WEB GIS AND WEB MAP.pptx

ASIM PT

1. WEB GIS AND WEB MAPPING SUBMITTED BY ASIM PT MSc. GEOGRAPHY KANNUR UNIVERSITY SUBMITTED TO DR.BINDU KB ASSISTANT PROFESSOR ON CONTRACT KANNUR UNIVERSITY

2. WEB GIS Web GIS is  an advanced form of Geographic Information Systems available on web platforms . “Web GIS is a type of distributed information system, comprising at least a server and a client, where the server is a GIS server and the client is a web browser, desktop application, or mobile application. In its simplest form, web GIS can be defined as any GIS that uses web technology to communicate between a server and a client,( ESRI,2016)”. 2

3. 3 Client: – Internet Browser such as Internet Explore, Mozila firefox etc Internet Connection: – Performance of a web GIS site largely depends on the bandwidth of the Internet connection – Higher the bandwidth better the performance Web server – Handle the requests from Web Browser (user) and Return the web page Meta Data – data about data – Including Server URL, Owner etc COMPONENTS OF WEB GIS

4. 4 Map Server – The Map Server is the engine behind the maps you see on a web page. – The Map Server needs to be configured to communicate between the web server and assemble data layers into an appropriate image.

5. 5 Web Mapping (Visualization) - It is a common and important functions of Web GIS. Query Asks for information about features display in the map, Point-based queries on map data is a common task. Collecting/Editing geospatial information Dissemination of geospatial information Wide distribution of information Analysis Provide analytical functions WEB GIS FUNCTIONS

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7. ADVANTAGE OF WEB GIS 7 Global accessible – Web remove the constraint of distance A large number of user – Desktop GIS is used by only one users at a time, while Web GIS can be used by dozens or hundreds of user simultaneously. Better cross-platform capability Low cost as averaged by the number of users Makes spatial data accessible to non-technical people – User expect Web GIS as easy as using a regular web site Unified Update Diverse application – Broad user needs drive the innovative applications

8. WEB MAPPING Web mapping is the process of designing, implementing, generating and delivering maps on the World Wide Web. Web mapping provides the ability to access geospatial mapping on the internet through a web browser interface.  emphasizes geodata processing aspects more involved with design aspects such as data acquisition and server software architecture such as data storage and algorithms. 8

9. Types of Web Maps Analytical web maps Analytical web maps offer GIS analysis. The geodata can be a static provision, or needs updates. As web clients gain capabilities processing is distributed. 9

10. Animated Maps Animated maps  show changes in the map over time by animating one of the graphical or temporal variables. Technologies enabling client-side display of animated web maps include  scalable vector graphics  (SVG), Adobe Flash, Java, QuickTime, and others. 10

11. Realtime Maps 11 Realtime maps show the situation of a phenomenon in close to  realtime  (only a few seconds or minutes delay).They are usually animated. Data is collected by sensors and the maps are generated or updated at regular intervals or on demand. Web maps with real-time animation include weather maps,  traffic congestion maps  and vehicle monitoring systems.

12. Collaborative web maps Collaborative maps   are a developing potential. open source collaborative software, users collaborate to create and improve the web mapping experience. Some collaborative web mapping projects are: Google Map Maker Here Map Creator OpenStreetMap WikiMapia meta:Maps  - a survey of  Wikimedia movement  web mapping proposals 12

13. Online atlases The traditional  atlas  goes through a remarkably large transition when hosted on the web. Atlases can cease their printed editions or offer printing on demand. Some atlases also offer raw data downloads of the underlying geospatial data sources 13

14. 14 Static web maps Static web pages are view only without animation  or interactivity. These files are created once, often manually, and infrequently updated. Typical graphics formats for static web maps are  PNG ,  JPEG ,  GIF , Or TIFF  for  raster  files,  SVG ,  PDF  or  SWF  for  vector  files.

15. ADVANTAGES OF WEB MAPS Easy delivery of up to date Availability of software and hardware infrastructure at low cost Easy distribution of product updates Web maps work across browsers and operating systems Capability to combine distributed data sources Web maps allow for personalization Web maps enable collaborative mapping Web maps support hyperlinking to other information on the web Easy to integrate multimedia with web maps. 15

16. CONCLUSION This analysis the current Web GIS architectures, and proposes a Web GIS development process. Web GIS development processes faces new challenges such as technology innovations, voluminous data transfer rate, and non-specialist users. Web GIS development is more than buying GIS software and hardware. In order to succeed, the implementation phase must be considered as a process rather than a step. The process starts with requirement analysis ending in web GIS use and maintenance 16

17. REFERENCE https://www.unescap.org/sites/default/files/5.%20Introduction%20to%20webGIS.pdf http://spatial.ucsb.edu/eventfiles/docs/WebGIS_Principles_and_Applications_UCSB.pdf https://en.wikipedia.org/wiki/Web_mapping https://www.esri.com/arcgis-blog/products/product/uncategorized/web-mapping-101 17

18. 18 Thank you