logging in or signing up GIS mrcornish Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 12528 Category: Entertainment License: All Rights Reserved Like it (13) Dislike it (2) Added: April 30, 2009 This Presentation is Public Favorites: 6 Presentation Description No description available. Comments Posting comment... By: geogteach007 (14 month(s) ago) A useful presentation, just teaching good and services to my class. Thank you. Saving..... Post Reply Close Saving..... Edit Comment Close By: rahulsurve9469 (15 month(s) ago) hiii sir i wanna download this ppt for class presentation plz its ahumble request allow me the permission... Saving..... Post Reply Close Saving..... Edit Comment Close By: dtierney (27 month(s) ago) I'd like to download PPT for classroom use. We don't stream well. Saving..... Post Reply Close Saving..... Edit Comment Close By: naiberasool (29 month(s) ago) how r u i want to download your presentation if u allow me Saving..... Post Reply Close Saving..... Edit Comment Close By: angle11 (29 month(s) ago) very nice Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript GIS Geographical Information Systems : GIS Geographical Information Systems Edexcel Unit 2: David Holmes, Principal Examiner So what is GIS?: So what is GIS? “GIS has the ability to store, retrieve, manipulate and analyse a range of spatially related data” Its all about layers of spatial information that can be turned on or off. True GIS is underpinned by a vast dataset with gives the locations (‘vectors’) of particular values. This allows the software then to plot information. Even the free web-based GIS works like this, except that the user has very much less control over the actual software and cannot easily interrogate the data set. So, the GIS user can: ask questions of data related to the map search for patterns and distributions investigate the underlying relationships between different sets of data GIS and digital maps: GIS and digital maps There are lots of places that you can experience this on the internet Simple is fine! Lots of resources, e.g. Teachers TV Consider the GIS spectrum….: Consider the GIS spectrum…. GPS and GIS is all around: GPS and GIS is all around Using GPS and GIS to find routes in a car – ‘Tom Tom ’ GIS as a research tool : GIS as a research tool Google maps/ earth – free online GIS Yellow pins are placemarks Student photos added along transects Coloured transect lines added GE Graph: GE Graph GE Graph can be used to create your on ‘ kml ’ overlays of graphical data Linking PDA, GPS and GIS to produce maps: Linking PDA, GPS and GIS to produce maps But there can be issues…..: But there can be issues….. An operator may choose display options which completely hide or over emphasise spatial patterns. Colour, symbol size, method of data classification, number of classes, data aggregation are all factors which are manipulated in the production of maps. Who created the data set – and why. Age of data? A question of resolution (raster data): A question of resolution (raster data) building lake river woodland Real World Low spatial resolution Higher spatial resolution At what spatial resolution do we represent places? What are potential implications of this choice? Are results always ‘black and white’?: Are results always ‘black and white’? Burglary hotspots probation Big issues if used to determine practice / policy! Type of burglary? How reported / recorded? Resolution of mapping data Role of ‘virtual fieldwork’ & GIS: Role of ‘virtual fieldwork’ & GIS What do we mean by VF? Google Earth (including ‘Street maps’, Mapping software, e.g. Anquet Maps, Memory Map, Aegis Use as a top-up tool Allows more ‘coverage’ – use simulations and suggestions (there is a lot of overlap in the specification). RESOURCE EFFICIENT Finding out more…: Finding out more… You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.