 1: Spatial Autocorrelation
Lesson 1 - Introduces viewers to the discipline of geography, a bit about it's context, scope, and coverage. Part 2 - this video discusses spatial autocorrelation and the first law of geography. Part 1 of this series introduces the viewer to geography and describes its origins and history and the topics it covers This video is part of a 5-Lesson introductory video set to be used as an introduction to Geography and Open Source GIS in an innovative new curriculum titled GIS for Youth Empowerment.
Spatial Statistics Tools in ArcGIS
Understand hidden spatial relationships and patterns in your data using ArcGIS. Use spatial statistics and analysis to view clusters and hotspots. Watch this video to see a demo of these tools in action, and see an example of how to find and solve a real-world problem. The case study in this video examines childhood obesity rates to identify potential causes and possible solutions. Learn more: http://www.esri.com/arcgis/about-arcgis
Views: 2630 ArcGIS
What is GEOSPATIAL ANALYSIS? What does GEOSPATIAL ANALYSIS mean? GEOSPATIAL ANALYSIS meaning - GEOSPATIAL ANALYSIS definition - GEOSPATIAL ANALYSIS explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Geospatial analysis, or just spatial analysis, is an approach to applying statistical analysis and other analytic techniques to data which has a geographical or spatial aspect. Such analysis would typically employ software capable of rendering maps processing spatial data, and applying analytical methods to terrestrial or geographic datasets, including the use of geographic information systems and geomatics. Geographic information systems (GIS), which is a large domain that provides a variety of capabilities designed to capture, store, manipulate, analyze, manage, and present all types of geographical data, and utilizes geospatial analysis in a variety of contexts, operations and applications. Geospatial analysis, using GIS, was developed for problems in the environmental and life sciences, in particular ecology, geology and epidemiology. It has extended to almost all industries including defense, intelligence, utilities, Natural Resources (i.e. Oil and Gas, Forestry ... etc.), social sciences, medicine and Public Safety (i.e. emergency management and criminology), disaster risk reduction and management (DRRM), and climate change adaptation (CCA). Spatial statistics typically result primarily from observation rather than experimentation. Vector-based GIS is typically related to operations such as map overlay (combining two or more maps or map layers according to predefined rules), simple buffering (identifying regions of a map within a specified distance of one or more features, such as towns, roads or rivers) and similar basic operations. This reflects (and is reflected in) the use of the term spatial analysis within the Open Geospatial Consortium (OGC) “simple feature specifications”. For raster-based GIS, widely used in the environmental sciences and remote sensing, this typically means a range of actions applied to the grid cells of one or more maps (or images) often involving filtering and/or algebraic operations (map algebra). These techniques involve processing one or more raster layers according to simple rules resulting in a new map layer, for example replacing each cell value with some combination of its neighbours’ values, or computing the sum or difference of specific attribute values for each grid cell in two matching raster datasets. Descriptive statistics, such as cell counts, means, variances, maxima, minima, cumulative values, frequencies and a number of other measures and distance computations are also often included in this generic term spatial analysis. Spatial analysis includes a large variety of statistical techniques (descriptive, exploratory, and explanatory statistics) that apply to data that vary spatially and which can vary over time. Some more advanced statistical techniques include Getis-ord Gi* or Anselin Local Moran's I which are used to determine clustering patterns of spatially referenced data. Geospatial analysis goes beyond 2D and 3D mapping operations and spatial statistics. It includes: Surface analysis —in particular analysing the properties of physical surfaces, such as gradient, aspect and visibility, and analysing surface-like data “fields”; Network analysis — examining the properties of natural and man-made networks in order to understand the behaviour of flows within and around such networks; and locational analysis. GIS-based network analysis may be used to address a wide range of practical problems such as route selection and facility location (core topics in the field of operations research, and problems involving flows such as those found in hydrology and transportation research. In many instances location problems relate to networks and as such are addressed with tools designed for this purpose, but in others existing networks may have little or no relevance or may be impractical to incorporate within the modeling process....
Views: 974 The Audiopedia